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Oxygen Sensors

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.
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Rear Oxygen Sensor Set - N52, N54
Rear Oxygen Sensor Set - N52, N54
Packaged by Turner - Corporate Logo
T#:55353594
Part#: 11787545074/5KT2
In Stock
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$ 366.99 USD
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$ 366.99 USD
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Sluggish oxygen sensors do a lot more than just light up your dashboard with an annoying Check Engine Light—they directly choke your BMW’s performance.
Front Oxygen Sensor Set - E9x, E82, E88, Z4
Front Oxygen Sensor Set - E9x, E82, E88, Z4
Packaged by Turner - Corporate Logo
T#:55317713
Part#: BFR1/2O2SKT2
In Stock
New Item
$ 400.99

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

$ 337.99 USD
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$ 337.99 USD
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Over time, that degradation robs your BMW of its crisp throttle response, tanks your fuel economy, and leaves you staring at a failed emissions ticket
Bosch Oxygen Sensor Set - Pre and Post Catalytic Converter - N55
Bosch Oxygen Sensor Set - Pre and Post Catalytic Converter - N55 ...
Packaged by Turner - Corporate Logo
T#:55857772
Part#: 11787589475KT2
In Stock
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$ 335.99 USD
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$ 335.99 USD
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Extreme exhaust heat and carbon buildup degrade your factory oxygen sensors over time, sending lazy data to your DME and robbing you of performance.
Bosch Oxygen Sensors - Bank 1 And 2 Pre-Cat - N52
Bosch Oxygen Sensors - Bank 1 And 2 Pre-Cat - N52
Packaged by Turner - Corporate Logo
T#:56110313
Part#: 11787558055KT
In Stock
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$ 307.99 USD
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$ 307.99 USD
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Your engine's air fuel ratio needs to be dead on. Worn out factory pre-cat oxygen sensors delay vital data to the DME, leading to sub optimal fueling, lost horsepower, and dangerous hesitation under load.
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O2 Sensor Bung and Plug
O2 Sensor Bung and Plug
Packaged by Turner - Corporate Logo
T#:339000
Part#: TEN9949O2S
Ships in 6 Business Days
Starting at $ 12.95 USD
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Starting at $ 12.95 USD
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This weld-in bung allows an O2 sensor to be screwed into your exhaust system. It's required for custom exhaust systems, and is also useful for air/fuel ratio measurements when dyno testing.
Febi Rear Oxygen Sensor - Bank 1 Post-Cat
Febi Rear Oxygen Sensor - Bank 1 Post-Cat
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Febi - Corporate Logo
T#:16375111
Part#: 11787526262
Special Order: No Guaranteed ETA
$ 124.99 USD
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$ 124.99 USD
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The oxygen sensor is vital to the performance and drivability of your car. The engine computer relies on data from the sensor to make adjustments in engine efficiency and performance. When your BMW oxygen sensor fails, the computer can no longer sense the air/fuel ratio, so it ends up guessing -- resulting in poor performance, poor gas mileage, and increased pollution. Make sure your BMW engine performs as it should, and doesn't use more fuel than it needs to, by simply changing your oxygen sensor today. There is no lifespan on O2 sensors but there are several fault codes that indicate a failed sensor (O2 monitoring, cat efficiency, O2 heating circuit, O2 readiness, and others). The O2 sensor is heated and has a self-calibration feature so once you get the codes or feel performance has suffered, a new sensor is a good starting point to get you back to peak performance. Febi's Oxygen sensors are high quality and will give you the longest and best performance for the price.
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Oxygen Sensor
Oxygen Sensor
Febi - Corporate Logo
T#:56254844
Part#: 11787512973
Special Order: No Guaranteed ETA
New Item
$ 62.99 USD
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$ 62.99 USD
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Maintain peak engine performance and precise air/fuel ratio telemetry with the Febi Bilstein Heated Oxygen Sensor.
Upstream NOx Sensor
Upstream NOx Sensor
Febi - Corporate Logo
T#:56254774
Part#: 13628589846
Special Order: No Guaranteed ETA
New Item
$ 312.99 USD
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$ 312.99 USD
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Maintain peak performance and emissions compliance on your BMW with this replacement upstream NOx sensor by Febi Bilstein.
Oxygen Sensor
Oxygen Sensor
Febi - Corporate Logo
T#:56254780
Part#: 11787836451
Special Order: No Guaranteed ETA
New Item
$ 63.99 USD
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$ 63.99 USD
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This Febi Bilstein oxygen sensor is designed as a direct OEM-spec replacement to keep your engine management system operating with pin-point accuracy.
Oxygen Sensor
Oxygen Sensor
Febi - Corporate Logo
T#:56254778
Part#: 11781743994
Special Order: No Guaranteed ETA
New Item
$ 62.99 USD
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$ 62.99 USD
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This Febi Bilstein Oxygen Sensor provides a high-quality OEM replacement option built to precise vehicle specifications.

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