1984 Mercury Topaz Fuel and Emissions Systems

Name: Fuel Tank Cleaning Kit
Brand: Delphi
SKU: FC01
Price: 12.49 USD

Below you will find various in-demand Mercury Fuel and Emissions Systems, components and accessories for your 1984 Topaz. Advance Auto Parts has popular Topaz parts like Air Flow Sensors, Fuel Tanks, Fuel Pumps and more. You’ll also find aftermarket and OEM Fuel and Emissions Systems for other Topaz model years including 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994 and more. Select a category of 1984 Mercury Topaz Fuel and Emissions Systems below and start saving instantly.

Popular 1984 Mercury Topaz Fuel and Emissions Systems Categories

Fuel Tank Cleaning Kits

Gas Caps

Fuel Pumps

Oxygen Sensors

Manifold Air Pressure Sensors

Canister Purge Solenoids

Air Charge Temperature Sensors

Fuel Tank Lock Rings

Fuel Tank Vent Valves

EEC-IV Test Plug Connectors

Fuel Cap Tester Adapters

Fuel Tank Vent Valve Seals

Essential Fuel and Emissions Systems for 1984 Mercury Topazs

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$12.49

When replacing a fuel pump or module, it’s extremely important to clean the tank. Existing dirt, debris, and contamination stuck in the fuel tank can clog the brand-new strainer. Delphi’s Fuel Tank Cleaning Kit (FC01) and Tool (FC02) can help clean your fuel tank in less than five minutes. The FC01 includes a low-suds solution, cloth, and gloves that works together with the FC02 to help clean those hard to reach places without having to remove the fuel tank. Visit our Resource Center for helpful tips and tricks on fuel pumps, technologies, and more: https://www.delphiautoparts.com/usa/en-US/resource-center.

Product Features:

Helps avoid premature fuel pump failure
Lint free towel included
Low suds formulation
Removes harmful contaminants from the fuel tank

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$14.99

Carquest Premium fuel pump tank seals are built by Carter Fuel Systems and Agility Auto Parts, industry leaders in high-quality fuel system components. Carquest Premium offers a complete line of fuel pump tank seals covering a wide variety of North American vehicle applications. Carquest Premium fuel pump tank seals are engineered to meet or exceed all OEM specifications.

Product Features:

Engineered to meet or exceed all OEM specifications.
Precision stamped and are treated with a rust proof finish to ensure durability and strength

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$27.99

This fuel tank vent valve is designed to match the fit and function of the original valve on specified vehicles, and is engineered for durability and reliable performance.

Product Features:

Direct replacement – this fuel tank vent valve is designed to match the fit and function of the original valve on specified vehicles
Restores functionality – this valve is made to fit and fully restore part functionality after the original valve fails
Durable construction – this part is made from quality materials to ensure reliable performance and long service life
Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience

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$39.99

Bosch is the world’s leading supplier and original equipment manufacturer of Oxygen Sensors. Bosch invented the automotive oxygen sensor and leads the way in sensor technology and innovation. From overall sensor design to the critical ceramic element, Bosch is known worldwide for quality and performance.

Product Features:

Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
Includes Smart Link Connector, no soldering required
No special tools required for installation
Seared protection tube due to 100% functional quality test
Performance meets or exceeds OE specifications

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$32.99

Modern vehicles may have 100 or more electrical harness connectors in every operating system of the vehicle. Terminal tension may weaken with time or corrosion may occur within the connector housing making replacement necessary. When replacing any harness-connector assembly approved wire termination methods must be followed to ensure a successful and long-term solution to the original problem is made. A failed terminal connection, terminal corrosion or damaged wire will result in an electrical system fault.

Product Features:

Carquest electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
WVE electrical connectors meet or exceed OE wire gauge, insulation, and terminal material requirements.
Product constructed to meet all design and operating characteristics as intended by the manufacturer.
OE specified wire gauge to ensure a reliable electrical connection
Designed to meet or exceed OE specifications in form, fit and function

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$33.99

The Secondary Air Injection system is an emission control device designed to pump fresh air into the engine exhaust system to reduce harmful emissions. The Air Injection Pump Check Valve will allow air flow in one direction only to prevent an engine back-fire condition.

Product Features:

Application matched component to ensure the system can be returned to like new condition.
Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.

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$32.99

Application matched component to ensure the system can be returned to like new condition.
Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.

