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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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Oxygen Sensor - Downstream Catalytic Converter

T#:27105147

Part#: 11787589475

In Stock

Sale - Save 20% $ 127.99

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

$ 101.99 USD

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Sale - Save 20%

$ 127.99

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

$ 101.99 USD

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Oxygen Sensor

T#:27105145

Part#: 11787545075

In Stock

Sale - Save 21% $ 113.99

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

$ 90.57 USD

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Sale - Save 21%

$ 113.99

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

$ 90.57 USD

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Oxygen Sensor

T#:27105146

Part#: 11787589121

In Stock

Sale - Save 16% $ 118.99

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

$ 100.00 USD

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Sale - Save 16%

$ 118.99

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

$ 100.00 USD

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Stainless Steel Oxygen Sensor (O2) Weld Bung (M18x1.5mm) - Priced Eac...

T#:637408

Part#: 028092ECS11AKT

In Stock

Sale - Save 25% $ 3.99

This product was last offered at the strikethrough price on
06-14-2026

$ 2.99 USD

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Sale - Save 25%

$ 3.99

This product was last offered at the strikethrough price on
06-14-2026

$ 2.99 USD

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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

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Rear Oxygen Sensor Set - N52, N54

T#:55353594

Part#: 11787545074/5KT2

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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.

Bosch Oxygen Sensor Set - Pre and Post Catalytic Converter - N55 ...

T#:55857772

Part#: 11787589475KT2

In Stock

$ 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.

Front Oxygen Sensor Set - E9x, E82, E88, Z4

T#:55317713

Part#: BFR1/2O2SKT2

In Stock

$ 400.99

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

$ 333.99 USD

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$ 333.99 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 Sensors - Bank 1 And 2 Pre-Cat - N52

T#:56110313

Part#: 11787558055KT

In Stock

$ 307.99

This product was last offered at the strikethrough price on
08-13-2026

$ 304.99 USD

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$ 304.99 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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Oxygen Sensor Kit - F30/31 N47, E70 M57

T#:55569520

Part#: 13628589844KT2

Ships on Oct 15, 2026

Sale - Save 10% $ 770.99

This product was last offered at the strikethrough price on
07-03-2026

$ 693.88 USD

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Sale - Save 10%

$ 770.99

This product was last offered at the strikethrough price on
07-03-2026

$ 693.88 USD

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Oxygen sensors are used by the vehicle computer to adjust the air/fuel ratio and test vehicle emissions. This kit includes both rear Sensors.

Front Oxygen Sensor - Bank 1 Pre-Cat

T#:54780515

Part#: 11787558055

Ships on Oct 19, 2026

$ 99.99 USD

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$ 99.99 USD

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02 SENSOR BUNG (WELD-ON TYPE) 304 STAINLESS STEEL (M18x1.5mm) ...

T#:47439371

Part#: 02SB1815

Ships on Mar 15, 2027

Sale - Save 39% $ 3.99

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

$ 2.44 USD

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Qty

Sale - Save 39%

$ 3.99

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

$ 2.44 USD

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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

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