Walker Products 250-21003 oxygen sensor for the 1981-1983 Ford F-150 6-cylinder 4.9L, the 1981-1985 F-150 V8 5.0L or 5.8L and other vehicles measures the oxygen in the exhaust gas. It is a narrow-band sensor made for a specific application and fitment position, and it returns the diagnostic feedback the ECU expects.
- Coating guards the electrode surfaces against contamination and erosion from combustion residue and particulates in the exhaust gases
- Monitors exhaust gases to help reduce pollutants
- Electrodes with a gas-permeable platinum layer
- Tracks the air-fuel ratio for combustion efficiency, which helps fine-tune fuel economy
Quick facts
- Part: Walker Products 250-21003 oxygen sensor
- Fits: 1981-1983 Ford F-150 6-cylinder 4.9L, the 1981-1985 F-150 V8 5.0L or 5.8L and other vehicles
- Position: Upstream, upstream left, upstream right
- Condition: New
A failed sensor can make the engine run poorly, raise fuel consumption or turn on the malfunction indicator light. Before you decide the sensor is at fault, look over the sensor, wiring harness and connector for physical damage with the engine off and cool; damaged wiring also shortens a sensor's life.
Fits
The 1981-1983 Ford F-150 6-cylinder 4.9L, the 1981-1985 F-150 V8 5.0L or 5.8L, the 1980-1986 Ford Mustang 4-cylinder 2.3L, the 1981-1982 Mustang V8 4.2L, the 1984 Mustang V8 5.0L and the 1984-1986 Mustang V6 3.8L take this direct-fit sensor, and so do other vehicles. This listing is one sensor, and these engines take one.
Specifications
Fit and size
- Position: Upstream, upstream left, upstream right
- Thread size: M18 - 1.5
- Quantity per vehicle: 1
Build and materials
- Type: Narrow-band oxygen sensor
- Electrodes: gas-permeable platinum layer
- Coating: protects the electrode surfaces
- Condition: New
Frequently Asked Questions
Is this the right oxygen sensor for a 1981-1985 Ford F-150 V8 5.0L or 5.8L?
Yes. Walker Products 250-21003 fits the 1981-1985 Ford F-150 V8 5.0L or 5.8L and the 1981-1983 F-150 6-cylinder 4.9L. If your vehicle is not one of those, look it up in the "Vehicles it fits" section.
Is this the oxygen sensor for a 1984 Ford Mustang V8 5.0L?
Yes. Walker Products 250-21003 fits the 1984 Ford Mustang V8 5.0L, and this listing is one sensor.
Is the Walker Products 250-21003 an upstream oxygen sensor?
Yes. It is listed for the upstream position, including upstream left and upstream right.
What thread does this narrow-band oxygen sensor have?
This narrow-band oxygen sensor has an M18 - 1.5 thread.
What can a failing oxygen sensor do to the engine?
It can show up as higher exhaust emissions or increased fuel consumption, and newer vehicles store fault codes in the ECU, some of which relate to the sensor.