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$19.99

New Standard Replacement Fuel Tank Lock Ring, Large Gauge Fuel Level Sensor Hole: 2 5/8 Inch Or 3 5/8 Inch, Includes O-Ring, For 16 And 19 Gallon Tanks

Product Features:

Large Gauge, Fuel Level Sensor Hole, 2 5/8 Inch Or 3 5/8 Inch, Includes O-Ring, For 16 And 19 Gallon Tanks
Meets All Federal Motor Safety Standards
No Drilling Needed For Installation
No Modifications Needed For Installation
Direct Fit Replacement For Your Vehicle
Same Form Fit And Function As OE
Check Out The Large Selection Of Parts Available For Your Vehicle

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$17.29

This fuel tank sending unit lock ring is designed to help restore the connection between the fuel pump, module and/or sending unit and the fuel tank on specified vehicles. It is engineered to match the performance of the original equipment lock ring when the factory ring has failed or is damaged. Manufactured to precise specifications for specified vehicles, it is made with durable materials for reliable performance and long life.

Product Features:

Direct replacement – this fuel tank sending unit lock ring is designed to help restore the connection between the fuel pump, module and/or sending unit and the fuel tank on specified vehicles
Ideal solution – engineered to match the performance of the original equipment lock ring when the factory ring has failed or is damaged
Durable construction – designed and manufactured to strict specifications for reliable performance
Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience

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$12.99

This fuel tank vent valve seal acts as a gasket between the fuel tank and rollover valve to prevent debris or moisture from entering the tank, and fuel or vapor from exiting. Check the product dimensions and vehicle fitment information to select the correct seal for your application.

Product Features:

Direct replacement – this fuel tank vent valve seal is designed to match the fit and function of the original equipment gasket in specified applications
Ideal solution – engineered to securely seal the vent valve to the fuel tank when the original seal is leaking or has failed from exposure to fuel
Durable construction – made of quality materials for reliable performance and long service life
Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience

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$91.99

Carquest Premium electric fuel pumps are engineered by Carter Fuel Systems or Agility Auto Parts to meet or exceed Original Equipment (OE) specifications for fit, form and function. Our Carquest Premium fuel pumps are built to be installed in the Original Equipment module or assembly. We have invested in industry-leading quality upgrades, like upgraded turbine impellers and 100% carbon commutators, to deliver greater reliability. Carquest Premium electric fuel pumps are engineered with superior quality components to provide the longest life and reliable performance.

Product Features:

Meets or exceeds OE specifications for fit, form and function
100% carbon commutators provide resistance to aggressive fuels and double the life expectancy of the pump
OE upgraded turbine impellers greatly reduce fuel pulsation
All fuel pumps are 100% performance tested

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$104.99

Our team of Bosch Engineers brings the benefits of premium fuel pumps to the Automotive Aftermarket. Bosch fuel pumps are produced in the same production lines and are built then tested to the same exacting quality standards as Bosch OE fuel pumps to ensure a long, reliable service life. Get the job done right the first time, every time, with Bosch Premium fuel pumps.

Product Features:

Bosch “Better than OE design”, improves upon ease of installation, drivability of your vehicle and extends the life of the vehicle
Patented Turbine Pump technology virtually eliminates fuel pulsation, noise, and reduces hot-start problems
Electromagnetic shielding prevents on-board electronic interference from fuel pump
Designed to operate under extreme temperatures and under low fuel conditions while maintaining an extended service life
All Bosch fuel pumps are ‘end-of-line’ function tested in order to ensure highest quality and performance of all pumps in our program.

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$16.99

Replace only the damaged connectors instead of the entire fuel line with these direct-replacement fuel line connectors. Designed for easy installation and a precise fit, they are engineered to withstand extreme underhood conditions.

Product Features:

Direct replacement – these fuel line connectors fit and function like the vehicle’s original equipment connectors for reliable, leak-free performance
Quality construction – manufactured from premium materials for a long service life
Saves money – replace only the part, not the entire assembly
Excellent value – original equipment quality at a lower price

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$15.99

Direct replacement – these fuel line connectors fit and function like the vehicle’s original equipment connectors for reliable, leak-free performance
Quality construction – manufactured from premium materials for a long service life
Saves money – replace only the part, not the entire assembly
Excellent value – original equipment quality at a lower price

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$22.99

The Air Charge Temperature Sensor provides an input to the vehicles computer as to the temperature of the air entering the engine via the air cleaner assembly. The engine computer uses this input to control many operating conditions which in turn provides optimal engine operation, engine performance and clean tailpipe emissions.

