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BMW E46 323i M52 2.5L

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BMW E46 323i M52 2.5L Engine Parts & Accessories

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Return Pipe

ES#25712 - 11617504536 - Return Pipe - Runs from the intake manifold back to connecting hose - Genuine BMW - BMW

Runs from the intake manifold back to connecting hose affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with production date from 01/2000

Brand:
Genuine BMW - Corporate Logo
ES#:
25712
Mfg#:
11617504536
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.

$43.99

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

$42.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Knock Sensor

ES#34436 - 13627568422 - Knock Sensor - Detects engine ping and changes timing accordingly - Genuine BMW - BMW

Detects engine ping and changes timing accordingly affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
34436
Mfg#:
13627568422
Ships in 6 Business Days
10% off MSRP

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

$173.99

This product was last offered at the strikethrough price on
06-12-2026

$156.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Remanufactured Starter

ES#2724206 - 12411740379ktbKT - Remanufactured Starter - Remanufactured unit, $52 refundable core charge included in price. - Bosch - BMW

Remanufactured unit, $52 refundable core charge included in price. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat! Does not have threaded mounting holes.

Brand:
Bosch - Corporate Logo
ES#:
2724206
Mfg#:
12411740379KTBKT
In Stock
$234.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Secondary Air Pump Kit - Level 1

ES#2622539 - 11727553056KT3 - Secondary Air Pump Kit - Level 1 - This essential kit includes the secondary air pump, control valve, hoses and hardware to mount pump and valve. - Assembled By ECS - BMW

This essential kit includes the secondary air pump, control valve, hoses and hardware to mount pump and valve. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
For vehicles with production date up to 03/2003

Brand:
Assembled By ECS - Corporate Logo
ES#:
2622539
Mfg#:
11727553056KT3
Ships in 3 Business Days
$473.99

This product was last offered at the strikethrough price on
06-05-2026

$464.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Supertech Performance Intake Valve - Priced Each

ES#3024819 - BMIVN-1030 - Supertech Performance Intake Valve - Priced Each - One of the best valves for high performance applications! - Supertech - BMW

One of the best valves for high performance applications! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Supertech - Corporate Logo
ES#:
3024819
Mfg#:
BMIVN-1030
Ships in 8 Business Days
$32.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Crankshaft Seal

ES#4070567 - 11141706785 - Rear Crankshaft Seal - Replace when doing a clutch job. - Corteco - BMW

Replace when doing a clutch job. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Corteco - Corporate Logo
ES#:
4070567
Mfg#:
11141706785
In Stock
$42.99

This product was last offered at the strikethrough price on
06-08-2026

$19.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

E46 Z4 Radiator - Automatic

ES#38236 - 17119071519 - E46 Z4 Radiator - Automatic - Genuine replacement radiator - Genuine BMW - BMW

Genuine replacement radiator affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with automatic transmission only

Brand:
Genuine BMW - Corporate Logo
ES#:
38236
Mfg#:
17119071519
Ships in 3 Business Days
6% off MSRP

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

$487.99

This product was last offered at the strikethrough price on
06-12-2026

$456.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Radiator

ES#38235 - 17119071518 - Radiator - Genuine replacement radiator. - Genuine BMW - BMW

Genuine replacement radiator. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with manual transmission only and with production date from 10/1998

Brand:
Genuine BMW - Corporate Logo
ES#:
38235
Mfg#:
17119071518
Ships in 3 Business Days
6% off MSRP

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

$487.99

This product was last offered at the strikethrough price on
06-12-2026

$456.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Camshaft Position Sensor

ES#4316514 - 12147518628 - Camshaft Position Sensor - Exhaust side, includes a new o-ring seal - Bremmen Parts - BMW

Exhaust side, includes a new o-ring seal affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4316514
Mfg#:
12147518628
Ships in 6 Business Days
ON SALE! SAVE 16%
$31.99

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

$26.87 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Secondary Air Pump Vacuum Line

ES#26851 - 11727574490 - Secondary Air Pump Vacuum Line - Replacement line - Genuine BMW - BMW

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

Brand:
Genuine BMW - Corporate Logo
ES#:
26851
Mfg#:
11727574490
In Stock
3% off MSRP

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

$58.99

This product was last offered at the strikethrough price on
06-12-2026

$56.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

O-Ring for Camshaft Position Sensor (17 X 3 mm)

ES#2828422 - 12141748398 - O-Ring for Camshaft Position Sensor (17 X 3 mm) - Always replace the o-ring when replacing sensor - URO - BMW

Always replace the o-ring when replacing sensor 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#:
2828422
Mfg#:
12141748398
In Stock
$1.39 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Heater Return Hose

ES#2879541 - 11531433059 - Heater Return Hose - Metal pipe used to connect many heater hoses - Vaico - BMW

Metal pipe used to connect many heater hoses affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
2879541
Mfg#:
11531433059
In Stock at Vendor
$231.99

This product was last offered at the strikethrough price on
05-07-2026

$224.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Crankshaft Position Sensor

ES#2813630 - 12141709616 - Crankshaft Position Sensor - Does not include O-ring - Hamburg Tech - BMW

Does not include O-ring affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2813630
Mfg#:
12141709616
In Stock
$49.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Camshaft Position Sensor

ES#4316483 - 12147539165 - Camshaft Position Sensor - Located on the intake side of the engine - Bavarian Autosport - BMW

Located on the intake side of the engine affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bavarian Autosport - Corporate Logo
ES#:
4316483
Mfg#:
12147539165
Ships on Sep 17, 2026
Auto Notify
ON SALE! SAVE 20%
$27.99

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

$22.39 USD
Free Shipping
on orders $49 and up

Cylinder Head Gasket

ES#18441 - 11127501304 - Cylinder Head Gasket - Just the head gasket - Genuine BMW - BMW

Just the head gasket affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
18441
Mfg#:
11127501304
Ships in 3 Business Days
5% off MSRP

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

$234.99

This product was last offered at the strikethrough price on
06-12-2026

$222.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Ignition Coil - Priced Each

ES#2534506 - 12137599219 - Ignition Coil - Priced Each - Comes with plug connector - URO - BMW

Comes with plug connector 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#:
2534506
Mfg#:
12137599219
Ships in 1 Business Day
$36.99 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.

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