1991 BMW 525i Ignition and Tune-Up Products

Essential 1991 BMW 525i Ignition and Tune-Up Products

Carquest Premium – Coil On Plug Insulator Boot: Spring included, Designed for direct fit (Part No.35-7030)

Coil On Plug Insulator Boot: Spring included, Designed for direct fit

from

$4.99
CARQUEST Premium coil on plug boots are engineered to restore ignition boot reliability and performance. We have OE design providing an exact direct fit for your application and the performance and durability meet or exceed OE requirements. It offers excellent heat resistance as well as maximum protection against spark loss. With durable silicone compound for resistance to high heat or abrasion.

Product Features:
  • Provides excellent heat resistance as well as maximum protection against spark loss.
  • Durable silicone compound for resistance to high heat or abrasion
  • Spring included with the coil boot
  • Design for direct compatibility
  • OE design provides an exact fit for your application
  • Multipack provides one time replace all COP for better deal
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Bosch – Spark Plug Connector (Part No.F10101700242BOS)

Spark Plug Connector

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$21.69
Long recognized as an industry leader in ignition and fuel systems, Bosch’s quality, innovation, and experience are the foundation of the entire line of engine management components.

Product Features:
  • Meets or exceeds OEM specifications
  • Manufactured of the highest quality materials
  • Guaranteed fit and function
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NGK – Coil on Plug Boot (Part No.58925)

Coil on Plug Boot

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$40.99
NGK Coil on Plug Boots are built to stringent OEM tolerances, combining original equipment fit, design and outstanding durability. NGK Coil on Plug Boots are manufactured using only premium silicone and always include any required internal springs and ferrite resistors for superior performance and RFI noise suppression. Bridging the important link between ignition coil and spark plug, COP boots should always be replaced with NGK Coil on Plug Boots at the time as changing spark plugs to prevent ignition problems such as flashover.

Product Features:
  • PREMIUM GRADE SILICONE: Designed to withstand harsh environments
  • OEM MATCHED: Includes all required internal springs and ferrite resistors for superior performance and RFI noise suppression
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Suncore – Air Bag (Part No.254BW-15-RL)

Air Bag

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$94.99
Air Bag

Idemitsu – Power Steering Fluid – 12 oz (Part No.30102-052A)

Power Steering Fluid - 12 oz

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$6.29
IDEMITSU Premium PSF is specifically engineered to meet the demanding performance requirements of Honda and Acura power steering units. This advanced technology fluid is formulated with premium quality base oils and the latest additive technologies to provide outstanding protection and performance under the most servere environmental and driving conditions.IDEMITSU Premium PSF can also be used in most Asian Original Equipment Manufacturer (OEM) power steering units that do not utilize electronic power steering technology.

Product Features:
  • Unique friction technology provides efficient and noise-free operation
  • Advanced formulation technology provides outstanding protection to the entire power steering system while delivering smooth performance under the most severe operating conditions
  • Superior low temperature performance for easy flow and protection against cavitation and elimination of “squawking” and “squealing”
  • Excellent compatibility with seals, gaskets and internal components to reduce the potential for leaks and ensures smooth performance over extended intervals
  • Robust anti-wear and inhibitor chemistry provides enhanced component and fluid durability and long-life
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Suncore – SuspAirBag/Bellows (Part No.255BW-15-RR)

SuspAirBag/Bellows

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$94.99
SuspAirBag/Bellows

Carquest Premium – Ignition Switch (Part No.CSC1516)

Ignition Switch

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$87.99
CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.
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Carquest Premium – Ignition Switch (Part No.CSA3194)

Ignition Switch

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$194.99
CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.
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Febi – Ignition Switch (Part No.M5050185933FEB)

Ignition Switch

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$76.62
Ignition Switch

DENSO – Coil On Plug Boots-6 (Part No.671-6241)

Coil On Plug Boots-6

from

$226.99
DENSO First Time Fit COP boot sets are identical in form fit color and performance to the factory-installed boots. Every part of each COP boot set construction meets or exceeds OE/OES standards.

