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BMW M3 Exhaust Emission Parts

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7/8"(22mm) Flexible Oxygen Sensor Wrench

ES#240942 - FO-78 - 7/8"(22mm) Flexible Oxygen Sensor Wrench - The proper tool to remove difficult-to-reach oxygen sensors - Schwaben - Audi BMW Volkswagen Mercedes Benz MINI Porsche
ECS Tuning recommends this product.

The proper tool to remove difficult-to-reach oxygen sensors affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Schwaben - Corporate Logo
ES#:
240942
Mfg#:
FO-78
Ships on Jun 23, 2026
Auto Notify
ON SALE! SAVE 30%
$48.99

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

$34.29 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Remanufactured Catalytic Converter

ES#2576158 - 18301744162KT - Remanufactured Catalytic Converter - Includes a refundable $50.00 core charge - Genuine BMW - BMW

Includes a refundable $50.00 core charge affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
2576158
Mfg#:
18301744162KT
Ships in 1 day
$7572.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor - Priced Each

ES#3411431 - 11781427884 - Oxygen Sensor - Priced Each - Replace your faulty O2 sensor to eliminate CEL's and Fault Codes - Walker - BMW

Replace your faulty O2 sensor to eliminate CEL's and Fault Codes affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Walker - Corporate Logo
ES#:
3411431
Mfg#:
11781427884
Ships in 1-3 days
$167.99

This product was last offered at the strikethrough price on
04-11-2026

$142.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Universal Catalytic Converter - 2.25"

ES#4005308 - 602205 - Universal Catalytic Converter - 2.25" - 2.25" inlet/outlet, 14" length of converter itself, 6" width & 4" height - Emico - Audi BMW Volkswagen Mercedes Benz MINI Porsche

2.25" inlet/outlet, 14" length of converter itself, 6" width & 4" height affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Emico - Corporate Logo
ES#:
4005308
Mfg#:
602205
Ships in 3 Business Days
$97.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

E9X M3 Oxygen Sensor - Priced Each

ES#2628626 - 11787537984 - E9X M3 Oxygen Sensor - Priced Each - Located on the catalytic converters, 2 required - Bosch - BMW
ECS Tuning recommends this product.

Located on the catalytic converters, 2 required 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#:
2628626
Mfg#:
11787537984
In Stock
$180.99

This product was last offered at the strikethrough price on
04-09-2026

$165.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Catalytic Converter

ES#3102067 - 18327848044 - Catalytic Converter - For cylinders 4-6. - Genuine BMW - BMW

For cylinders 4-6. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine BMW - Corporate Logo
ES#:
3102067
Mfg#:
18327848044
Ships in 2 Business Days
$3616.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor - Priced Each

ES#258921 - 11781735499 - Oxygen Sensor - Priced Each - Restore MPG, clear trouble codes - Bosch - BMW

Restore MPG, clear trouble codes 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#:
258921
Mfg#:
11781735499
In Stock
$82.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Direct-Fit Catalytic Converter

ES#4460777 - 4481664 - Direct-Fit Catalytic Converter - Keep your emissions in check. Primary cat in exhaust manifold. Rated for legal use and resale in California. - Magnaflow - BMW

Keep your emissions in check. Primary cat in exhaust manifold. Rated for legal use and resale in California. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Magnaflow - Corporate Logo
ES#:
4460777
Mfg#:
4481664
EO#:
D-193-139
Ships in 1 Business Day
$3201.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor - Priced Each

ES#4135539 - 11787848486 - Oxygen Sensor - Priced Each - Bosch - BMW

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#:
4135539
Mfg#:
11787848486
In Stock
$209.99

This product was last offered at the strikethrough price on
04-23-2026

$177.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Universal 4-Wire Oxygen Sensor - Priced Each

ES#2532224 - 15733 - Universal 4-Wire Oxygen Sensor - Priced Each - Four wire universal OBD-II Oxygen sensor - Bosch - Audi BMW Volkswagen

Four wire universal OBD-II Oxygen sensor 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#:
2532224
Mfg#:
15733
In Stock
$82.99

This product was last offered at the strikethrough price on
02-16-2026

$74.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor - Priced Each

ES#4135536 - 11787848487 - Oxygen Sensor - Priced Each - Replace your used Oxygen sensor for M3 or M4 - Bosch - BMW

Replace your used Oxygen sensor for M3 or M4 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#:
4135536
Mfg#:
11787848487
In Stock
$200.99

This product was last offered at the strikethrough price on
03-16-2026

$192.98 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

E9X M3 Oxygen Sensor - Black

ES#2226210 - 11787539125 - E9X M3 Oxygen Sensor - Black - Located on the catalytic converters - Bosch - BMW
ECS Tuning recommends this product.

Located on the catalytic converters 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#:
2226210
Mfg#:
11787539125
In Stock
$155.99

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

$111.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Manifold Oxygen Sensor - Rear Position/Post-Cat

ES#11026 - 13951 - Rear Manifold Oxygen Sensor - Rear Position/Post-Cat - Also BMW # 11781406622. Located in the rear position of the exhaust manifold for cylinders 4-6 on the S54 engine - Bosch - BMW

Also BMW # 11781406622. Located in the rear position of the exhaust manifold for cylinders 4-6 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#:
11026
Mfg#:
13951
In Stock
Limited Qty Sale
$208.90

This product was last offered at the strikethrough price on
05-19-2026

$183.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear Manifold Oxygen Sensor - Front Position/Pre-Cat

ES#11024 - 13952 - Rear Manifold Oxygen Sensor - Front Position/Pre-Cat - Also BMW # 11781405324. Located in the front position of the exhaust manifold for cylinders 4-6 on the S54 engine - Bosch - BMW

Also BMW # 11781405324. Located in the front position of the exhaust manifold for cylinders 4-6 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#:
11024
Mfg#:
13952
In Stock at Vendor
$120.99

This product was last offered at the strikethrough price on
12-19-2025

$117.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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

Oxygen Sensor - Priced Each

ES#2767303 - 11787848482 - Oxygen Sensor - Priced Each - Located before the catalytic converter on the longer downpipe. - Genuine BMW - BMW

Located before the catalytic converter on the longer downpipe. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Located in the front upstream position.

Brand:
Genuine BMW - Corporate Logo
ES#:
2767303
Mfg#:
11787848482
Ships in 1 day
17% off MSRP

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

$406.99

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

$335.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Exhaust Emission Parts

Oxygen sensors, catalytic converters, and other critical emissions components not only cause Check Engine Lights when they fail, but they'll also keep you from registering your car. Make sure your emissions system is functioning properly so you can continue to drive your car legally.

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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