Product Features:

Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
100% end-of-line tested to ensure accurate signal output providing product reliability, every time.
Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
Lead frame terminal size and location determined using image dimension measuring system or 3D laser scanner.
Application matched components ensures system operation in like new condition.

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$32.99

Building upon a foundation of premium full-line products established under NGK ignition and NTK oxygen sensor products, NTK’s expansion to technical sensors is part of our ongoing commitment to streamline product types and increase coverage under one premium brand: NTK, The Sensor Specialist. With over 80 years of automotive expertise, NGK’s family of automotive products are driven by extreme dedication to innovation, performance and quality. NTK is the only OE supplier with a full line of technical sensors in the aftermarket for import and domestic vehicles. Drawing from OE experience, NTK sensors undergo extreme testing conditions that include thermal shock, vibration and OBD verification. NTK sensors are manufactured to ensure a quality that meets or exceeds OE specifications. As new vehicles incorporate connected and automated technologies, trust The Sensor Specialist for full-line market support and OE application technology.

Product Features:

OE MATCHED: Wires and probe length match OE. Mounting clip(s) included where applicable
FASTER RESPONSE TIME: Thermal conductive grease inside brass housing increases sensor response time

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$5.49

Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:

Meets or exceeds all original equipment specifications
Application specific design to ensure a perfect fit
Engineered for the sealing repair environment
Validated for fit, form and function
Unsurpassed quality you can trust

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$34.99

The EGR system is an emission control device designed to recirculate exhaust gas into the engines air intake system and back to the combustion chamber to control nitrogen oxides or NOx. The chemical NOx is created when oxygen and nitrogen are heated above 2,800-degree F. Exhaust gas, or gas that is displaced from the combustion chamber, contains little to no oxygen molecules. By recirculating this gas back into the combustion chamber fewer oxygen molecules are available for the combustion event which will therefore create a cooler combustion event. The EGR valve can be actuated by engine vacuum or electronically by the engine control module.

Product Features:

Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
Our EGR valves are designed to match the vehicle specific exhaust gas flow rate as designed by the engine manufacturer to provide clean tail pipe emissions.
Feedback EGR valves and pressure sensors contain a robust circuit board design which increases durability due to heat, shock, and random electro-magnetic pulses (EMP) and power spikes.
100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
Where applicable stainless-steel sleeves used over cold rolled sleeves providing smooth EGR pintle operation under all operating conditions.

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$15.49

Product Features:

Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

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$15.99

Manufactured with OEM quality materials and safety standards by an OE Supplier. Manufactured to pass all state and federal emissions requirements. Specifically designed pressure and vacuum relief valves to prevent evaporation of fuel. A leaking fuel cap can allow up to 30 gallons of gasoline to evaporate over the period of a year.

Product Features:

Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

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$17.79

Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.

Product Features:

BAR Certified adapters
Adapter check’s a fuel cap’s ability to hold pressure.
Adapters meet EPA standards for recommended fleet coverage.
Check adapter application chart for specific makes and models

from

$34.99

Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.

Product Features:

BAR Certified adapters
Adapter check’s a fuel cap’s ability to hold pressure.
Adapters meet EPA standards for recommended fleet coverage.
Check adapter application chart for specific makes and models

from

$59.99

CARQUEST MAP sensors are manufactured with critical OEM components to ensure that your engine runs efficiently to reach the best gas mileage on your vehicle.

Product Features:

CARQUEST MAP sensors connectors are exact OE fit to ensure the proper vacuum is maintained to prevent power loss and to minimize internal contamination.
CARQUEST MAP sensors utilize high temperature resistant seals. Damaged seals can directly impact the vehicles fuel-to-air ratio, making it less fuel efficient.
CARQUEST MAP sensors are 100% individually tested for all product functionalities including proper vacuum seal and electrical output.

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$70.99

Delphi’s ever growing portfolio of high quality vehicle sensors are backed by stringent OE development and product validation methods. We offer a wide range of sensors, including ABS, camshaft, crankshaft, knock, EGT, MAP, temperature, throttle position, and vehicle speed sensors for a variety of vehicle applications. All of our sensors are tested and calibrated to OE standards, ensuring accurate readings, which helps to reduce comebacks.

