2021 Subaru WRX STI Engine Parts

Name: Multi-Purpose O-Ring
Brand: Felpro
SKU: 71857
Price: 4.99 USD

Below you will find various in-demand Subaru Engine Parts, components and accessories for your 2021 WRX STI. Advance Auto Parts has popular WRX STI parts like Camshafts, Engine Timing Parts, Engine Mounts and more. You’ll also find aftermarket and OEM Engine Parts for other WRX STI model years including 2015, 2016, 2017, 2018, 2019, 2020 and more. Select a category of 2021 Subaru WRX STI Engine Parts below and start saving instantly.

Please Select your Vehicle to See Exact Fit Parts

Popular 2021 Subaru WRX STI Engine Parts Categories

Engine Variable Timing Solenoids

Valve Cover Gaskets

Turbochargers and Parts

Oil Pan Gaskets

Camshaft Position Sensors

OE Engine Oil Coolers

Crankshaft Position Sensors

Harmonic Balancers

Engine Mounts

Oil Pans

Engine Oil Cooler Accessories

Turbocharger Coolant Lines

Engine Control Module Relays

Fuel Pump Gaskets

Essential Engine Parts for 2021 Subaru WRX STIs

from

$4.99

Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust.

Product Features:

Meets or exceeds all original equipment specifications
Design to ensure a perfect fit
Engineered and manufactured specifically for the repair environment
Unsurpassed quality you can trust
Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes

from

$12.49

This turbocharger coolant line is designed to match the fit and function of the original line on specified vehicles. Made of quality materials, it is engineered for reliable performance and durability.

Product Features:

Direct replacement – this turbocharger coolant line is designed to match the fit and function of the original line on specified vehicles
Ideal solution – this coolant line is a reliable replacement for a leaking or failed original line
Durable construction – made from quality components to ensure reliable performance and long service life
Quality assured – backed by a team of product engineers based in the United States

from

$122.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial Econo-Kool« engine oil cooler kit
Imperial Econo-Kool® engine oil cooler kit
Lightweight construction with high-efficiency turbulators
Light-duty applications
All except Chevrolet V8 applications
Size: 3/4 in. x 7-1/2 in. x 12-1/2 in.

from

$248.99

Our products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile a/c experience, fix it once and fix it right with Imperial.

Product Features:

Imperial Swirl-Cool engine oil cooler kit
Size: 1-1/2″ x 6-1/2″ x 18″
Heavy-duty applications
All except Chevrolet V8 applications
Universal Cooler, NOT a direct OE replacement. User to determine fitment prior to installation
Heavy duty applications
All except Chevrolet V8 applications
Universal Cooler, NOT a direct OE replacement. User to determine fitment prior to installation
Heavy duty applications
All except Chevrolet V8 applications

from

$20.99

Relay

Product Features:

Lifecycle lasts up to 10 times longer than the competitor’s
Flux free micro arc welding versus competitors that solder
High conductive material that does not corrode
Shortest path for the electrical current improves efficiency
Offered by world’s largest relay manufacturer

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$11.99

Product Features:

Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
Cork rubber construction
Compliant to a wide range of surface conditions
Dana engineering-approved for fit, form and function

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$10.49

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:

DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
ENGINEERED TO PERFORM – Proprietary cork-rubber formulation
SUPERIOR SEAL – Highly conformable to accommodate for the imperfect sealing surfaces
EVERY PART FOR THE REPAIR – Fel-Pro gasket sets include every part needed for the repair unless otherwise noted
REAL WORLD TESTED – Parts are tested on-vehicle and validated to ensure optimal performance on the road

from

$783.99

Rotomaster Remanufactured Turbochargers are built to meet Original Equipment (OE) standards for fit, function, and performance across a wide range of vehicles. Each turbocharger is fully disassembled, meticulously inspected, and thoroughly cleaned to restore like-new performance. It then undergoes Triple Balance Processing, a vital step that ensures precise calibration for smooth, reliable operation, meeting the same rigorous standards as a new turbocharger. This thorough process guarantees consistent power, enhanced fuel efficiency, and long-lasting durability, making Rotomaster reman turbochargers a trusted and reliable choice for vehicle owners. As specialists in turbochargers, Rotomaster brings superior expertise to every unit. Their on-call technical support team is ready to help with installation, troubleshooting, and product selection so you can stay up and running with confidence. Protected by an industry-leading warranty for your peace of mind.

