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Get affordable BMW air fuel ratio sensors you deserve. In just 10 minutes, you could save up to 80% with PartsGeek. Save time and dollars on your next wide range air fuel sensors purchase. Over 12 Years of saving people money and providing great customer service. Check our low-cost options today. The average cost for air fuel ratio sensor replacement is between $81.98 and $211.98

BMW Air Fuel Ratio Sensor Reviews
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BMW Replacement Wide Range Air Fuel Sensors

BMW Air Fuel Ratio Sensor No automobile boasts a history of enduring precision that stands up to cars from BMW and that reputation is for good reason. Protect your vehicle's systems by buying only the most reliable high-quality engine parts. When you drive an automobile engineered for high performance it requires top quality auto parts. The Air Fuel Ratio Sensor has a key function: getting the engine to work productively without causing unnecessary emissions.

If your car's ratio of fuel to air is too low, poor engine power will be the result; on the other hand, a too-rich fuel mix can lead to damage to the engine and excessive unburned fuel from your car's exhaust. Because an inaccurate Air Fuel Ratio Sensor can hurt your wallet by running too rich or too lean, fixing it will be economical in the long run. A properly installed Air Fuel Ratio Sensor monitors how much oxygen is feeding your BMW's cylinders. Your Air Fuel Ratio Sensor works in combination with a car or truck's CPU to determine whether or not the air-fuel mix provided to the motor requires to be altered. Your car's Air Fuel Ratio Sensor calculates the air-fuel levels in the motor, keeping them within the suggested ranges for optimum performance.

