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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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OEM Bosch Oxygen Sensor - Cyl. 1-3 -before catalytic converter - E46 E60 X3
OEM Bosch Oxygen Sensor - Cyl. 1-3 -before catalytic converter - E46 ...
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Bosch - Corporate Logo
T#:3303
Part#: 11787523434
In Stock
Sale - Save 22% $ 210.65

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

$ 165.00 USD
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Sale - Save 22%
$ 210.65

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

$ 165.00 USD
Free Shipping
Add to Wish List
This is the pre-cat oxygen sensor for bank 1 - cylinders 1-3 for BMW E46 E60 E83 X3 Bosch # 17 215.

This item fits the following BMWs:
3/2003-2005 E46 BMW 325i 325ci 325xi with M54 engine.
3/2003-2005 E46 BMW 330i 330ci 330xi
2004-2005 E60 BMW 525i 530i
2004-2006 E83 BMW X3 3.0i - Automatic Transmission Only
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Bosch Oxygen Sensor - Front
Bosch Oxygen Sensor - Front
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Bosch - Corporate Logo
T#:384615
Part#: 11787589121
In Stock
Sale - Save 34% $ 197.99

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

$ 131.43 USD
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Sale - Save 34%
$ 197.99

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

$ 131.43 USD
Free Shipping
Add to Wish List
Fuel control and emissions sensor
Stainless Steel Oxygen Sensor (O2) Weld Bung (M18x1.5mm) - Priced Each
Stainless Steel Oxygen Sensor (O2) Weld Bung (M18x1.5mm) - Priced Eac...
ECS - Corporate Logo
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
Free Shipping on orders $49 and up
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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
Free Shipping on orders $49 and up
Add to Wish List

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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