Shop Our Clearance Sale - Up To 80% Off FREE SHIPPING on Orders $49+ *exclusions apply
affirm financing terms & conditions

Menu

Call Us330-331-2003 ChatLive Chat Text Us!
0 Shopping Cart
Your Vehicle Clear

BMW E34 525i M20 2.5L

    • Audi
    • BMW
    • Mercedes Benz
    • MINI
    • Porsche
    • Volkswagen

Saved Vehicles

My Vehicles
You currently have no stored vehicles.

Recent Vehicles

Recent Vehicles Manage Vehicles

You currently have no recent vehicles.

We'll automatically keep fully selected vehicles here for your convenience.

Call Us330-331-2003 ChatLive Chat Text Us!
Track My Order View Order History Submit a Return Contact Us Wholesale Information Lifetime Replacement Returns and Warranty Information
0
Call Us330-331-2003 ChatLive Chat Text Us!
Track My Order View Order History Submit a Return Contact Us Wholesale Information Lifetime Replacement Returns and Warranty Information
Cancel
0
Sales & Specials
Enter Your Vehicle
affirm financing terms & conditions
garage-red
Your Vehicle BMW E34 525i M20 2.5L
Your Vehicle BMW E34 525i M20 2.5L
Change Clear

BMW E34 525i M20 2.5L Engine Parts & Accessories

Sort By
Filter By
Return to Top

Crankshaft Position Sensor

ES#4871938 - 12141720856 - Crankshaft Position Sensor - Bremmen Parts - BMW

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4871938
Mfg#:
12141720856
In Stock
ON SALE! SAVE 20%
$42.99

This product was last offered at the strikethrough price on
05-02-2026

$34.26 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Belt Tension Adjuster Bar

ES#29462 - 12311719992 - Belt Tension Adjuster Bar - Genuine BMW - BMW

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
29462
Mfg#:
12311719992
In Stock
$48.78 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Fuel Tank Breather Valve

ES#35528 - 13901726705 - Fuel Tank Breather Valve - Connects fuel tank breather to throttle body - Genuine BMW - BMW

Connects fuel tank breather to throttle body affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
35528
Mfg#:
13901726705
In Stock
2% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$103.99

This product was last offered at the strikethrough price on
07-08-2026

$101.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#3023872 - 17111742231 - Expansion Tank Cap - Replace when performing cooling service. - Mahle-Behr - BMW

Replace when performing cooling service. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Mahle-Behr - Corporate Logo
ES#:
3023872
Mfg#:
17111742231
In Stock
$19.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Spark Plug - NGK ZGR5A (5077)

ES#4715932 - 12129061869 - Spark Plug - NGK ZGR5A (5077) - NGK - BMW

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
NGK - Corporate Logo
ES#:
4715932
Mfg#:
12129061869
Ships in 1 Business Day
$6.99

This product was last offered at the strikethrough price on
07-06-2026

$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Alternator Tensioner Nut

ES#29781 - 12317677914 - Alternator Tensioner Nut - Gear used against a bracket to tighten belt - Genuine BMW - BMW

Gear used against a bracket to tighten belt affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
29781
Mfg#:
12317677914
In Stock
$15.23 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cylinder Head - Bare

ES#2918684 - 11121707032 - Cylinder Head - Bare - Bare head, guides and seats only - AMC - BMW

Bare head, guides and seats only affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
AMC - Corporate Logo
ES#:
2918684
Mfg#:
11121707032
Ships on Jul 31, 2026
$999.00 USD

Ignition Rotor

ES#2652134 - 12111715906 - Ignition Rotor - Cure your misfire problems - Genuine BMW - BMW

Cure your misfire problems affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
2652134
Mfg#:
12111715906
In Stock
2% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$55.99

This product was last offered at the strikethrough price on
04-06-2026

$54.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Liqui Moly MolyGen Oil Change Kit / Inspection I

ES#3470583 - M20IN1mgKT - Liqui Moly MolyGen Oil Change Kit / Inspection I - Includes five quarts of Liqui Moly MolyGen 5w-40 semi-synthetic engine oil, Mann oil filter and new drain plug - Assembled By ECS - BMW

Includes five quarts of Liqui Moly MolyGen 5w-40 semi-synthetic engine oil, Mann oil filter and new drain plug affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Next generation synthetic oil with up to 15% lower coefficient of friction. Glows green under UV light fo

Brand:
Assembled By ECS - Corporate Logo
ES#:
3470583
Mfg#:
M20IN1MGKT
In Stock
ON SALE! SAVE 22%
$90.99

This product was last offered at the strikethrough price on
05-15-2026

$70.67 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Timing Belt

ES#260739 - 11311469240 - Timing Belt - Needs to be replaced every 50k miles - Continental - BMW

Needs to be replaced every 50k miles affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Continental - Corporate Logo
ES#:
260739
Mfg#:
11311469240
In Stock
$30.26

This product was last offered at the strikethrough price on
05-25-2026

$22.44 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Ignition Distributor Cap

ES#4818095 - 12111725070 - Ignition Distributor Cap - Keep your BMW running smooth - Bremmen Parts - BMW

Keep your BMW running smooth affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818095
Mfg#:
12111725070
Ships on Sep 23, 2026
Auto Notify
ON SALE! SAVE 20%
$81.99

This product was last offered at the strikethrough price on
05-02-2026

$65.27 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Fan Switch

ES#2534474 - 61311378073 - Radiator Fan Switch - Measures radiator air temperature enabling the fan to turn off or on - URO - BMW

Measures radiator air temperature enabling the fan to turn off or on affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2534474
Mfg#:
61311378073
In Stock
$26.44 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 80C

ES#2712776 - 11531713040 - Thermostat - 80C - Includes sealing o-ring - Vemo - BMW
ECS Tuning recommends this product.

Includes sealing o-ring affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Vemo - Corporate Logo
ES#:
2712776
Mfg#:
11531713040
In Stock
$21.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Starter

ES#3104724 - 12412289185 - Starter - Includes refundable $100.00 core charge. - Genuine BMW - BMW

Includes refundable $100.00 core charge. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
3104724
Mfg#:
12412289185
Ships in 7 Business Days
$961.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Schrick performance Valve Spring Set

ES#3025537 - 005602022-062 - Schrick performance Valve Spring Set - Tougher valve spring to support higher lift - Schrick - BMW

Tougher valve spring to support higher lift affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Schrick - Corporate Logo
ES#:
3025537
Mfg#:
005602022-062
Ships on Oct 26, 2026
$917.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Turner Motorsport Aluminum Solid Transmission Mounts

ES#3438526 - 017730TMS03 - Turner Motorsport Aluminum Solid Transmission Mounts - Designed for track use to eliminate deflection and drive line slop - Turner Motorsport - BMW

Designed for track use to eliminate deflection and drive line slop affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Turner Motorsport - Corporate Logo
ES#:
3438526
Mfg#:
017730TMS03
In Stock
ON SALE! SAVE 27%
$113.99

This product was last offered at the strikethrough price on
05-02-2026

$82.77 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Parts & Accessories

Whether you're maintaining or repairing your stock engine or looking for added horsepower, we have one of the most comprehensive inventories of engine parts and accessories for German cars. From hard engine parts like connecting rods, pistons, cylinder heads, short blocks, and engine timing parts to performance engine software upgrades; we have you covered.

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

Terms of Use Privacy Policy ECS Tuning is part of Enthusiast Auto Holdings