Product Features:

Insulated with silicone gel over the integrated circuit chip to protect against shock and vibration for increased durability
Internally protected against moisture intrusion and vibration
Long lasting and durable
Designed and engineered with Delphi expertise

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$103.99

Building upon a foundation of premium full-line products established under NGK ignition and oxygen sensor products, NTK’s expansion to technical sensors is part of our ongoing commitment to streamline product types and increase coverage under one premium brand NTK, The Sensor Specialist. With over 80 years of automotive expertise, NGK’s family of automotive products are driven by extreme dedication to innovation, performance and quality. is the only OE supplier with a full line of technical sensors in the aftermarket for import and domestic vehicles. Drawing from OE experience, sensors undergo extreme testing conditions that include thermal shock, vibration and OBD verification. sensors are manufactured to ensure a quality that meets or exceeds OE specifications. As new vehicles incorporate connected and automated technologies, trust The Sensor Specialist for full-line market support and OE application technology.

Product Features:

The Manifold Absolute Pressure Sensor (MAP) provides manifold pressure information to the Engine Control Unit (ECU). The data is used to determine the air mass flow rate and required fuel for optimum combustion and ignition timing.
NTK’s Manifold Absolute Pressure Sensors are manufactured to operational performance standards to meet or exceed OE fit, form and function to ensure proper manifold pressure, fuel metering and ignition timing.

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$64.99

Maximize your vehicle’s efficiency and emissions control with Carquest Vapor Canister Purge Solenoids. Engineered for precision, these solenoids seamlessly regulate the flow of fuel vapors from the Vapor Canister to the engine for cleaner combustion, reducing harmful emissions. Built to meet and/or exceed OEM standards, Carquest Purge Solenoids offer reliable functionality, long-lasting durability, and easy installation.

Product Features:

Enhances overall engine performance by providing proper vapor flow to maintain correct air-fuel mixture.
Helps reduce harmful emissions and ensures compliance with environmental regulations by controlling the release of fuel vapors into the engine
Ensures precise operation with electromagnetic principles to control the flow of fuel vapors from the carbon canister to the engine
Manufactured from high quality engineered materials, resistant to fuel vapors and extreme temperatures, ensuring long lasting performance
Meets or exceeds all OEM specifications

Upgrade your 1984 Mercury Topaz with Top-Quality Fuel and Emissions Systems

When it comes to maintaining or upgrading your 1984 Mercury Topaz, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Mercury or enhancing its overall performance, Fuel and Emissions Systems are key to keeping your Topaz functioning at its best. At Advance Auto Parts, we offer a wide selection of 47 Fuel and Emissions Systems for the 1984 Mercury Topaz, designed to meet your needs without breaking the bank. From Air Flow Sensor replacements to Fuel Tanks upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.

Affordable Prices and Wide Selection

Shopping for Fuel and Emissions Systems for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Fuel and Emissions Systems for your 1984 Mercury Topaz at great prices. Our Fuel and Emissions Systems inventory for this model ranges from just $3.99 to $103.99, with an average price of $24.24. Our 47 Fuel and Emissions Systems in stock come from 10 trusted brands, so you’re sure to find the right part for your 1984 Mercury Topaz without overspending.

Top Brands and High Customer Satisfaction

Advance Auto Parts takes pride in offering only the best brands in the automotive industry. For your 1984 Mercury Topaz, we stock popular OEM and aftermarket Fuel and Emissions Systems from top names like Bosch, FELPRO, Carquest Premium, and more. Bosch Fuel and Emissions Systems start at just $39.99 and boast an impressive 4.7 stars average rating from customers. FELPRO and Carquest Premium also bring quality to the table, with Fuel and Emissions Systems available starting at $3.99, and at an average 4.6 stars rating. With 893 customer reviews and counting, our 1984 Mercury Topaz Fuel and Emissions Systems have a strong track record of reliability, ensuring you can trust your purchase.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Fuel and Emissions System upgrades. Explore related part types like Batteries and Chargers, Oil and Lubricants and more to make sure your 1984 Mercury Topaz is always ready to roll. We’re committed to providing you with everything you need to keep your Topaz in top shape, all in one place. Start shopping confidently below for your 1984 Mercury Topaz!

Best-Selling Air Flow Sensors for 1984 Mercury Topazs

Enhance the driving experience in your Mercury with 5 quality Air Flow Sensor components, starting at $21.99.

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from

$103.99

The Manifold Absolute Pressure Sensor (MAP) provides manifold pressure information to the Engine Control Unit (ECU). The data is used to determine the air mass flow rate and required fuel for optimum combustion and ignition timing.
NTK’s Manifold Absolute Pressure Sensors are manufactured to operational performance standards to meet or exceed OE fit, form and function to ensure proper manifold pressure, fuel metering and ignition timing.

from

$59.99

CARQUEST MAP sensors are manufactured with critical OEM components to ensure that your engine runs efficiently to reach the best gas mileage on your vehicle.

