How to remove post-catalyst oxygen sensors in M54 six cylinder engine on 2008 BMW X3?

To remove post-catalyst oxygen sensors from the M54 engine, start by removing the brace from the strut towers, followed by the housing for the interior ventilation microfilter. Next, take off the engine covers. Label the oxygen sensor harness connectors and then disconnect them. Raise the vehicle and support it safely, and from underneath the engine, remove the front end reinforcement plate.

Genuine 2008 BMW X3 Oxygen Sensor

Oxygen O2 Sensor

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4 Oxygen Sensors found

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2008 BMW X3 Air Fuel Ratio O2 Oxygen Sensor
Part Number: 11787558055
$256.26 MSRP: $406.30
You Save: $150.04 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Regulating Lambda Probe; Front Oxygen Sensor, Oxygen Sensor
- Item Weight: 0.80 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 11787558055
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following 2008 BMW X3 Submodels:
- 3.0si(E83)
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2008 BMW X3 Oxygen Sensor
Part Number: 11787558073
$256.26 MSRP: $406.30
You Save: $150.04 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Regulating Lambda Probe; Front Oxygen Sensor, Rear Oxygen Sensor
- Item Weight: 0.80 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 11787558073
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following 2008 BMW X3 Submodels:
- 3.0si(E83)
View related parts
2008 BMW X3 O2 Oxygen Sensor
Part Number: 11787545074
$206.77 MSRP: $325.06
You Save: $118.29 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Lambda Monitor Sensor
- Item Weight: 0.80 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 11787545074
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following 2008 BMW X3 Submodels:
- 3.0si(E83)
View related parts
2008 BMW X3 Rear Oxygen Sensor
Part Number: 11787545075
$206.77 MSRP: $325.06
You Save: $118.29 (37%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Lambda Monitor Sensor; Oxygen Sensor
- Position: Rear
- Item Weight: 0.80 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 11787545075
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
More Info
Fits the following 2008 BMW X3 Submodels:
- 3.0si(E83)

2008 BMW X3 Oxygen Sensor

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2008 BMW X3 Oxygen Sensor Parts Questions & Experts Answers

Q:
How to remove post-catalyst oxygen sensors in M54 six cylinder engine on 2008 BMW X3?
Posted by Elfrin C.
A:
To remove post-catalyst oxygen sensors from the M54 engine, start by removing the brace from the strut towers, followed by the housing for the interior ventilation microfilter. Next, take off the engine covers. Label the oxygen sensor harness connectors and then disconnect them. Raise the vehicle and support it safely, and from underneath the engine, remove the front end reinforcement plate.
Answered by BMW Parts Specialist Brad / May 15, 2025