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Mercedes 420SEL Oxygen Sensor Reviews
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Shop Mercedes 420SEL Replacement Oxygen Sensor

Always be aware that when you own an off-road toy, it's not unheard of to cause damage if you venture off the pavement and repairs aren't always cheap on a vehicle such as the Mercedes 420SEL. To add to the power of your car's engine, think about a few of these optional devices that are especially engineered to raise performance. Outstanding car manufacturers grasp the basic importance of satisfying performance. Your vehicle's Mercedes 420SEL Oxygen Sensor tracks the gas to oxygen ratio by analyzing it to ensure best mileage. When your car or truck's air-fuel ratio is too low, poor performance will be the result; conversely, a fuel-heavy air to fuel ratio can lead to harm to the engine and excessive air pollution from your car or truck's tailpipe. Your Oxygen Sensor is a component of your emissions control system and helps with changes in the air/fuel ratio, removing the necessity for manual altitude adjustments. The oxygen sensor operates in combination with your car's data processor to determine whether the air-fuel mix going to the engine needs to be fine-tuned. Oxygen Sensors are electronic components that are used in the exhaust to increase fuel performance.

We stock these Oxygen Sensor brands for the Mercedes 420SEL: BoschDensoStandard Motor ProductsNGK

Select your 420SEL year

Review Fitment Notes
Showing 17 of 66 Results
Upstream Bosch Oxygen Sensor - for 1991 Mercedes 420SEL 4.2L V8 - 13926 Click to Enlarge
5 Stars
Bosch 13926
Oxygen Sensor
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Part Number: 13926
Brand: Bosch
Notes: Actual OE Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Upstream
Condition: New
Shipping Options: Ground
$53.43
(16) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
1991 Mercedes 420SEL 4.2L V8
Upstream Bosch Oxygen Sensor - for 1989 Mercedes 420SEL 4.2L V8 - 13926 Click to Enlarge
5 Stars
Bosch 13926
Oxygen Sensor
Loading Reviews...
Part Number: 13926
Brand: Bosch
Notes: Actual OE Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Upstream
Condition: New
Shipping Options: Ground
$53.43
(16) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
1989 Mercedes 420SEL 4.2L V8
Upstream Bosch Oxygen Sensor - for 1990 Mercedes 420SEL 4.2L V8 - 13926 Click to Enlarge
5 Stars
Bosch 13926
Oxygen Sensor
Loading Reviews...
Part Number: 13926
Brand: Bosch
Notes: Actual OE Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Upstream
Condition: New
Shipping Options: Ground
$53.43
(16) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
1990 Mercedes 420SEL 4.2L V8
Bosch Oxygen Sensor - for 1987 Mercedes 420SEL - W0133-1603927 Click to Enlarge
Website Reviews
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Part Number: W0133-1603927
Brand: Bosch
Notes: OE Connector
Condition: New
Shipping Options: Ground, Overnight, 2 Day
List Price:
$242.00
Our Price: $102.58
(3) In Stock
This Part Fits:
Catalog: A
Vehicle
1987 Mercedes 420SEL
Upstream Bosch Oxygen Sensor - for 1987 Mercedes 420SEL 4.2L V8 - 13926 Click to Enlarge
5 Stars
Bosch 13926
Oxygen Sensor
Loading Reviews...
Part Number: 13926
Brand: Bosch
Notes: Actual OE Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Upstream
Condition: New
Shipping Options: Ground
$53.43
(16) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
1987 Mercedes 420SEL 4.2L V8
Upstream Bosch Oxygen Sensor - for 1986 Mercedes 420SEL 4.2L V8 - 13926 Click to Enlarge
5 Stars
Bosch 13926
Oxygen Sensor
Loading Reviews...
Part Number: 13926
Brand: Bosch
Notes: Actual OE Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Upstream
Condition: New
Shipping Options: Ground
$53.43
(16) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
1986 Mercedes 420SEL 4.2L V8
Upstream Bosch Oxygen Sensor - for 1988 Mercedes 420SEL 4.2L V8 - 13926 Click to Enlarge
5 Stars
Bosch 13926
Oxygen Sensor
Loading Reviews...
Part Number: 13926
Brand: Bosch
Notes: Actual OE Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Direct Fit includes OE Connector for easy installation
  • Performance meets or exceeds OE specifications
  • True Direct-fit OE connectors and harness
Position: Upstream
Condition: New
Shipping Options: Ground
$53.43
(16) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
1988 Mercedes 420SEL 4.2L V8
Upstream Denso Oxygen Sensor - for 1991 Mercedes 420SEL - 234-3000 Click to Enlarge
5 Stars
Denso 234-3000
Oxygen Sensor
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Part Number: 234-3000
Brand: Denso
Notes: Universal -- O.E. Quality Universal Replacement Sensor
  • Manufactured to the highest O.E. quality, guaranteed to fit right
  • Aluminum oxide trap, this extra layer helps to protect from silicone and lead poisoning
  • Stainless steel housing and porous Teflon filter all contribute to make a long life
  • Improved engine performance and greater fuel efficiency
  • Prevents premature sensor failure