Product Features:

CARQUEST MAP sensors connectors are exact OE fit to ensure the proper vacuum is maintained to prevent power loss and to minimize internal contamination.
CARQUEST MAP sensors utilize high temperature resistant seals. Damaged seals can directly impact the vehicles fuel-to-air ratio, making it less fuel efficient.
CARQUEST MAP sensors are 100% individually tested for all product functionalities including proper vacuum seal and electrical output.

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$32.99

OE MATCHED: Wires and probe length match OE. Mounting clip(s) included where applicable
FASTER RESPONSE TIME: Thermal conductive grease inside brass housing increases sensor response time

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$21.99

The temperature of various systems must be reported to the engine control module (ECM) as well as other operating system controllers in the vehicle. Coolant temperature, cabin temperature, exhaust temperature and ambient temperature are just a few systems reported by a temperature sensor. The temperature sensor is fed 5 volts by the systems computer, within the sensor housing will be a thermistor, or dropping resistor whose resistance value will change as the temperature surrounding it changes. Changing resistance in the circuit will change the volt signal at the processor indicating the current operating value.

Product Features:

Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
100% end-of-line tested to ensure accurate signal output providing product reliability, every time.
Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
Lead frame terminal size and location determined using image dimension measuring system or 3D laser scanner.
Application matched components ensures system operation in like new condition.

from

$22.99

Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
100% end-of-line tested to ensure accurate signal output providing product reliability, every time.
Tin plated lead frame prevents corrosion and ensures a reliable terminal connection under adverse ambient conditions.
Lead frame terminal size and location determined using image dimension measuring system or 3D laser scanner.
Application matched components ensures system operation in like new condition.

Top Picks for 1984 Mercury Topaz Fuel Pumps

Upgrade Mercury Topazs with top-quality Fuel Pumps parts, including 4 OEM and aftermarket selections for your 1984 model.

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from

$69.99

Gravity fed type pump with simple two-wire design. Works on 12 Volt negative ground systems only. Includes fittings and mounting hardware along with easy to follow DIY instructions. Pumps require approximately one amp average draw at maximum delivery. Flows 35 GPH (gallons per hours at 4-7 PSI (pounds per square inch). Universal design for most domestic 4, 6, & 8-cylinder carburetor applications.

Product Features:

Solid-state Worry Free Electronics
Internal Pressure Regulating
Universal Design Allows For Easy Installation
No DiaphraGMs Or Mechanical Parts To Wear Out
They Make An Excellent Fuel Transfer or Booster Pump
Not designed for use on aircraft of any type.
Hose Barbs Fit 5/16″ Fuel Hose
Self-priming, 2 wire design
Eliminates vapor lock and flooding

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$62.99

New Platinum Pro Fuel Pump Module

Product Features:

Meets All Federal Motor Safety Standards
No Drilling Needed For Installation
No Modifications Needed For Installation
Direct Fit Replacement For Your Vehicle
Same Form Fit And Function As OE
Check Out The Large Selection Of Parts Available For Your Vehicle

from

$34.99

Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.

Product Features:

BAR Certified adapters
Adapter check’s a fuel cap’s ability to hold pressure.
Adapters meet EPA standards for recommended fleet coverage.
Check adapter application chart for specific makes and models

from

$17.79

Fuel Cap Tester Adaper for use with Stant fuel cap testers. Color coded for easy identification. Made of durable plastic.

Product Features:

BAR Certified adapters
Adapter check’s a fuel cap’s ability to hold pressure.
Adapters meet EPA standards for recommended fleet coverage.
Check adapter application chart for specific makes and models

In-Demand Gas Caps for 1984 Mercury Topazs

Select from 21 premium Gas Caps parts for your 1984 Mercury Topaz, with prices ranging from $7.99 to $31.99.