Product Features:

Full Component Replacement: 100% of rotating, journal, and thrust bearings, as well as seals, are replaced. All mating surfaces and internal passages are renewed.
Thorough Inspection: Each component is inspected to strict OE-level standards. Guarantees that every turbocharger meets high-quality standards for optimal performance and reliability.
Built to Fit Right: All wheels, shafts, and bores are accurately measured renewed or replaced. Ensures smooth, reliable operation for maximum efficiency for all environments.
Built to OE Spec: Each remanufactured turbocharger is built to match original equipment specifications. Provides a precise fit and seamless installation, reducing installation time and effort.
Installation Ready: Each turbocharger comes complete with a pre-lube syringe to protect internal components during initial start-up, promoting a smoother, safer installation.
Specialized Cleaning: Fully disassembled and cleaned using advanced equipment and processes. Restores like-new performance and reliability, ensuring consistent operation over time.
Our remanufacturing process is earth-friendly, as it reduces the energy and raw material needed to make a new part by 80%.
Meets or exceeds O.E. performance.
Comes with a pre-lube syringe to ensure product protection during installation.

from

$6.49

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 and manufactured specifically for the repair environment
Unsurpassed quality you can trust
Includes all parts needed to complete the repair

from

$73.99

Innovative engineering, manufacturing technology and quality control ensure that Spectra Premium oil pans meet or exceed the performance of the original equipment they replace.

Product Features:

Unit is designed to OE fit, form and function requirements accomplished by leveraging our OE expertise
Durable powder coating applied to exterior of oil pan for a long lasting rust free unit
Washed and then sealed with an anti-corrosive spray on the interior for a rust free unit at installation
Fit tested on the very same vehicle application for which it was developed verifying first-hand that the design fits properly and can be easily installed
Engineered to stringent tolerances based on our Canadian engineers’ in-depth knowledge of the OE part it’s designed to replace
Road tested to ensure real world performance and to verify that each design meets our high standards for quality
Coating salt spray tested for over 200 hours to insure durability

from

$73.99

This engine oil pan is precision-engineered to match the original equipment pan on specific vehicle years, makes and models for a reliable replacement.

Product Features:

Direct replacement – this engine oil pan is made to match the original pan on specific vehicles
Complete assembly – includes replacement pan and drain plugs to match original components
Durable design – high-strength coating prevents future corrosion
Trustworthy value – backed by team of engineers and quality control experts in the United States

from

$134.99

This direct replacement harmonic balancer features a stress-resistant rubber bond to properly absorb engine vibration. Stringent standards help ensure excellent tensile and impact strength for greater durability.

Product Features:

Ideal replacement – this harmonic balancer assembly exactly matches the fit and function of the original harmonic balancer for a direct replacement
Durable construction – stringent specifications and careful construction help ensure longevity
Thoroughly tested – this harmonic balancer has undergone dimensional verification, material validation and functional testing
Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience

from

$83.99

For use on the most popular passenger car, light commercial and four-wheel drive applications, Dayco harmonic balancers use special rubber compounds to dampen and remove engine harmonics and add to engine performance. Manufactured using a premium ductile iron casting and injection bonded dampening rubber, Dayco harmonic balancers offer engine builders and technicians the highest quality replacement to standard OEM balancers, which are typically made with press inserted dampening rubber. Dayco balancers utilize both inserted and pressure-bonded rubber to provide superior bonding strength between the inner and outer balancer rings, helping minimize spin and dislocation.

Product Features:

Designed as premium OEM replacement balancers for serpentine and V-belt drives
Manufactured with ductile iron casting and injection bonded dampening rubber
Engineered to offer superior bonding strength between the balancer rings

from

$156.99

The variable valve timing (VVT) system allows the engine control module (ECM) to regulate the intake and exhaust valve phase angle providing the most optimal engine volumetric efficiency under all engine operating condition to control tailpipe emissions and engine efficiency. Variable valve timing is an emission control device and although there are various methods of operation, the typical device is regulated by oil control valves, actuator solenoids and camshaft phasers.