Shop BMW Wide Range Air Fuel Sensors

Review Fitment Notes
Upstream Denso Air Fuel Ratio Sensor - for 2003 BMW 325i M54 - 234-5137 Click to Enlarge
5 Stars
Denso 234-5137
Air Fuel Ratio Sensor
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Part Number: 234-5137
Brand: Denso
Notes: OE Style -- From 3/03; O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$102.43
(45) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2003 BMW 325i M54
Upstream Denso Air Fuel Ratio Sensor - for 2007 BMW X5 - 234-5139 Click to Enlarge
Website Reviews
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Part Number: 234-5139
Brand: Denso
Notes: OE Style -- Cylinder 1,2,3; O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$98.43
View Details
This Part Fits:
Catalog: B
Vehicle
2007 BMW X5
Upstream Denso Air Fuel Ratio Sensor - for 2007 BMW 335i - 234-5138 Click to Enlarge
Website Reviews
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Part Number: 234-5138
Brand: Denso
Notes: OE Style -- Cylinder 4,5,6; O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$117.43
(10) In Stock
This Part Fits:
Catalog: B
Vehicle
2007 BMW 335i
Upstream Denso Air Fuel Ratio Sensor - for 2004 BMW X3 - 234-5137 Click to Enlarge
5 Stars
Denso 234-5137
Air Fuel Ratio Sensor
Loading Reviews...
Part Number: 234-5137
Brand: Denso
Notes: OE Style -- O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$102.43
(45) In Stock
This Part Fits:
Catalog: B
Vehicle Transmission
2004 BMW X3 Automatic
Upstream Denso Air Fuel Ratio Sensor - for 2006 BMW 325xi - 234-5135 Click to Enlarge
5 Stars
Denso 234-5135
Air Fuel Ratio Sensor
Loading Reviews...
Part Number: 234-5135
Brand: Denso
Notes: OE Style -- To 11/2005; O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$102.43
(78) In Stock
This Part Fits:
Catalog: B
Vehicle
2006 BMW 325xi
Upstream Denso Air Fuel Ratio Sensor - for 2008 BMW 335i - 234-5138 Click to Enlarge
Website Reviews
Loading Reviews...
Part Number: 234-5138
Brand: Denso
Notes: OE Style -- Cylinder 4,5,6; O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$117.43
(10) In Stock
This Part Fits:
Catalog: B
Vehicle
2008 BMW 335i
Upstream Denso Air Fuel Ratio Sensor - for 2013 BMW 328i xDrive - 234-5054 Click to Enlarge
Website Reviews
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Part Number: 234-5054
Brand: Denso
Notes: OE Style -- O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$101.43
(3) In Stock
This Part Fits:
Catalog: B
Vehicle
2013 BMW 328i xDrive
Upstream Denso Air Fuel Ratio Sensor - for 2004 BMW 325i M54 - 234-5137 Click to Enlarge
5 Stars
Denso 234-5137
Air Fuel Ratio Sensor
Loading Reviews...
Part Number: 234-5137
Brand: Denso
Notes: OE Style -- O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$102.43
(45) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2004 BMW 325i M54
Upstream Denso Air Fuel Ratio Sensor - for 2010 BMW M3 - 234-5135 Click to Enlarge
5 Stars
Denso 234-5135
Air Fuel Ratio Sensor
Loading Reviews...
Part Number: 234-5135
Brand: Denso
Notes: OE Style -- O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$102.43
(78) In Stock
This Part Fits:
Catalog: B
Vehicle
2010 BMW M3
Upstream Denso Air Fuel Ratio Sensor - for 2006 BMW 330i - 234-5139 Click to Enlarge
Website Reviews
Loading Reviews...
Part Number: 234-5139
Brand: Denso
Notes: OE Style -- From 11/2005; Cylinder 1,2,3; O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$98.43
View Details
This Part Fits:
Catalog: B
Vehicle
2006 BMW 330i
Upstream Denso Air Fuel Ratio Sensor - for 2006 BMW 325Ci M54 - 234-5137 Click to Enlarge
5 Stars
Denso 234-5137
Air Fuel Ratio Sensor
Loading Reviews...
Part Number: 234-5137
Brand: Denso
Notes: OE Style -- O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$102.43
(45) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2006 BMW 325Ci M54
Upstream Denso Air Fuel Ratio Sensor - for 2006 BMW X3 - 234-5137 Click to Enlarge
5 Stars
Denso 234-5137
Air Fuel Ratio Sensor
Loading Reviews...
Part Number: 234-5137
Brand: Denso
Notes: OE Style -- O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$102.43
(45) In Stock
This Part Fits:
Catalog: B
Vehicle Transmission
2006 BMW X3 Automatic
Upstream Denso Air Fuel Ratio Sensor - for 2003 BMW 325i M56 - 234-5134 Click to Enlarge
Website Reviews
Loading Reviews...
Part Number: 234-5134
Brand: Denso
Notes: OE Style -- O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$99.43
(8) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
2003 BMW 325i M56
Upstream Denso Air Fuel Ratio Sensor - for 2006 BMW 325i - 234-5135 Click to Enlarge
5 Stars
Denso 234-5135
Air Fuel Ratio Sensor
Loading Reviews...
Part Number: 234-5135
Brand: Denso
Notes: OE Style -- To 11/2005; O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$102.43
(78) In Stock
This Part Fits:
Catalog: B
Vehicle
2006 BMW 325i
Upstream Denso Air Fuel Ratio Sensor - for 2010 BMW X5 N52B30A - W0133-2089867 Click to Enlarge
Website Reviews
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Part Number: W0133-2089867
Brand: Denso
Notes: First Time Fit - Before Catalyst : Cylinders 1-3 : Regulating Lambda Probe : 1540mm
Position: Upstream
Condition: New
Shipping Options: Ground, Overnight, 2 Day
List Price:
$365.17
Our Price: $139.58
(6) In Stock
This Part Fits:
Catalog: A
Vehicle Engine
2010 BMW X5 N52B30A
Upstream Left Denso Air Fuel Ratio Sensor - for 2005 BMW 545i - 234-5133 Click to Enlarge
Website Reviews
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Part Number: 234-5133
Brand: Denso
Notes: OE Style -- O.E. Quality Replacement Sensor
Position: Upstream Left
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$98.08
(5) In Stock
This Part Fits:
Catalog: H
Vehicle
2005 BMW 545i
Upstream NGK Air Fuel Ratio Sensor - for 2010 BMW X5 3.0L 6 Cyl GAS - 24333 Click to Enlarge
Website Reviews
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Part Number: 24333
Brand: NGK
Notes: Direct Fit 5-Wire A/F Sensor -- Cylinders 4-6; B2S1; OE Equivalent Design
  • NTK is constantly improving sensor designs to provide excellent performance and improve resistance to failure. NTK works with their OEM manufacturers through each phase of development from concept to production.
  • NTK oxygen sensors heat up rapidly to meet requirements of the vehicle to improve fuel economy and reduce emissions. NTK's proprietary ceramic element overcoat protects against sensor failure.
  • NTK oxygen sensors are equipped with OEM specified connectors and attaching hardware for easy installation. Dual-coated platinum element to increase longevity and ensure the quickest response time.
Position: Upstream
Condition: New
Shipping Options: Ground
$81.98
View Details
This Part Fits:
Catalog: C
Vehicle Engine
2010 BMW X5 3.0L 6 Cyl GAS
Upstream Denso Air Fuel Ratio Sensor - for 2013 BMW 135i - 234-5079 Click to Enlarge
Website Reviews
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Part Number: 234-5079
Brand: Denso
Notes: OE Style -- O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$131.98
(1) In Stock
This Part Fits:
Catalog: T
Vehicle
2013 BMW 135i
Upstream Denso Air Fuel Ratio Sensor - for 2019 BMW X1 - 234-5166 Click to Enlarge
Website Reviews
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Part Number: 234-5166
Brand: Denso
Notes: OE Style -- O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$211.98
(16) In Stock
This Part Fits:
Catalog: P
Vehicle
2019 BMW X1
Upstream Denso Air Fuel Ratio Sensor - for 2011 BMW 528i - 234-5027 Click to Enlarge
Website Reviews
Loading Reviews...
Part Number: 234-5027
Brand: Denso
Notes: OE Style -- Cylinder 4,5,6; O.E. Quality Replacement Sensor
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$209.98
(1) In Stock
This Part Fits:
Catalog: N
Vehicle
2011 BMW 528i

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Some of our Customer Reviews
5 of 5
Verified Customer
3/11/13 05:16 PM - USA

No one I called had the oxygen sensors for my BMW 535xi for less than $250 each. I found them both on the Parts Geek website for the cost of just one of them. - Said Taleb

- 2008 BMW 535xi Air Fuel Ratio Sensor
5 of 5
Verified Customer
12/28/13 01:34 PM - USA

I needed a valve cover gasket set and I was allowed several options with extended warranty besides the one year guaranteed warranty, can't beat that - Laura

- 2004 BMW 525i Air Fuel Ratio Sensor