Oxygen Sensors for BMW E30 M3 S14 2.3L

Clear BMW chassis

Please ensure your correct model is selected

Oxygen sensors constantly monitor engine emissions and relays this data to the DME. Using these readings the computer determines the proper air/fuel mixture as well as how efficiently the catalyst system is functioning. Symptoms of a failed oxygen sensor range from an EML to poor fuel economy and severe loss of power. A failed upstream sensor will typically cause the engine to run poorly and a failed downstream sensor will typically present as a catalyst efficiency code.
Sort By:

Schwaben 7/8"(22mm) Flexible Oxygen Sensor Wrench
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Schwaben - Corporate Logo
T#:368923
Part#: FO-78
Ships on Jun 23, 2026
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
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
The Schwaben oxygen sensor wrench has a six-point pivot head to provide a secure grip on stubbornly tight oxygen sensors located in awkward, inaccessible locations.
OEM Bosch Oxygen Sensor -- E30 M3
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Bosch - Corporate Logo
T#:3454
Part#: 11781310838
In Stock at Vendor
$ 146.47 USD
Free Shipping
$ 146.47 USD
Free Shipping

A new oxygen sensor can improve driveability and lengthen engine life. Ultimately, you achieve a smoother running engine that is more fuel efficient. Feedback from the oxygen sensor provides closed-loop control of the injected quantity of fuel for optimum air-fuel mixture, enabling virtually complete combustion to take place. Contaminants in gas and certain atmospheric conditions can drastically shorten the life of any oxygen sensor, therefore they should be checked with every periodic maintenance and changed if necessary.

This is the OEM Bosch oxygen sensor for E30 BMW's with the S14 engine. This sensor is mounted in the manifold before the catalytic converter. OEM replacement for BMW # 11781310838.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

Show More Show Less
Stainless Steel Oxygen Sensor (O2) Weld Bung (M18x1.5mm) - Priced Eac...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
ECS - Corporate Logo
T#:637408
Part#: 028092ECS11AKT
In Stock
Sale - Save 25% $ 3.99

This product was last offered at the strikethrough price on
05-03-2026

$ 2.99 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 3.99

This product was last offered at the strikethrough price on
05-03-2026

$ 2.99 USD
Free Shipping on orders $49 and up

Upgrade your exhaust system with the Stainless Steel Oxygen Sensor (O2) Weld Bung (M18x1.5mm). This high-quality weld bung is made from stainless steel, ensuring durability and resistance to corrosion. It features M18x1.5mm threads, making it compatible with most oxygen sensors. Perfect for custom exhaust setups or replacing damaged bungs, this weld bung is a must-have for any automotive enthusiast.

  • Made from high-quality stainless steel for durability and corrosion resistance
  • M18x1.5mm threads ensure compatibility with most oxygen sensors
  • Ideal for custom exhaust setups or replacing damaged bungs
  • Essential for automotive enthusiasts looking to upgrade their exhaust system
Show More Show Less

02 SENSOR BUNG (WELD-ON TYPE) 304 STAINLESS STEEL (M18x1.5mm) ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bremmen Parts - Corporate Logo
T#:47439371
Part#: 02SB1815
Ships on Jan 5, 2027
New Item
Sale - Save 39% $ 3.99

This product was last offered at the strikethrough price on
05-03-2026

$ 2.44 USD
Free Shipping on orders $49 and up
Sale - Save 39%
$ 3.99

This product was last offered at the strikethrough price on
05-03-2026

$ 2.44 USD
Free Shipping on orders $49 and up

Easily add an oxygen sensor to your custom exhaust setup with this universal O2 sensor bung. Designed for simple weld-on installation, it allows you to place your sensor exactly where you need it—perfect for custom builds, exhaust modifications, or performance tuning projects.

Features:

CNC-cut from T304 Stainless Steel for corrosion resistance
Threaded for M18x1.5mm RH oxygen sensors

Show More Show Less