Product Features:

Precision-wound coated copper windings increase product durability and life cycle.
Hard-coated and anodized spool valve to prevent corrosion and increase service life.
Threaded mounting bolt, hardware, and/or gaskets where applicable for easy installation.
Thermoplastic that is resistant to high temperatures, moisture, and chemicals.
100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
100% end-of-line tested to ensure product reliability, every time.
Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.

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$56.99

A leader in vehicle electronic solutions, each premium product meets or exceeds OE specifications in appearance, fit, and function, ensuring easy installation and excellent performance. The product has been tested under extreme environments.

Product Features:

Reliable circuit board and product structure design, 3D proofing, and field test verification to ensure correct signal output at all speeds.
Manufactured in an anti-static environment to ensure reliability and stability.
Extreme temperature and salt spray tests simulate real-world vehicle conditions to ensure durability and reliability.
Providing this premium product line, we meet the service professionals needs with the highest quality product every time the part comes out of the box.

from

$74.99

Carquest Premium camshaft position sensors are designed to perform in harsh engine environments and meet or exceed original equipment (O.E.) specifications. Carquest Premium crankshaft and camshaft sensors are engineered with technology that provides increased output accuracy through a stronger, more consistent signal. Our sensors are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. Carquest Premium crankshaft and camshaft position sensors undergo extensive validation testing to ensure long-lasting performance and reliability. Carquest Premium sensors are part of our Carquest Vehicle Solutions, which is a full line of engine management and electronics products that help control ignition, fuel delivery and emission systems. Carquest Vehicle Solutions are OE-quality parts designed, engineered and tested by world-class manufacturers to ensure a reliable and long-lasting repair.

Product Features:

Engineered with technology that provides increased accuracy with a stronger, more consistent signal
Sensors are based on proven hall effect and variable reluctance technology
Includes OE-style brackets, hold downs, hardware, or spacers as needed for each application.
O-rings and seals are included if required.
Weather-tight connectors prevent leaks and corrosion for better reliability.
Extensive design validation testing and 100% end-of-line tested.
Carquest Vehicle Solutions Technical Support available from ASE certified technicians: 1-866-687-5413

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$74.99

Engine Camshaft Position Sensors are used by the engine control module to synchronize the pulsing of sequential fuel injectors so they match the firing order of the engine. Dorman Engine Crankshaft Position Sensors have undergone extensive vehicle try-on and durability testing to ensure strength, fitment and longevity.

Product Features:

Sensor electronics sealed to resist fluid damage and corrosion
Durable plastic construction
Manufactured to strict engineering quality standards
No special tools required

from

$113.99

Carquest Premium crankshaft position sensors are designed to perform in harsh engine environments and meet or exceed original equipment (O.E.) specifications. Carquest Premium crankshaft and camshaft sensors are engineered with technology that provides increased output accuracy through a stronger, more consistent signal. Our sensors are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. Carquest Premium crankshaft and camshaft position sensors undergo extensive validation testing to ensure long-lasting performance and reliability. Carquest Premium sensors are part of our Carquest Vehicle Solutions, which is a full line of engine management and electronics products that help control ignition, fuel delivery and emission systems. Carquest Vehicle Solutions are OE-quality parts designed, engineered and tested by world-class manufacturers to ensure a reliable and long-lasting repair.

Product Features:

Engineered with technology that provides increased accuracy with a stronger, more consistent signal
Sensors are based on proven hall effect and variable reluctance technology
Includes OE-style brackets, hold downs, hardware, or spacers as needed for each application.
O-rings and seals are included if required.
Weather-tight connectors prevent leaks and corrosion for better reliability.
Extensive design validation testing and 100% end-of-line tested.
Carquest Vehicle Solutions Technical Support available from ASE certified technicians: 1-866-687-5413

from

$68.99

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:

The sensors provide accurate readings from the gap between sensor contact and element due to its design
Manufactured to meet or exceed OE requirements
Enhanced sensing functionality helps reduce emissions, improve reliability and drivability
Not impacted by temperature changes and provide robust, long-lasting sensor protection
Designed digital output for maximum signal to noise ratio

from

$36.99

Reliable circuit board and product structure design, 3D proofing, and field test verification to ensure correct signal output at all speeds.
Manufactured in an anti-static environment to ensure reliability and stability.
Extreme temperature and salt spray tests simulate real-world vehicle conditions to ensure durability and reliability.
Providing this premium product line, we meet the service professionals needs with the highest quality product every time the part comes out of the box.