Product Features:
  • OE design ensures a tight boot seal that protects against moisture intrusion
  • High temperature resistant material provides greater protection against thermal overload
  • Stainless steel internal spring with resistor to suppress RFI and deliver maximum voltage to the plug
  • Engineered to the specifications used by the original vehicle manufacturer for an exact fit
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NGK – Iridium IX Spark Plug: Single Iridium Fine Wire, BKR6EIX (Part No.6418)

Iridium IX Spark Plug: Single Iridium Fine Wire, BKR6EIX

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$11.99
NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode’s durability is six times harder than platinum. Iridium alloy’s extremely high melting point is perfect for today’s engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.

Product Features:
  • SINGLE IRIDIUM TIP: Fine wire 0.6 millimeter iridium tip center electrode ensures high durability and a consistently stable spark
  • IRIDIUM ALLOY CENTER ELECTRODE: Iridium’s density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
  • TAPERED CUT GROUND ELECTRODE: Reduced quenching design produces outstanding ignitability, improved acceleration, fuel efficiency and durability
  • SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
  • TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
  • RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
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NGK – OE Series V-Power Nickel Spark Plug: V-Groove Tip Design, BKR6E (Part No.6962)

OE Series V-Power Nickel Spark Plug: V-Groove Tip Design, BKR6E

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$4.99
NGK V-Power spark plugs offer reliable performance and improved ignitability over standard nickel plugs. Engineered specifically for OE applications, the special V-cut nickel alloy center electrode and concave ground electrode of NGK’s V-Power spark plug

Product Features:
  • ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction nickel alloy center electrode with V-groove provides consistent performance
  • RECOMMENDED USAGE: Best for vehicles with OE nickel alloy plugs, not recommended on vehicles with factory precious metal plugs
  • NGK’s OE CERAMIC TECHNOLOGY: High grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance
  • SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
  • COLD-ROLLED THREADS: Prevents cross-threading and damage to cylinder heads
  • TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
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Autolite – Double Platinum Spark Plug: Platinum Firing, Superior Durability, Longer Life (Part No.APP3923)

Double Platinum Spark Plug: Platinum Firing, Superior Durability, Longer Life

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$6.79
With over 100 years of engineering expertise and over 11 billion plugs sold, Autolite delivers exceptional quality. Designed and engineered in the USA, these spark plugs feature platinum-to-platinum firing, virtually eliminating gap erosion and reducing misfires. The OE design and full-platinum tips on both the center and side electrodes ensure reduced gap wear, while the platinum ball welding process provides a consistent point of contact for enhanced adhesion. This results in optimized engine performance, longer life, and improved fuel economy. The gasket seat type further enhances the plug’s reliability and durability.

Product Features:
  • Works to optimize engine performance for a longer life and improved fuel economy
  • OE design
  • Full-platinum tips; platinum on both the center and side electrodes to promote reduced gap wear
  • Platinum ball welding process provides a consistent point of contact for enhanced adhesion
  • Gasket Seat Type: Equipped with a gasket seat type that enhances the spark plug’s reliability and durability.
  • Proven Quality: Backed by over 100 years of engineering expertise and over 11 billion plugs sold, Autolite delivers exceptional quality and performance.
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Champion – Copper Plus Spark Plug: Dependable Performance, OE Replacement, RN12YC (Part No.404)

Copper Plus Spark Plug: Dependable Performance, OE Replacement, RN12YC

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$4.49
Dependable performance. This Champion® spark plug features a copper core electrode that provides increased conductivity and heat control for good overall wear.

Product Features:
  • Copper Plus – Dependable Performance and Durability
  • Copper core center electrode allows for accurate control of heat range for longer life
  • Superior corrosion resistance
  • Built to ISO and SAE standards for proven performance
  • Built to ISO and SAE standards for proven performance
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Delphi – Ignition Coil (Part No.GN10571)

Ignition Coil

from

$70.99
Delphi OE technology ignition products are validated to match the vehicles system; OE quality replacement parts for the right fit , form and function; Delphi coils provide OE performance, durability and electromagnetic capacity level requirements.

