Walker Products 250-23073 oxygen sensor for the 1986-1989 Mercedes-Benz 300E 6-cylinder 3.0L, the 1990-1992 300E 6-cylinder 2.6L, the 1991 300E 6-cylinder 3.0L, the 1993 300E 6-cylinder 2.8L and other vehicles measures the oxygen content of the exhaust gas. This upstream narrow-band sensor tracks combustion efficiency through the air-fuel ratio and gives the ECU the diagnostic feedback it expects.
- Electrodes coated with a gas-permeable platinum layer
- Coating guards the electrode surfaces against contamination and erosion from combustion residue and particulates
- Measures oxygen levels to fine-tune the air-fuel ratio and support fuel economy
- Monitors exhaust gases to help reduce pollutants
Quick facts
- Part: Walker Products 250-23073 oxygen sensor
- Fits: the 1986-1989 Mercedes-Benz 300E 6-cylinder 3.0L, the 1990-1992 300E 6-cylinder 2.6L, the 1991 300E 6-cylinder 3.0L, the 1993 300E 6-cylinder 2.8L and other vehicles
- Position: Upstream
- Condition: New
A failing sensor can show up as rough running, higher fuel use, increased exhaust emissions or a lit malfunction indicator lamp. None of these signs alone proves the sensor is at fault, since a damaged wiring harness or connector is another common culprit. This listing is a single sensor, and the upstream position takes one.
Fits
This upstream oxygen sensor is a direct-fit replacement for the 1988-1992 Mercedes-Benz 300CE 6-cylinder 3.0L and the 1988-1992 300TE 6-cylinder 3.0L, along with the 300E runs named above. If your car is not among these, look up its year and engine in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: Upstream
- Quantity per vehicle: 1
- Thread size: M18 - 1.5
Build and materials
- Type: Narrow-band
- Electrodes: gas-permeable platinum layer
- Condition: New
Frequently Asked Questions
Is this the 1990-1992 Mercedes 300E oxygen sensor for the 6-cylinder 2.6L?
Yes. Walker Products 250-23073 fits the 1990-1992 Mercedes-Benz 300E 6-cylinder 2.6L as the upstream sensor, one per car.
Is this Walker Products oxygen sensor narrow-band or wideband?
Narrow-band. It measures the oxygen content of the exhaust gas to track the air-fuel ratio.
Is Walker Products 250-23073 an upstream or downstream oxygen sensor?
Upstream. Walker Products 250-23073 is made for the upstream position, and one sensor is needed there.
What can a failing upstream oxygen sensor do to the engine?
The engine can run poorly, use more fuel, put out higher exhaust emissions or light the malfunction indicator lamp.
What thread size does this oxygen sensor have?
This oxygen sensor has an M18 - 1.5 thread.