from

$98.99

Subaru designed the pitch stop mount to assist in controlling the engine and drivetrain forward and aft twisting motion. The pitch stop is inherently soft due to the plastic body and high compliance rubber bushing design and was built for comfort and not responsiveness or feel. Whiteline’s Billet 6061-T6 aluminum pitch stop mounting is built to handle the demands of high torque and power output engines by limiting the amount of movement the engine and drivetrain will place upon the pitch stop. Utilising low compliance bushing technology this eliminates the slop, twisting and shudder found in the OEM rubber bushings allowing for a faster, positive, responsive feel of power delivery on and off the throttle.

Product Features:

Featuring premium anodized alloy materials, Whiteline alloy products are anodized providing a long-lasting protective barrier to corrosion and wear but they look great too.
Featuring premium anodized alloy materials, Whiteline alloy products are anodized providing a long-lasting protective barrier to corrosion and wear but they look great too.
Install guide included providing detailed instructions on how to install your new Whiteline purchase.

from

$24.99

Billet 6061-T6 aluminum pitch stop mounting is built to handle the demands of high torque and power output engines by limiting the amount of movement the engine and drivetrain will place upon the pitch stop. Utilising low compliance bushing technology this eliminates the slop, twisting and shudder found in the OEM rubber bushings allowing for a faster, positive, responsive feel of power delivery on and off the throttle.

Product Features:

Protective plating on all metal components acts as a hard skin that is much tougher than conventional paint allowing this product to withstand the toughest conditions and resist corrosion for years to come.
Whiteline’s latest technology synthetic elastomer formulation boasts resistance to oil, grease, ozone and weathering.
Designed with the installer in mind by reducing the need of specialised skills, tools and equipment.
Inserts are designed to work with the original factory bushing rather than replacing it.

from

$52.99

Anchor 9023 This mount supports the engine and dampen vibration. Each mount is specifically engineered and designed to OE standards. Natural and SBR rubber provide maximum life and performance. Steel fasteners are heat treated grade 5 bolts. A special bonding agent is used to ensure a rubber to metal bond. Rubber material is mixed to specific Durometer, hardness.

Product Features:

MAXIMUM LIFE & PERFORMANCE: Both natural and SBR (Styrene Butadiene) rubber provide good abrasion resistance and aging stability to ensure maximum life and performance.
MEETS OR EXCEEDS DUROMETER MEASUREMENTS: All rubber material is manufactured to specific Durometer (hardness) measurements based on the vehicle’s application requirements.
HARDENED STEEL FASTENERS: All fasteners are made of hardened steel with heat treated Grade #5 bolts.
SUPERIOR BOND: A special Chemlok bonding agent is used to ensure a superior rubber-to-metal bond.
HYDRAULIC MOUNT DESIGN: Hydraulic Mounts (applicable where OE) are designed for most front wheel drive vehicles because transverse drive train mounting.
For Years: 1995-2019
Weight approx: 3 Lbs

from

$61.99

Product Features:

Choosing Victor Reinz assures getting OE quality parts in gaskets sets that have the coverage, contents, packaging and electronic cataloging to best meet the needs of the aftermarket.
Application specific molded rubber construction
Engineered cross section
Includes all components required to complete the repair

from

$52.99

Product Features:

DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
ENGINEERED TO PERFORM – Proprietary cork-rubber formulation
SUPERIOR SEAL – Highly conformable to accommodate for the imperfect sealing surfaces
EVERY PART FOR THE REPAIR – Fel-Pro gasket sets include every part needed for the repair unless otherwise noted
REAL WORLD TESTED – Parts are tested on-vehicle and validated to ensure optimal performance on the road