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$38.43
(5) In Stock
This Part Fits:
Catalog: B
Vehicle
1991 Mercedes 420SEL
Upstream Denso Oxygen Sensor - for 1990 Mercedes 420SEL - 234-3000 Click to Enlarge
5 Stars
Denso 234-3000
Oxygen Sensor
Loading Reviews...
Part Number: 234-3000
Brand: Denso
Notes: Universal -- O.E. Quality Universal Replacement Sensor
  • Manufactured to the highest O.E. quality, guaranteed to fit right
  • Aluminum oxide trap, this extra layer helps to protect from silicone and lead poisoning
  • Stainless steel housing and porous Teflon filter all contribute to make a long life
  • Improved engine performance and greater fuel efficiency
  • Prevents premature sensor failure
Position: Upstream
Condition: New
Sensor Type: Heated
Shipping Options: Ground
$38.43
(5) In Stock
This Part Fits:
Catalog: B
Vehicle
1990 Mercedes 420SEL
Bosch Oxygen Sensor - for 1990 Mercedes 420SEL - W0133-1603927 Click to Enlarge
Website Reviews
Loading Reviews...
Part Number: W0133-1603927
Brand: Bosch
Notes: OE Connector
Condition: New
Shipping Options: Ground, Overnight, 2 Day
List Price:
$242.00
Our Price: $102.58
(3) In Stock
This Part Fits:
Catalog: A
Vehicle
1990 Mercedes 420SEL
Bosch Oxygen Sensor - for 1989 Mercedes 420SEL - W0133-1603927 Click to Enlarge
Website Reviews
Loading Reviews...
Part Number: W0133-1603927
Brand: Bosch
Notes: OE Connector
Condition: New
Shipping Options: Ground, Overnight, 2 Day
List Price:
$242.00
Our Price: $102.58
(3) In Stock
This Part Fits:
Catalog: A
Vehicle
1989 Mercedes 420SEL
Bosch Oxygen Sensor - for 1991 Mercedes 420SEL - W0133-1603927 Click to Enlarge
Website Reviews
Loading Reviews...
Part Number: W0133-1603927
Brand: Bosch
Notes: OE Connector
Condition: New
Shipping Options: Ground, Overnight, 2 Day
List Price:
$242.00
Our Price: $102.58
(3) In Stock
This Part Fits:
Catalog: A
Vehicle
1991 Mercedes 420SEL
Bosch Oxygen Sensor - for 1991 Mercedes 420SEL - 007 542 32 17 Click to Enlarge
Website Reviews
Loading Reviews...
Part Number: 007 542 32 17
Brand: Bosch
Notes: Oxygen Sensor
Condition: New
Shipping Options: Ground
$57.73
(8) In Stock
This Part Fits:
Catalog: G
Vehicle
1991 Mercedes 420SEL
Upstream Bosch Oxygen Sensor - for 1987 Mercedes 420SEL 4.2L V8 - 15735 Click to Enlarge
4.6 Stars
Bosch 15735
Oxygen Sensor
Loading Reviews...
Part Number: 15735
Brand: Bosch
Notes: Universal Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Includes Smart Link Connector, no soldering required
  • No special tools required for installation
  • Seared protection tube due to 100% functional quality test
  • Performance meets or exceeds OE specifications
Position: Upstream
Condition: New
Shipping Options: Ground
$43.43
(51) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
1987 Mercedes 420SEL 4.2L V8
Upstream Bosch Oxygen Sensor - for 1986 Mercedes 420SEL 4.2L V8 - 15735 Click to Enlarge
4.6 Stars
Bosch 15735
Oxygen Sensor
Loading Reviews...
Part Number: 15735
Brand: Bosch
Notes: Universal Oxygen Sensor
  • Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions
  • Includes Smart Link Connector, no soldering required
  • No special tools required for installation
  • Seared protection tube due to 100% functional quality test
  • Performance meets or exceeds OE specifications
Position: Upstream
Condition: New
Shipping Options: Ground
$43.43
(51) In Stock
This Part Fits:
Catalog: B
Vehicle Engine
1986 Mercedes 420SEL 4.2L V8
Standard Motor Products Oxygen Sensor - for 1991 Mercedes 420SEL - SG36 Click to Enlarge
Website Reviews
Loading Reviews...
Part Number: SG36
Brand: Standard Motor Products
Notes: Oxygen Sensor -- Universal Upstream
Condition: New
Shipping Options: Ground
$45.08
View Details
This Part Fits:
Catalog: H
Vehicle
1991 Mercedes 420SEL
Upstream NGK Oxygen Sensor - for 1991 Mercedes 420SEL 4.2L V8 - 25726 Click to Enlarge
Website Reviews
Loading Reviews...
Part Number: 25726
Brand: NGK
Notes: Direct Fit Oxygen Sensor -- B1S1; OE Equivalent Design
  • 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.
  • 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 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.
Position: Upstream
Condition: New
Shipping Options: Ground
$82.98
(2) In Stock
This Part Fits:
Catalog: C
Vehicle Engine
1991 Mercedes 420SEL 4.2L V8

Related Fuel Injection Parts

Oxygen Sensors available for the following Mercedes 420SEL years: 1991, 1990, 1989, 1988, 1987, 1986, 91, 90, 89, 88, 87, 86. This part is also sometimes called Mercedes 420SEL O2 Sensor. We stock oxygen sensor parts for most Mercedes models including E320, C230, ML320, C280, E350, S500, CLK320, ML350, 300E, S430, C240, ML430, SL500, CLK430, C300, SLK230, GL450, S550, E430, C320, S420, S320, 190E, E420, SLK320, E55 AMG, C220, E500, S600, ML500, R350, C63 AMG, Sprinter 2500, SL320, 300SE, 500SL, GLK350, 560SEL, CLS550 and CLK350.

Mercedes 420SEL Oxygen Sensor Reviews
5 of 5
Verified Customer
7/10/14 11:33 AM - USA

It arrived quickly. Installed easily. Works well. OK - Bert

- 1989 Mercedes 420SEL Oxygen Sensor