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Bosch Oxygen Sensor; Rear; OE Version; Four Wire; Heated; 990mm | 15109

BMW X5, 328i, X3, 325i, 528i, 530i, 330i, Z3, 330Ci, 525i & more
Land Rover Range Rover
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Make Sure It Fits

P/N: 15109 Bosch OEM
Rear; OE Version; Four Wire; Heated; 990mm
Recommended replacement interval: 100,000 miles. 2 per car.
Cross References:
  • 0258005109
  • 11781433940
  • BSMHK000220
  • MHK000220
  • W01331607575

Oxygen (O2) sensors are emissions control sensors that detect levels of oxygen in an engine's exhaust. When the element inside the O2 sensor heats up, oxygen flowing through the sensor causes the element to create electricity. This electrical current is sent to the engine's computer and converted to an oxygen level reading. Some O2 sensors are equipped with a heating element to speed up the oxygen-sensing process, while others rely on the engine's exhaust to heat them.

O2 sensors are one of the more commonly failed sensors in an emissions control system. Continuous exposure to exhaust temperatures ranging from 300°-700° Fahrenheit over time causes the sensor element to lose its ability to create voltage, making the sensor give incorrect readings. When this happens, the engine computer operates the fuel injectors on preset fault parameters and turns the check engine light on with a fault code. If an O2 sensor behind the catalytic converter fails, the ECM may turn on the check engine light with a fault code for the catalytic converter because the faulty O2 sensor reading gives the appearance that the catalytic converter is not functioning.

Failed O2 sensors will often result in a lack of engine power that is not usually noticed but a decrease in fuel economy, that is. If your check engine light is on and your vehicle is driving normally, you should still have the fault code checked, as it could very well be an O2 sensor that failed and is causing your vehicle to consume excessive fuel.

View more Bosch O2 Sensors.

Bosch is the world's largest supplier of components to the automotive industry. The Bosch product line includes alternators & starters, brakes, electronic controls and sensors, fuel system parts and management, ignition system components, and steering system components. All Bosch automotive parts are either OEM (Original Equipment Manufacturer) or made to their specs as a replacement part for the OEM unit.
Left = Driver side and Right = Passenger side.
All parts are priced individually unless identified as a set or kit. "Per car" notes identify how many of a given part your car has and "Left/Right or Front/Rear" notes means the part fits the left or right side of the car. These parts are still sold individually and you'll need to select the appropriate quantity if you plan to replace more than one of this item.

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What This Bosch Oxygen Sensor Fits?

Application information below is for reference only and should not be used to determine the exact vehicle fitment. Please use the "Make Sure It Fits" vehicle selection box above to determine the exact fitment and review any application notes. If you need any help determining if this part works with your vehicle, please don't hesitate to contact us.

00-00 - 323Ci
99-00 - 323i E46
00-00 - 323i Sport Wagon
01-02 - 325Ci
03-03 - 325Ci
For models with production date through 2/2003.
01-02 - 325i
03-03 - 325i
For models with production date through 2/2003.
01-02 - 325i Sport Wagon
03-03 - 325i Sport Wagon
For models with production date through 2/2003.
01-04 - 325xi
05-05 - 325xi
Rear ~ Length=990mm; Manufacturer Body Code: E46
01-04 - 325xi Sport Wagon
00-00 - 328Ci
99-00 - 328i E46
98-98 - 328i
Rear ~ Length=990mm; Manufacturer Body Code: E46
98-98 - 328iC
Rear ~ Length=990mm; Manufacturer Body Code: E46
01-02 - 330Ci
05-05 - 330Ci
Rear ~ Length=990mm; Manufacturer Body Code: E46
03-03 - 330Ci
For models with production date through 2/2003.
Land Rover
03-05 - Range Rover HSE