Upgrade your 2021 Subaru WRX STI with Top-Quality Engine Parts

When it comes to maintaining or upgrading your 2021 Subaru WRX STI, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Subaru or enhancing its overall performance, Engine Parts are key to keeping your WRX STI functioning at its best. At Advance Auto Parts, we offer a wide selection of 18 Engine Parts for the 2021 Subaru WRX STI, designed to meet your needs without breaking the bank. From Camshaft replacements to Engine Timing Parts 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 Engine Parts for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Engine Parts for your 2021 Subaru WRX STI at great prices. Our Engine Parts inventory for this model ranges from just $4.99 to $783.99, with an average price of $113.91. Our 18 Engine Parts in stock come from 10 trusted brands, so you’re sure to find the right part for your 2021 Subaru WRX STI 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 2021 Subaru WRX STI, we stock popular OEM and aftermarket Engine Parts from top names like Felpro, and more. Felpro Engine Parts start at just $10.49 and boast an impressive 4.6 stars average rating from customers. With 66 customer reviews and counting, our 2021 Subaru WRX STI Engine Parts 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 Engine Part upgrades. Explore related part types like Batteries and Chargers, Oil and Lubricants and more to make sure your 2021 Subaru WRX STI is always ready to roll. We’re committed to providing you with everything you need to keep your WRX STI in top shape, all in one place. Start shopping confidently below for your 2021 Subaru WRX STI!

Best-Selling Camshafts for 2021 Subaru WRX STIs

Enhance the driving experience in your Subaru with 3 quality Camshaft components, starting at $56.99.

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from

$56.99

Reliable circuit board and product structure design, 3D proofing, and field test verification to ensure correct signal output at all speeds.
Manufactured in an anti-static environment to ensure reliability and stability.
Extreme temperature and salt spray tests simulate real-world vehicle conditions to ensure durability and reliability.
Providing this premium product line, we meet the service professionals needs with the highest quality product every time the part comes out of the box.

from

$105.99

Engineered with technology that provides increased accuracy with a stronger, more consistent signal
Sensors are based on proven hall effect and variable reluctance technology
Includes OE-style brackets, hold downs, hardware, or spacers as needed for each application.
O-rings and seals are included if required.
Weather-tight connectors prevent leaks and corrosion for better reliability.
Extensive design validation testing and 100% end-of-line tested.
Carquest Vehicle Solutions Technical Support available from ASE certified technicians: 1-866-687-5413

from

$74.99

Engineered with technology that provides increased accuracy with a stronger, more consistent signal
Sensors are based on proven hall effect and variable reluctance technology
Includes OE-style brackets, hold downs, hardware, or spacers as needed for each application.
O-rings and seals are included if required.
Weather-tight connectors prevent leaks and corrosion for better reliability.
Extensive design validation testing and 100% end-of-line tested.
Carquest Vehicle Solutions Technical Support available from ASE certified technicians: 1-866-687-5413

Top Picks for 2021 Subaru WRX STI Engine Mounts

Upgrade Subaru WRX STIs with top-quality Engine Mounts parts, including 2 OEM and aftermarket selections for your 2021 model.

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from

$52.99

MAXIMUM LIFE & PERFORMANCE: Both natural and SBR (Styrene Butadiene) rubber provide good abrasion resistance and aging stability to ensure maximum life and performance.
MEETS OR EXCEEDS DUROMETER MEASUREMENTS: All rubber material is manufactured to specific Durometer (hardness) measurements based on the vehicle’s application requirements.
HARDENED STEEL FASTENERS: All fasteners are made of hardened steel with heat treated Grade #5 bolts.
SUPERIOR BOND: A special Chemlok bonding agent is used to ensure a superior rubber-to-metal bond.
HYDRAULIC MOUNT DESIGN: Hydraulic Mounts (applicable where OE) are designed for most front wheel drive vehicles because transverse drive train mounting.
For Years: 1995-2019
Weight approx: 3 Lbs

from

$98.99

Featuring premium anodized alloy materials, Whiteline alloy products are anodized providing a long-lasting protective barrier to corrosion and wear but they look great too.
Featuring premium anodized alloy materials, Whiteline alloy products are anodized providing a long-lasting protective barrier to corrosion and wear but they look great too.
Install guide included providing detailed instructions on how to install your new Whiteline purchase.

In-Demand Engine Gaskets and Seals for 2021 Subaru WRX STIs

Select from 3 premium Engine Gaskets and Seals parts for your 2021 Subaru WRX STI, with prices ranging from $4.99 to $52.99.