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from

$15.79

Product Features:

Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control
Independently tested for emission control

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$11.99

Passes all state and federal emissions tests
Independently tested for emission control
Independently tested for emission control
Protects your fuel from theft and vandalism
Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials

from

$16.79

Passes all state and federal emissions tests
Independently tested for emission control
Protects your fuel from theft and vandalism
Protects your fuel from theft and vandalism
Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials

from

$12.99

Product Features:

Passes all state and federal emissions tests
Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

from

$14.99

Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

from

$15.49

Product Features:

Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

from

$15.99

Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

from

$24.99

Protects your fuel from theft and vandalism
Protects your fuel from theft and vandalism
Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

from

$16.99

Product Features:

Passes all state and federal emissions tests
Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

from

$23.99

Product Features:

Protects your fuel from theft and vandalism
Protects your fuel from theft and vandalism
Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

from

$24.99

Independently tested for emission control
Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

from

$21.79

Protects your fuel from theft and vandalism
Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

from

$22.99

Product Features:

Protects your fuel from theft and vandalism
Protects your fuel from theft and vandalism
Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

from

$12.49

Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control

from

$7.99

Passes all state and federal emissions tests
Independently tested for emission control
Independently tested for emission control
Protects your fuel from theft and vandalism
Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials

from

$31.99

Product Features:

Protects your fuel from theft and vandalism
Passes all state and federal emissions tests
Manufactured from durable, long-life materials
Reduces air pollution with proper sealing and venting
Independently tested for emission control
Independently tested for emission control

from

$24.29

Come pre-assembled for quick and easy installation.
Several fastener options to work with any fuel cap compartment configuration
Fits vehicles orginally equipped with tether
Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials

from

$11.79

Passes all state and federal emissions tests
Independently tested for emission control
Independently tested for emission control
Protects your fuel from theft and vandalism
Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials

from

$22.99

Product Features:

Passes all state and federal emissions tests
Independently tested for emission control
Protects your fuel from theft and vandalism
Protects your fuel from theft and vandalism
Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials

from

$20.99

Come pre-assembled for quick and easy installation.
Several fastener options to work with any fuel cap compartment configuration
Fits vehicles orginally equipped with tether
Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials

from

$10.99

Passes all state and federal emissions tests
Independently tested for emission control
Independently tested for emission control
Protects your fuel from theft and vandalism
Reduces air pollution with proper sealing and venting
Manufactured from durable, long-life materials

Most Sold 1984 Mercury Topaz Oxygen Sensors

Explore our best-selling Mercury parts for the 1984 Topaz among 1 OEM and aftermarket options starting from $39.99.

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from

$39.99

Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
Includes Smart Link Connector, no soldering required
No special tools required for installation
Seared protection tube due to 100% functional quality test
Performance meets or exceeds OE specifications

Top-Rated Fuel and Emissions Systems Brands For Your 1984 Mercury Topaz

Shop for the best-rated brands offering Fuel and Emissions Systems and other products for your 1984 Mercury Topazs. Below you’ll find some of our best rated Fuel and Emissions Systems from Bosch, FELPRO, and Carquest Premium, and more. Fuel and Emissions Systems from these brands that fit a 1984 Topaz start at just $3.99 and are rated as high as 4.7 stars. OEM and aftermarket Fuel and Emissions Systems don’t get more top quality, durable, and affordable than from the brands below.

Popular Bosch 1984 Mercury Topaz Fuel and Emissions Systems

When it comes to maintaining or upgrading your 1984 Mercury Topaz, using quality Fuel and Emissions Systems is essential to ensure durability and a perfect fit. Bosch ticks all of those boxes. We offer a wide selection of Bosch Fuel and Emissions Systems, specifically designed for the 1984 Mercury Topaz. With over 1 Bosch brand Fuel and Emissions Systems in stock, you’re sure to find what you need. The prices for these top-notch parts start as low as $39.99. Plus, with over 31 customer reviews and an average rating of 4.7 stars, you can trust that our Bosch Fuel and Emissions Systems will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.

from $39.99

(31)

Oxygen Sensor: 1 Wire, 5.31" Long, Non-heated, Universal Fit

“Been installed for a week. CEL is still off.”

Popular FELPRO 1984 Mercury Topaz Fuel and Emissions Systems

FELPRO auto parts is one of the highest quality Fuel and Emissions System brands in the market. Any 1984 Mercury Topaz owner should feel confident when installing genuine FELPRO parts in their vehicle. To ensure the best fit and performance for your 1984 Topaz, Advance Auto Parts carries a full inventory of 1 FELPRO Fuel and Emissions Systems. Plus you will be keeping your Mercury in peak condition while saving money because prices on these FELPRO Fuel and Emissions Systems range up to $3.99, plus, with more than 8 customer reviews and an impressive 4.6 stars average rating, you can be confident the Fram Fuel and Emissions Systems below will deliver on both quality and value.

from $3.99

(8)

Exhaust Gas Recirculation (EGR) Valve Gasket

“Perfect fit.”

FAQs for 1984 Mercury Topaz Fuel and Emissions Systems

Which Fuel and Emissions Systems are best-sellers for 1984 Mercury Topazs?