Product Features:
  • Delphi coils provide OE performance, durability and electromagnetic capacity level requirements
  • Delphi ignition coils are designed to operate as part of an integral engine management system to insert power into spark plugs and ensure fast starts; consistent engine performance and optimized fuel efficiency
  • Delphi uses winding process techniques to control the length of wire between adjacent windings; that’s important since more length means greater voltage differences and can create more pressure that could break down the insulation and wire coating
  • We back our ignition coil design with proven materials, such as high quality wires and wire coating that resists the cracks, pin holes and imperfections that most often lead to failure issues
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Carquest Premium – Ignition Coil: Meets or Exceeds Original Equipment Specifications, 1 Piece (Part No.EBC1006)

Ignition Coil: Meets or Exceeds Original Equipment Specifications, 1 Piece

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$44.99
Carquest Premium ignition coils meet or exceed original equipment (OE) specifications and are developed by top OE/OES manufacturers to ensure superior performance. All of our Carquest Premium ignition coils are developed by IATF 16949 certified manufacturers for consistent durability and long-lasting performance. These ignition coils use high-quality components and will utilize optimized designs on applications where the OE ignition coil had frequent failures. We require stringent testing standards to ensure proper fit and performance for each application and stand behind our Carquest Premium ignition coils with an industry-leading warranty. Carquest Premium ignition coils 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:
  • Computer-Aided Design (CAD), laser scanning and 3D printing – utilizing Fused Deposition Modeling (FDM) and Stereolithography (SLA) – in the part design process ensures speed-to-market and a precise fit guaranteed.
  • 100% pure copper precision-wound windings increase coil life and ensure reliability and maximum coil output when needed.
  • Highly conductive aluminum alloy secondary terminal guarantees secondary coil terminals will not oxidize (rust), will provide excellent conductivity, extended coil life and will not cause excessive stress on the primary control circuit.
  • 100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
  • 100% end-of-line tested to ensure confidence and product reliability, every time.
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NGK – Ignition Coil: Meets or Exceeds Original Equipment Specifications, 1 Piece (Part No.48705)

Ignition Coil: Meets or Exceeds Original Equipment Specifications, 1 Piece

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$58.99
NGK ignition coils are manufactured to meet or exceed OE standards for the highest durability and operational performance, so they can be installed with confidence. NGK and their family of automotive products have over 80 year’s experience and are driven by extreme dedication to innovation, performance and quality. Developed and rigorously tested in our ISO 17025 accredited test lab under the most extreme conditions, NGK’s coil designs will outperform all others – far beyond operational environments a vehicle would actually experience

Product Features:
  • OE QUALITY: Vacuum-sealed premium epoxy resin and thermoplastic coil housings provide superior dielectric strength, voltage insulation and durability
  • OPTIMAL PERFORMANCE: Precision coil windings and laminations maximize outputs, custom NGK ASIC chipset optimizes efficiency, prevents component damage
  • EASE OF INSTALLATION: NGK Ignition Coils include ignition control module, premium high temperature coil boot, and jumper harnesses where required
  • THE NGK DIFFERENCE: Featuring superior materials and design enhancements.
  • EXTENSIVE TESTING: NGK ignition coils must pass extreme testing during manufacturing to ensure the highest quality and durability standards are met
  • PRODUCT ENGINEERING: Advanced flow and stress modeling systems preemptively identify and avoid common failure points found in OE and competitor coils
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DENSO – Direct Ignition Coil (Part No.673-9330)

Direct Ignition Coil

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$34.99
As the innovator and leader in stick coil technology DENSO has conducted superior testing and inspection processes to insure the highest quality ignition coil. Don’t be fooled by imitations – look for the DENSO name to be sure you’re getting the best.
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VDO – Knock Sensor (Part No.F6020304273VDO)

Knock Sensor

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$149.93
The VDO OE quality knock sensor is engineered to the exact specifications of the vehicle manufacturer to ensure the replacement sensor is the same in quality and function as the part installed as first equipment.