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from

$52.99

Product Features:

DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
ENGINEERED TO PERFORM – Proprietary cork-rubber formulation
SUPERIOR SEAL – Highly conformable to accommodate for the imperfect sealing surfaces
EVERY PART FOR THE REPAIR – Fel-Pro gasket sets include every part needed for the repair unless otherwise noted
REAL WORLD TESTED – Parts are tested on-vehicle and validated to ensure optimal performance on the road

from

$10.49

DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
ENGINEERED TO PERFORM – Proprietary cork-rubber formulation
SUPERIOR SEAL – Highly conformable to accommodate for the imperfect sealing surfaces
EVERY PART FOR THE REPAIR – Fel-Pro gasket sets include every part needed for the repair unless otherwise noted
REAL WORLD TESTED – Parts are tested on-vehicle and validated to ensure optimal performance on the road

from

$4.99

Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust.

Product Features:

Meets or exceeds all original equipment specifications
Design to ensure a perfect fit
Engineered and manufactured specifically for the repair environment
Unsurpassed quality you can trust
Each Fel-Pro gasket, no matter how small, is engineered to exacting standards with proprietary design, engineering and manufacturing processes

Most Sold 2021 Subaru WRX STI Engine Switches, Sensors and Relays

Explore our best-selling Subaru parts for the 2021 WRX STI among 2 OEM and aftermarket options starting from $36.99.

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from

$36.99

Reliable circuit board and product structure design, 3D proofing, and field test verification to ensure correct signal output at all speeds.
Manufactured in an anti-static environment to ensure reliability and stability.
Extreme temperature and salt spray tests simulate real-world vehicle conditions to ensure durability and reliability.
Providing this premium product line, we meet the service professionals needs with the highest quality product every time the part comes out of the box.

from

$68.99

The sensors provide accurate readings from the gap between sensor contact and element due to its design
Manufactured to meet or exceed OE requirements
Enhanced sensing functionality helps reduce emissions, improve reliability and drivability
Not impacted by temperature changes and provide robust, long-lasting sensor protection
Designed digital output for maximum signal to noise ratio

Top-Rated Engine Parts Brands For Your 2021 Subaru WRX STI

Shop for the best-rated brands offering Engine Parts and other products for your 2021 Subaru WRX STIs. Below you’ll find some of our best rated Engine Parts from Felpro, and more. Engine Parts from these brands that fit a 2021 WRX STI start at just $10.49 and are rated as high as 4.6 stars. OEM and aftermarket Engine Parts don’t get more top quality, durable, and affordable than from the brands below.

Popular Felpro 2021 Subaru WRX STI Engine Parts

When it comes to maintaining or upgrading your 2021 Subaru WRX STI, using quality Engine Parts is essential to ensure durability and a perfect fit. Felpro ticks all of those boxes. We offer a wide selection of Felpro Engine Parts, specifically designed for the 2021 Subaru WRX STI. With over 2 Felpro brand Engine Parts in stock, you’re sure to find what you need. The prices for these top-notch parts start as low as $10.49, with an average price of just $31.74. Plus, with over 11 customer reviews and an average rating of 4.6 stars, you can trust that our Felpro Engine Parts will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.

from $52.99

(2)

VALVE COVER GASKET SET

“Stopped the oil leak…”

from $10.49

(9)

Engine Oil Pan Gasket Set – Blue Stripe cork-rubber

“Isn’t leaking yet, 1000 miles in”

FAQs for 2021 Subaru WRX STI Engine Parts

Which Engine Parts are best-sellers for 2021 Subaru WRX STIs?

Out of 18 Engine Parts that fit 2021 Subaru WRX STIs, the following parts are the top sellers:

Crankshaft Sensor (12351861) – $36.99
Engine Oil Pan (10723689) – $73.99
Relay (10129603) – $20.99

What’s the price range for 2021 Subaru WRX STI Engine Parts?

Engine Part prices for the 2021 Subaru WRX STI start at $4.99 and go up to $783.99 for the most premium parts.

What’s the average price of a Engine Part for a 2021 Subaru WRX STI?

The average price for Engine Parts for the 2021 Subaru WRX STI is $113.91. Keep in mind the variety of part types within our Engine Part category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Engine Parts for other Subaru WRX STI model years?

Yes, we currently carry Engine Parts for 5 model years of Subaru WRX STIs between 2015 and 2020. Engine Parts are bought most frequently for the following model years: 2020, 2019, 2018, 2017, 2016, and 2015.

What are the cheapest Engine Parts for my 2021 Subaru WRX STI?

