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BMW 335i Exhaust Emission Parts

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Rear Oxygen Sensor Set

Sluggish O2 sensors don't just trigger annoying Check Engine Lights; they cause poor fuel economy, rough idling, and can even degrade your expensive catalytic converters over time. 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
5481204
Mfg#:
11787545074/5KT
In Stock
$366.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Front Oxygen Sensor Set

Over time, factory oxygen sensors degrade from extreme exhaust heat and carbon buildup, leading to poor fuel economy, lost performance, and failed emissions tests. 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
5481192
Mfg#:
BFR1/2O2SKT
In Stock
$400.99

This product was last offered at the strikethrough price on
07-14-2026

$337.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor Set - Pre and Post Catalytic Converter

Is your BMW or MINI throwing a pesky check engine light, suffering from a rough idle, or guzzling fuel like it's track day? Over time, factory oxygen sensors degrade from extreme exhaust heat and carbon buildup, sending lazy signals to your DME. 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
5481272
Mfg#:
11787589475KT
In Stock
$335.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Direct-Fit Catalytic Converter - Cyl 4-6

ES#4491417 - 557769 - Direct-Fit Catalytic Converter - Cyl 4-6 - 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. For California Emissions

Brand:
Magnaflow - Corporate Logo
ES#:
4491417
Mfg#:
557769
Ships in 1 Business Day
$1119.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Remanufactured Catalytic Converter

ES#2678326 - 18307597063KT - Remanufactured Catalytic Converter - Priced includes refundable $50 core charge - Genuine BMW - BMW

Priced includes refundable $50 core charge

Brand:
Genuine BMW - Corporate Logo
ES#:
2678326
Mfg#:
18307597063KT
Ships in 4 Business Days
$4260.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Downpipe Exhaust Gasket - Priced Each

Located between downpipe and mid-pipes, 2 required 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
5470577
Mfg#:
18307553603
Ships on Sep 28, 2026
Auto Notify
ON SALE! SAVE 20%
$17.99

This product was last offered at the strikethrough price on
05-29-2026

$14.39 USD
This product is lifetime replacement eligible Lifetime Replacement

Front Oxygen Sensor - Bank 1 Pre-Cat

Fuel control and emissions control sensor 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
5480567
Mfg#:
11787558055
Ships on Oct 19, 2026
Auto Notify
$99.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor

740mm. Front O2 sensor/Lambda probe 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
5491432
Mfg#:
11787596924
Ships on Nov 19, 2026
Auto Notify
$125.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Oxygen Sensor - Bank 2, Pre-Cat

ES#4900503 - 11787558087 - Oxygen Sensor - Bank 2, Pre-Cat - Restore the performance and reliability of your BMW with this essential emissions component from Meyle. - Meyle - BMW

Restore the performance and reliability of your BMW with this essential emissions component from Meyle. 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
4900503
Mfg#:
11787558087
Special Order: No Guaranteed ETA
$151.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Rear Oxygen Sensor - Bank 1 Post-Cat

ES#4487460 - 11787545074 - Rear Oxygen Sensor - Bank 1 Post-Cat - Fuel control and emissions control sensor - Meyle - BMW
ECS Tuning recommends this product.

Fuel control and emissions control sensor 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
4487460
Mfg#:
11787545074
Special Order: No Guaranteed ETA
$116.99 USD
Free Shipping
on orders $49 and up

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

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Manufacturer names and/or part numbers are used only for identification purposes.

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