Out of 47 Fuel and Emissions Systems that fit 1984 Mercury Topazs, the following parts are the top sellers:

Fuel Cap: Round, Direct Fit, Provides Tight Seal, 1 Pack (18481528) – $14.99
Non-Locking Tethered Fuel Tank Cap (12102600) – $24.29
Fuel Tank Cleaning Kit (11692237) – $12.49

What’s the price range for 1984 Mercury Topaz Fuel and Emissions Systems?

Fuel and Emissions System prices for the 1984 Mercury Topaz start at $3.99 and go up to $103.99 for the most premium parts.

What’s the average price of a Fuel and Emissions System for a 1984 Mercury Topaz?

The average price for Fuel and Emissions Systems for the 1984 Mercury Topaz is $24.24. Keep in mind the variety of part types within our Fuel and Emissions System category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Fuel and Emissions Systems for other Mercury Topaz model years?

Yes, we currently carry Fuel and Emissions Systems for 9 model years of Mercury Topazs between 1985 and 1994. Fuel and Emissions Systems are bought most frequently for the following model years: 1994, 1993, 1992, 1991, 1990, 1989, 1988, 1987, and 1986.

What are the cheapest Fuel and Emissions Systems for my 1984 Mercury Topaz?

The cheapest 1984 Mercury Topaz Fuel and Emissions Systems we carry in stock are:

Exhaust Gas Recirculation (EGR) Valve Gasket (3208095) – $3.99
Exhaust Gas Recirculation (EGR) Valve Gasket (12481985) – $3.99
Exhaust Gas Recirculation (EGR) Valve Gasket (5181593) – $4.29
5/16 In. Fuel Line Retaining Clips (9110009) – $6.99
Keyed Alike Locking Fuel Cap (10069213) – $7.99

What are the top-rated Fuel and Emissions Systems that fit the 1984 Mercury Topaz?

Out of 893 reviews by customers, our 1984 Mercury Topaz Fuel and Emissions Systems have an average customer rating of . These are some of the highest-rated Fuel and Emissions System types for the 1984 Mercury Topaz and their top-rated products:

Oxygen Sensors
- Oxygen Sensor: 1 Wire, 5.31" Long, Non-heated, Universal Fit (3486079) – $39.99
Exhaust Gas Recirculation (EGR) Parts
- Oxygen Sensor: 1 Wire, 5.31" Long, Non-heated, Universal Fit (3486079) – $39.99

What types of Fuel and Emissions Systems do you sell for my 1984 Mercury Topaz?

As of 11/2/25, these are some of the most in-demand types of Fuel and Emissions Systems for a 1984 Mercury Topaz:

Can I get help with 1984 Mercury Topaz Fuel and Emissions System orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Mercury Fuel and Emissions Systems and more.

What is your return policy for Mercury Topaz Fuel and Emissions Systems?

Advance Auto Parts keeps returns simple. For new Mercury Topaz Fuel and Emissions Systems and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

1984 Mercury Topaz Fuel and Emissions Systems

Delphi – Fuel Tank Cleaning Kit (Part No.FC01)

Carquest Premium – Fuel Tank Lock Ring (Part No.LO1582930)

Dorman – Fuel Tank Vent Rollover Valve (Part No.911-060)

Bosch – Oxygen Sensor: 1 Wire, 5.31" Long, Non-heated, Universal Fit (Part No.11027)

Carquest Premium – Multi-Use Connector (Part No.PTA1662)

Carquest Premium – Secondary Air Injection Pump Check Valve (Part No.CVC1037)

Carquest Premium – Secondary Air Injection Pump Check Valve (Part No.CVC1006)

KAI – Fuel Tank Lock Ring (Part No.SPILO04)

Dorman – Help – Fuel Sending Unit Retainer Assortment (Part No.55812)

Dorman – Fuel Tank Vent Valve Seal Grommet (Part No.926-820)

Carquest Premium – Fuel Pump E260327 (Part No.E260327)

Bosch – Electric Fuel Pump, In-Tank (Part No.69128)

Dorman – Springlock Fuel Line Connector- 14mm x 5/16In. Barbed Male (Part No.800-131)

Dorman – Springlock Fuel Line Connector- 11mm x 5/16In. Barbed Male (Part No.800-130)

Carquest – Air Charge Temperature Sensor (Part No.31A1018)

NTK – Multi-Purpose Temperature Sensor (Part No.EF0016)