Product Features:
  • OEM quality direct fit application
  • Ground-isolated design with two-wire shielded harness helps protect the sensor signal from electro-magnetic interference (EMI)
  • Mounting hole is the same size as OE
  • Maintains OE specifications for frequency response
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Carquest Premium – Knock Sensor (Part No.SBC3898)

Knock Sensor

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$212.99
Carquest Knock Sensors respond to a wide range of engine knock frequencies providing accurate engine condition to the ECM for optimal ignition timing. Highest quality piezoceramic element manufactured to tight tolerances for increased durability. All MotoRad Knock Sensors are designed to meet or exceed OEM specifications at our ISO TS16949 manufacturing facilities.

Product Features:
  • Precision piezoceramic element ensures accurate response to a wide range of engine vibrations
  • Manufactured using the highest quality OEM materials to ensure optimal performance and rugged durability
  • Designed to meet or exceed all OEM specifications in fit, form & function
  • Extensive product testing includes salt spray, high/low temperature impact, thermal cycling, vibration, drop among other tests, to ensure all sensors meet or exceed OEM specifications.
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Carquest Premium – Knock Sensor (Part No.SBC4019)

Knock Sensor

from

$64.99
Carquest Knock Sensors respond to a wide range of engine knock frequencies providing accurate engine condition to the ECM for optimal ignition timing. Highest quality piezoceramic element manufactured to tight tolerances for increased durability. All MotoRad Knock Sensors are designed to meet or exceed OEM specifications at our ISO TS16949 manufacturing facilities.

Product Features:
  • Precision piezoceramic element ensures accurate response to a wide range of engine vibrations
  • Manufactured using the highest quality OEM materials to ensure optimal performance and rugged durability
  • Designed to meet or exceed all OEM specifications in fit, form & function
  • Extensive product testing includes salt spray, high/low temperature impact, thermal cycling, vibration, drop among other tests, to ensure all sensors meet or exceed OEM specifications.
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Carquest Premium – Knock Sensor (Part No.SBC3953)

Knock Sensor

from

$149.99
Carquest Knock Sensors respond to a wide range of engine knock frequencies providing accurate engine condition to the ECM for optimal ignition timing. Highest quality piezoceramic element manufactured to tight tolerances for increased durability. All MotoRad Knock Sensors are designed to meet or exceed OEM specifications at our ISO TS16949 manufacturing facilities.

Product Features:
  • Precision piezoceramic element ensures accurate response to a wide range of engine vibrations
  • Manufactured using the highest quality OEM materials to ensure optimal performance and rugged durability
  • Designed to meet or exceed all OEM specifications in fit, form & function
  • Extensive product testing includes salt spray, high/low temperature impact, thermal cycling, vibration, drop among other tests, to ensure all sensors meet or exceed OEM specifications.
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Encore Automotive – Genuine OE Ignition Knock (Detonation) Sensor (Part No.SKS-G30002)

Genuine OE Ignition Knock (Detonation) Sensor

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$153.99
Encore Automotive Genuine OE knock sensor detects excessive/unusual pulses caused by the engine ignition and makes proper adjustments to reduce the risk of damaging pistons. Encore Automotive is dedicated to bringing the latest original equipment technologies to the Aftermarket to provide the highest overall value.

Product Features:
  • Genuine OE Part
  • Highly accurate engine vibration detection
  • Excellent material quality
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Dorman – Help – Spark Plug Non-Foulers – 14mm Gasket Seat Long Reach (Part No.42004)

Spark Plug Non-Foulers - 14mm Gasket Seat Long Reach

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$9.99
This spark plug non fouler is designed for easy installation on specified vehicles to protect spark plugs from fouling and damage. It is engineered for durability and reliable performance.

