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 E46 323i M52 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 E46 323i M52 2.5L
Your Vehicle BMW E46 323i M52 2.5L
Change Clear

BMW E46 323i M52 2.5L Engine Parts & Accessories

Sort By
Filter By
Return to Top

ECS Cooling System Refresh Kit - Level 3

ES#2497298 - 17119071518KT - ECS Cooling System Refresh Kit - Level 3 - The ultimate kit to cover all the necessary components - featuring OEM contents - Genuine BMW - BMW

The <font color='red'> ultimate</font> kit to cover all the necessary components - featuring OEM contents affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with manual transmission only and production date from 10/1998

Brand:
Genuine BMW - Corporate Logo
ES#:
2497298
Mfg#:
17119071518KT
Ships in 1-2 days
$2306.99 USD
This product is lifetime replacement eligible Partial Replacement

Oxygen Sensor - Priced Each

ES#4870454 - 11781742050 - Oxygen Sensor - Priced Each - 2 required in each application - URO - BMW

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

Brand:
URO - Corporate Logo
ES#:
4870454
Mfg#:
11781742050
In Stock
$49.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

WPC-Treated Race Series Main Bearing Set - M20/M50/M52/M54/S54

ES#4845662 - M5X-WPC-MB - WPC-Treated Race Series Main Bearing Set - M20/M50/M52/M54/S54 - The strongest and smoothest bearings for your BMW, featuring heavy-duty ACL "Duraglide" bearing shells treated by WPC for reduced friction and enhanced durability. - Turner Motorsport - BMW

The strongest and smoothest bearings for your BMW, featuring heavy-duty ACL "Duraglide" bearing shells treated by WPC for reduced friction and enhanced durability. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Turner Motorsport - Corporate Logo
ES#:
4845662
Mfg#:
M5X-WPC-MB
In Stock
ON SALE! SAVE 10%
$509.99

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

$458.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Athena Cut Ring Head Gasket - 84.5mm (84mm Bore)

ES#4758998 - ATH-HG-CR-M50-84 - Athena Cut Ring Head Gasket - 84.5mm (84mm Bore) - Upgrade From The OE MLS Gasket to The Best Performance Head Gasket on the Market! - 5150 Autosport - BMW

Upgrade From The OE MLS Gasket to The Best Performance Head Gasket on the Market! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
5150 Autosport - Corporate Logo
ES#:
4758998
Mfg#:
ATH-HG-CR-M50-84
In Stock
$324.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Pressure Switch - M12x1.5

ES#2683652 - 12618611273 - Oil Pressure Switch - M12x1.5 - Leaking or malfunctioning oil pressure switches can be disastrous - Genuine BMW - BMW

Leaking or malfunctioning oil pressure switches can be disastrous affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
2683652
Mfg#:
12618611273
In Stock
17% off MSRP

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

$34.59

This product was last offered at the strikethrough price on
06-11-2026

$28.79 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Mechanical A/C Belt Tensioner Assembly

ES#4759474 - 11281433571 - Mechanical A/C Belt Tensioner Assembly - Complete tensioner assembly with roller - Bremmen Parts - BMW

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

Brand:
Bremmen Parts - Corporate Logo
ES#:
4759474
Mfg#:
11281433571
In Stock
ON SALE! SAVE 21%
$59.99

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

$47.32 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Cooling System Refresh Kit - Level 2

ES#2063862 - ECSE461711-5 - ECS Cooling System Refresh Kit - Level 2 - A more advanced kit that includes belt service components and a ECS aluminum pulley - featuring aftermarket contents - Assembled By ECS - BMW

A more advanced kit that includes belt service components and a ECS aluminum pulley - featuring aftermarket contents affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
2063862
Mfg#:
ECSE461711-5
Ships on Jun 29, 2026
Auto Notify
ON SALE!
$474.99

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

$453.07 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Oil Level Sensor O-Ring

ES#3478331 - 12611744292 - Oil Level Sensor O-Ring - Used to seal sensor to the oil pan - Elring - BMW

Used to seal sensor to the oil pan affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Elring - Corporate Logo
ES#:
3478331
Mfg#:
12611744292
Ships in 1 Business Day
$11.71

This product was last offered at the strikethrough price on
06-11-2026

$5.23 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

6mm Single Groove Valve Keeper - Priced Each

ES#2598482 - KPR-6S-7 - 6mm Single Groove Valve Keeper - Priced Each - Two required per valve, necessary for use with certain supertech valves - Supertech - BMW

Two required per valve, necessary for use with certain supertech valves affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Supertech - Corporate Logo
ES#:
2598482
Mfg#:
KPR-6S-7
In Stock
$5.99

This product was last offered at the strikethrough price on
03-04-2026

$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Connecting Rod Bolt

ES#2641302 - 11241739729 - Connecting Rod Bolt - The stretch bolt design means these need replaced once removed - Genuine BMW - BMW

The stretch bolt design means these need replaced once removed affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
2641302
Mfg#:
11241739729
In Stock
$7.98 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Line Fitting Adapter

ES#2817090 - MM0CF-BMW - Oil Line Fitting Adapter - Allows you to use larger after market oil coolers that utilize AN fittings - Mishimoto - BMW

Allows you to use larger after market oil coolers that utilize AN fittings affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Mishimoto - Corporate Logo
ES#:
2817090
Mfg#:
MM0CF-BMW
In Stock
$88.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cometic "MLS" Multi Layer Steel Head Gasket - .070 Inch

ES#3177687 - C4328-070 - Cometic "MLS" Multi Layer Steel Head Gasket - .070 Inch - Improve your head gasket strength and reliability for performance NA and forced induction applications! - Cometic - BMW

Improve your head gasket strength and reliability for performance NA and forced induction applications! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Cometic - Corporate Logo
ES#:
3177687
Mfg#:
C4328-070
Ships in 1-2 days
$245.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Hose - Lower

ES#4304690 - 11531436408 - Radiator Hose - Lower - A common source of cooling system failure - Bremmen Parts - BMW
ECS Tuning recommends this product.

A common source of cooling system failure affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4304690
Mfg#:
11531436408
In Stock
ON SALE! SAVE 16%
$36.99

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

$31.20 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Upper Timing Chain Tensioner

ES#4039816 - 11311738700 - Upper Timing Chain Tensioner - Guide used to tension the timing chain - Bavarian Autosport - BMW

Guide used to tension the timing chain affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bavarian Autosport - Corporate Logo
ES#:
4039816
Mfg#:
11311738700
In Stock
ON SALE! SAVE 20%
$49.99

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

$39.99 USD
Free Shipping
on orders $49 and up

E46 Methanol Injection System

ES#3438868 - 14-003 - E46 Methanol Injection System - Reduce heat soak - Active Autowerke - BMW

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

Brand:
Active Autowerke - Corporate Logo
ES#:
3438868
Mfg#:
14-003
Ships in 3 Business Days
$2137.00 USD
Free Shipping

Transmission Mount - Priced Each

ES#41849 - 22322282340 - Transmission Mount - Priced Each - Secure the rear of the transmission to the crossmember - Genuine BMW - BMW

Secure the rear of the transmission to the crossmember affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
41849
Mfg#:
22322282340
Ships in 1-2 days
8% off MSRP

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

$92.25

This product was last offered at the strikethrough price on
06-11-2026

$84.87 USD
Free Shipping
on orders $49 and up
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