The cheapest 2021 Subaru WRX STI Engine Parts we carry in stock are:

Multi-Purpose O-Ring (12005668) – $4.99
Engine Oil Cooler Seal (10854594) – $6.49
Engine Oil Pan Gasket Set – Blue Stripe cork-rubber (3502899) – $10.49
Turbocharger Coolant Inlet Hose (50072494) – $12.49
Relay (10129603) – $20.99

What are the top-rated Engine Parts that fit the 2021 Subaru WRX STI?

Out of 66 reviews by customers, our 2021 Subaru WRX STI Engine Parts have an average customer rating of . These are some of the highest-rated Engine Part types for the 2021 Subaru WRX STI and their top-rated products:

Engine Gaskets and Seals
- VALVE COVER GASKET SET (20688857) – $52.99
- Engine Oil Pan Gasket Set – Blue Stripe cork-rubber (3502899) – $10.49

What types of Engine Parts do you sell for my 2021 Subaru WRX STI?

As of 3/1/26, these are some of the most in-demand types of Engine Parts for a 2021 Subaru WRX STI:

Can I get help with 2021 Subaru WRX STI Engine Part orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Subaru Engine Parts and more.

What is your return policy for Subaru WRX STI Engine Parts?

Advance Auto Parts keeps returns simple. For new Subaru WRX STI Engine Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.

2021 Subaru WRX STI Engine Parts

Felpro – Multi-Purpose O-Ring (Part No.71857)

Dorman – Turbocharger Coolant Inlet Hose (Part No.904-389)

Imperial – Econo-Kool® Engine Oil Cooler (Part No.240459)

Imperial – Engine Oil Cooler (Part No.241040)

DENSO – Relay (Part No.567-0003)

Victor Reinz – Engine Oil Pan Gasket Set (Part No.71-52946-00)

Felpro – Engine Oil Pan Gasket Set – Blue Stripe cork-rubber (Part No.OS 30656 C)

Rotomaster – Rotomaster (Part No.J8550102R)

Felpro – Engine Oil Cooler Seal (Part No.72493)

Spectra Premium – Engine Oil Pan (Part No.SUP04A)

Dorman – Engine Oil Pan: Direct Fit, Steel, Sump (Part No.264-364)

Dorman – Harmonic Balancer Assembly (Part No.594-166)

PowerBond – Premium OEM Replacement Harmonic Balancer; 133mm Diameter (Part No.PB1165N)

Carquest Premium – Engine Variable Valve Timing (VVT) Solenoid (Part No.VVA1137)

Carquest Premium – Camshaft Sensor (Part No.CSC1382)

Carquest Premium – Engine Camshaft Position Sensor (Part No.CSA3989)

Dorman – Camshaft Position Sensor (Part No.907-847)

Carquest Premium – Engine Crankshaft Position Sensor (Part No.CSA1599)

Delphi – Engine Camshaft Position Sensor (Part No.SS10815)

Carquest Premium – Crankshaft Sensor (Part No.CSC1104)

Whiteline – Engine Pitch Stop Mount (Part No.KBR39)

Whiteline – Engine Pitch Mount Bushing Kit (Part No.W92832)

Anchor – Engine Mount: Front Left, Front Right, 1 Piece (Part No.9023)

Victor Reinz – Engine Valve Cover Gasket Set (Part No.15-10874-01)

Felpro – VALVE COVER GASKET SET (Part No.VS 50620 R)

Carquest Premium – Camshaft Sensor (Part No.CSC1382)

Carquest Premium – Engine Camshaft Position Sensor (Part No.CSA3762)

Carquest Premium – Engine Camshaft Position Sensor (Part No.CSA3989)

Carquest Premium – Engine Variable Valve Timing (VVT) Solenoid (Part No.VVA1137)

Anchor – Engine Mount: Front Left, Front Right, 1 Piece (Part No.9023)

Whiteline – Engine Pitch Stop Mount (Part No.KBR39)

Felpro – VALVE COVER GASKET SET (Part No.VS 50620 R)

Felpro – Engine Oil Pan Gasket Set – Blue Stripe cork-rubber (Part No.OS 30656 C)

Felpro – Multi-Purpose O-Ring (Part No.71857)

Carquest Premium – Crankshaft Sensor (Part No.CSC1104)

Delphi – Engine Camshaft Position Sensor (Part No.SS10815)