Product Features:
  • Direct replacement – this spark plug non fouler is designed for easy installation to protect spark plugs from fouling and damage on specified vehicles
  • Ideal solution – this non-fouler preserves spark plug life and is a reliable replacement for an original non-fouler that has failed due to corrosion
  • Durable construction – made from quality components to ensure reliable performance and a 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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1991 BMW 525i Ignition and Tune-Up Products

You count on your 1991 BMW 525i to run right. That means taking care of it with regular maintenance, necessary repairs, and the right parts. Advance Auto Parts can help with all of that thanks to our extensive inventory of trusted Ignition and Tune-Up Products. With 32 Ignition and Tune-Up Products ranging in price from $3.49 to $226.99, you’re sure to find everything you need for your 1991 BMW 525i.

Brands matter. If you want to shop a specific Ignition and Tune-Up Products brand, we stock 12 different brands like Autolite, NGK, and DENSO. 1991 BMW 525i Ignition and Tune-Up Products start as low as $3.49!

One of the best ways to find top quality OEM or aftermarket Ignition and Tune-Up Products is by asking professionals. Short of that, you can shop with confidence thanks to our 1,251 extensive product reviews on 1991 BMW 525i Ignition and Tune-Up Products. Some of the top-rated Ignition and Tune-Up Products products we carry are DiamondFIRE Automotive Spark Plug: More Power, Saves Gas with 4.1 stars and Platinum TT Spark Plug with Twin-Tip Design for Enhanced Ignition with 4.6 stars.

Did we mention you can order your Ignition and Tune-Up Products from our online catalog and have them shipped right to your garage? Or, if you feel like seeing the parts first-hand, search for your nearest Advance Auto Parts location above and pick up in-store when you’re ready. Browse our full Ignition and Tune-Up Products inventory for your 1991 BMW 525i below to get started!

Top-Rated Ignition and Tune-Up Products Brands For Your 1991 BMW 525i

Trusted Ignition and Tune-Up Products OEM and aftermarket product brands are what Advance Auto Parts specializes in. The brands we work with are sure to keep that 1991 BMW 525i running right for years to come. In our inventory you’ll find brands like Autolite, NGK, DENSO, and even more.

Popular Champion Ignition and Tune-Up Products

You’ll find popular Champion brand products across Spark Plugs. All are waiting to get your 1991 BMW 525i back on the road. Some of the top-rated Champion products in these categories are:

Top-Rated Autolite Iridium Ignition and Tune-Up Products


If Autolite Iridium are what you’re looking for, our inventory holds plenty. We stock Autolite Iridium brand Ignition and Tune-Up Products for your 1991 BMW 525i, and some of our most reviewed Autolite Iridium parts include:

FAQs for 1991 BMW 525i Ignition and Tune-Up Products

What are the most purchased Ignition and Tune-Up Products for the 1991 BMW 525i?

Out of 32 Ignition and Tune-Up Products for the 1991 BMW 525i, the most popular in our inventory are:

What are the top-rated 1991 BMW 525i Ignition and Tune-Up Products?

Top-rated Ignition and Tune-Up Products for your 1991 BMW 525i based on customer reviews/ratings are:
DiamondFIRE Automotive Spark Plug: More Power, Saves Gas
from $6.99
(184)
DiamondFIRE Automotive Spark Plug: More Power, Saves Gas
“Great product”
Platinum TT Spark Plug with Twin-Tip Design for Enhanced Ignition
from $3.99
(105)
Platinum TT Spark Plug with Twin-Tip Design for Enhanced Ignition
“Very nice quality. Installed like factory. Ran great.”
Iridium IX Spark Plug: Single Iridium Fine Wire, BKR6EIX
from $11.99
(94)
Iridium IX Spark Plug: Single Iridium Fine Wire, BKR6EIX
“gas milage whet up”