Felpro – Exhaust Gas Recirculation (EGR) Valve Gasket (Part No.70149)

Carquest Premium – Exhaust Gas Recirculation (EGR) Valve Gasket (Part No.EVA1027)

Carquest Premium – Non-Locking Fuel Tank Cap (Part No.10834)

Carquest Premium – Gas Cap: Twist On, Reduces Air Pollution, 1 Pack (Part No.10817)

Carquest Premium – Fuel Cap Tester Adapter: (Part No.12410)

Carquest Premium – Fuel Cap Tester Adapter: (Part No.12427)

Carquest Premium – Manifold Absolute Pressure Sensor (MAP) (Part No.ECE1016)

Delphi – Manifold Absolute Pressure Sensor (Part No.PS10242)

NTK – Manifold Absolute Pressure Sensor (Part No.MA0119)

Carquest Premium – Vapor Canister Purge Solenoid (Part No.CPA1037)

NTK – Manifold Absolute Pressure Sensor (Part No.MA0119)

Carquest Premium – Manifold Absolute Pressure Sensor (MAP) (Part No.ECE1016)

NTK – Multi-Purpose Temperature Sensor (Part No.EF0016)

Carquest Premium – Air Charge Temperature Sensor (Part No.WTA1083)

Carquest – Air Charge Temperature Sensor (Part No.31A1018)

Dorman – Fuel Pump Lock Ring (Part No.579-003)

Delphi – Fuel Tank Cleaning Kit (Part No.FC01)

Dorman – Fuel Tank Vent Rollover Valve (Part No.911-060)

Carquest Premium – Fuel Tank Lock Ring (Part No.LO1582930)

Carquest Premium – Fuel Tank Lock Ring (Part No.LO1511469)

KAI – Fuel Tank Lock Ring (Part No.SPILO04)

Dorman – Fuel Tank Vent Valve Seal Grommet (Part No.926-820)

Mr. Gasket – Electric Fuel Pump (Part No.12S)

KAI – Fuel Pump Module Assembly (Part No.FMD010083)

Carquest Premium – Fuel Cap Tester Adapter: (Part No.12427)

Carquest Premium – Fuel Cap Tester Adapter: (Part No.12410)

Carquest Premium – Diesel Fuel Cap: Screw On, Direct Fit, Provides Tight Seal, 1 Pack (Part No.10819D)

Carquest Premium – Keyed Alike Locking Fuel Cap (Part No.17591)

Carquest Premium – Keyed Alike Locking Fuel Cap (Part No.17591D)

Carquest Premium – Fuel Cap: Twist-Lock, Direct Fit, Provides Tight Seal, 1 Pack (Part No.10830)

Carquest Premium – Fuel Cap: Round, Direct Fit, Provides Tight Seal, 1 Pack (Part No.10837)

Carquest Premium – Non-Locking Fuel Tank Cap (Part No.10834)

Carquest Premium – Gas Cap: Twist On, Reduces Air Pollution, 1 Pack (Part No.10817)

Carquest Premium – Locking Fuel Tank Cap (Part No.10501)

Carquest Premium – Non-Locking Fuel Tank Cap (Part No.10819)

Carquest Premium – Locking Fuel Tank Cap (Part No.10591)

Carquest Premium – Locking Fuel Cap: Screw On, Direct Fit, Provides Tight Seal, 1 Pack (Part No.10591D)

Carquest Premium – Locking Fuel Cap: Screw On, Direct Fit, Provides Tight Seal, 1 Pack (Part No.10504)

Carquest Premium – Locking Fuel Tank Cap (Part No.10507)

Carquest Premium – Diesel Fuel Cap: Screw On, Direct Fit, Provides Tight Seal, 1 Pack (Part No.10830D)

Carquest Premium – Keyed Alike Locking Fuel Cap (Part No.17504)

Carquest Premium – Locking Diesel Fuel Tank Cap (Part No.10501D)

Motorad – Non-Locking Tethered Fuel Tank Cap (Part No.MGC817T)

Carquest Premium – Keyed Alike Locking Fuel Cap (Part No.17507)

Carquest Premium – Locking Fuel Cap: Screw On, Direct Fit, Provides Tight Seal, 1 Pack (Part No.17501D)

Motorad – Locking Tethered Diesel Fuel Tank Cap (Part No.MGC517T)

Carquest Premium – Keyed Alike Locking Fuel Cap (Part No.17505)

Bosch – Oxygen Sensor: 1 Wire, 5.31" Long, Non-heated, Universal Fit (Part No.11027)