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BMW E46 Engine Emission Parts

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Front Manifold Oxygen Sensor - Front Position/Pre-Cat

ES#3031886 - 11781743994 - Front Manifold Oxygen Sensor - Front Position/Pre-Cat - Located in the front position of the exhaust manifold for cylinders 1-3 on the S54 engine - Bosch - BMW

Located in the front position of the exhaust manifold for cylinders 1-3 on the S54 engine affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes! 2X Entries For Our 25th Anniversary Sweepstakes! 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
3031886
Mfg#:
11781743994
In Stock
$199.99

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

$138.35 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Secondary Air Pump

ES#2574864 - 11727571589 - Secondary Air Pump - Common source of emissons related issues - Pierburg - BMW
ECS Tuning recommends this product.

Common source of emissons related issues affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with production date from 03/2003

Brand:
Pierburg - Corporate Logo
ES#:
2574864
Mfg#:
11727571589
In Stock
$393.85

This product was last offered at the strikethrough price on
03-21-2026

$358.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Fuel Tank Breather Valve

ES#35479 - 13901433603 - Fuel Tank Breather Valve - Valve between charcoal canister and throttle body - Genuine BMW - BMW

Valve between charcoal canister and throttle body affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
35479
Mfg#:
13901433603
Ships in 1-2 days
$120.89

This product was last offered at the strikethrough price on
01-07-2026

$120.88 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Billet Fuel Cap

ES#4643099 - MMR03-1501 - Billet Fuel Cap - Upgraded fuel cap that adds the MMX style - MMX Performance - BMW MINI

Upgraded fuel cap that adds the MMX style affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with production date from 08/1999

Brand:
MMX Performance - Corporate Logo
ES#:
4643099
Mfg#:
MMR03-1501
Back Ordered
$136.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Crankcase Pressure Regulator Valve

ES#25703 - 11617501566 - Crankcase Pressure Regulator Valve - Commonly referred to as the "oil separator" or PCV - Genuine BMW - BMW

Commonly referred to as the "oil separator" or PCV affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
25703
Mfg#:
11617501566
Ships in 1-2 days
9% off MSRP

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

$102.99

This product was last offered at the strikethrough price on
02-18-2026

$93.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor - Rear Manifold

ES#261735 - 11787514927 - Oxygen Sensor - Rear Manifold - Located in the rear position of the exhaust manifold - Bosch - BMW

Located in the rear position of the exhaust manifold affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes! 2X Entries For Our 25th Anniversary Sweepstakes! 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
For vehicles with production date from 03/2003

Brand:
Bosch - Corporate Logo
ES#:
261735
Mfg#:
11787514927
In Stock at Vendor
$139.73 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Turner S54 Baffled Oil Catch Can System

ES#3458274 - 015515TMS01-01KT - Turner S54 Baffled Oil Catch Can System - A 4 chamber, baffled oil catch can with valved drain system - complete with an application-specific mounting hardware and silicone hoses - Turner Motorsport - BMW

A 4 chamber, baffled oil catch can with valved drain system - complete with an application-specific mounting hardware and silicone hoses affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Turner Motorsport - Corporate Logo
ES#:
3458274
Mfg#:
015515TMS01-01KT
Ships on Jul 1, 2026
Auto Notify
ON SALE! SAVE 27%
$516.02

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

$375.79 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Air Pump Control Valve (EGR)

ES#26817 - 11727553063 - Air Pump Control Valve (EGR) - Attached to the secondary air pump - Genuine BMW - BMW

Attached to the secondary air pump affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
26817
Mfg#:
11727553063
In Stock
4% off MSRP

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

$194.99

This product was last offered at the strikethrough price on
06-03-2026

$186.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Vacuum Control Valve

ES#254257 - 11747810831 - Vacuum Control Valve - Used in emissions and noise reduction systems - Genuine BMW - BMW MINI

Used in emissions and noise reduction systems affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
254257
Mfg#:
11747810831
Ships in 5 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.

$61.00

This product was last offered at the strikethrough price on
06-03-2026

$54.64 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

PCV Breather Hose Replacement Kit

ES#4783146 - 11617501566KT - PCV Breather Hose Replacement Kit - Replace Your Broken or Damaged PCV Hoses in This All-Inclusive Kit! - Hamburg Tech - BMW

Replace Your Broken or Damaged PCV Hoses in This All-Inclusive Kit! 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#:
4783146
Mfg#:
11617501566KT
In Stock
$93.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

S54 CSL Silicone Crankcase Vent Hose

ES#4620697 - 018562LA02 - S54 CSL Silicone Crankcase Vent Hose - Attaches between the oil separator and the CSL air box. - Turner Motorsport - BMW

Attaches between the oil separator and the CSL air box. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Turner Motorsport - Corporate Logo
ES#:
4620697
Mfg#:
018562LA02
In Stock
ON SALE! SAVE 32%
$91.99

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

$62.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Carbon Competition Fuel Cap Cover

ES#4904975 - BM-0006-BCG - Carbon Competition Fuel Cap Cover - Elevate the aesthetics of your BMW and leave no stone unturned; take your BMW to the next level with the AutoTecknic dry carbon fiber fuel cap cover. - AUTOTECKNIC - BMW MINI

Elevate the aesthetics of your BMW and leave no stone unturned; take your BMW to the next level with the AutoTecknic dry carbon fiber fuel cap cover. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
AUTOTECKNIC - Corporate Logo
ES#:
4904975
Mfg#:
BM-0006-BCG
In Stock
$65.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Two Port Universal Catch Can - Black

ES#4338487 - MMBCC-CBTWO - Two Port Universal Catch Can - Black - Mishimoto Compact Baffled Oil Catch Can - Mishimoto - BMW

Mishimoto Compact Baffled Oil Catch Can affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Mishimoto - Corporate Logo
ES#:
4338487
Mfg#:
MMBCC-CBTWO
In Stock
$160.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Secondary Air Pump Kit - Level 2

ES#2622506 - 11727571589KT - Secondary Air Pump Kit - Level 2 - This comprehensive air pump kit includes all lines, valves, pump, and hardware. - Genuine BMW - BMW

This comprehensive air pump kit includes all lines, valves, pump, and hardware. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with production date from 03/2003

Brand:
Genuine BMW - Corporate Logo
ES#:
2622506
Mfg#:
11727571589KT
Ships in 5 Business Days
$1286.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Front Manifold Oxygen Sensor - Rear Position/Post-Cat

ES#11025 - 15138 - Front Manifold Oxygen Sensor - Rear Position/Post-Cat - Also BMW # 11781406621. Located in the rear position of the exhaust manifold for cylinders 1-3 on the S54 engine - Bosch - BMW

Also BMW # 11781406621. Located in the rear position of the exhaust manifold for cylinders 1-3 on the S54 engine affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes! 2X Entries For Our 25th Anniversary Sweepstakes! 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
11025
Mfg#:
15138
In Stock
Limited Qty Sale
$145.27

This product was last offered at the strikethrough price on
05-21-2026

$130.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Gas Cap

ES#5340306 - 16117222391 - Gas Cap - Complete with sealing gasket and tether. - Hamburg Tech - BMW MINI

Complete with sealing gasket and tether. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Hamburg Tech - Corporate Logo
ES#:
5340306
Mfg#:
16117222391
In Stock
$24.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Emission Parts

Repairing failed emission components doesn't just turn off the check engine light so you can pass your local emissions test, it also improves performance and fuel economy. ECS stocks all common emission controls, from oxygen sensors to PCV valves.

Let us help you find the parts that fit your BMW

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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