Walker Products 250-21009 oxygen sensor for the 1984-1985 Honda Accord 4-cylinder 1.8L, the 1986-1989 Accord 4-cylinder 2.0L and other vehicles measures the oxygen in the exhaust gas. It is a direct-fit, narrow-band sensor for the upstream position, and the oxygen reading shows how efficiently combustion is running.
- Made for its specific application and fitment position, with the diagnostic feedback the ECU needs
- Electrodes made of a gas-permeable platinum layer
- Coating prevents contamination and erosion of the electrode surfaces by combustion residue and particulates
- Measures oxygen levels to help fine-tune the air-fuel mixture and support fuel economy
- Monitors exhaust gases to help reduce pollutants
Quick facts
- Part: Walker Products 250-21009 oxygen sensor
- Fits: the 1984-1985 Honda Accord 4-cylinder 1.8L, the 1986-1989 Accord 4-cylinder 2.0L and other vehicles
- Position: Upstream, upstream front, upstream rear
A failing sensor can show up as rough running, higher fuel consumption, higher exhaust emissions or a lit malfunction indicator light. Those signs alone do not prove the sensor is at fault, since a vacuum leak can produce similar symptoms. The sensor, wiring harness and connector should also be checked for physical damage.
Fits
The 1984-1985 Honda Accord 4-cylinder 1.8L, the 1986-1989 Accord 4-cylinder 2.0L and the 1988-1991 Honda Civic 4-cylinder 1.5L or 1.6L all fit this oxygen sensor, as do many other vehicles.
Specifications
Fit and size
- Position: Upstream, upstream front, upstream rear
- Fit type: Direct fit
- Quantity per vehicle: 1
- Thread size: M18 - 1.5
Build and materials
- Type: Narrow-band
- Electrodes: gas-permeable platinum layer
In the box
One oxygen sensor. The fitment lists a quantity of one for each application.
Frequently Asked Questions
Is this Honda Accord oxygen sensor right for the 1984-1985 Accord 4-cylinder 1.8L and the 1986-1989 Accord 4-cylinder 2.0L?
Yes. Walker Products 250-21009 fits the 1984-1985 Honda Accord 4-cylinder 1.8L and the 1986-1989 Accord 4-cylinder 2.0L, with a fitment quantity of one.
Can I use this Suzuki Samurai oxygen sensor on a 1986-1995 Samurai 4-cylinder 1.3L?
Yes, the 1986-1995 Suzuki Samurai 4-cylinder 1.3L is on the fitment list. If your car is a different one, look up its year and engine in the "Vehicles it fits" section.
Is the Walker Products 250-21009 a narrow-band or wideband oxygen sensor?
Walker Products 250-21009 is a narrow-band, direct-fit sensor with an M18 - 1.5 thread.
Does the ECU store a code when this upstream oxygen sensor fails?
Newer vehicles store fault codes in the ECU, and some relate to the affected sensor and its associated systems. A shop can read those codes for you.
What protects the electrodes in this Walker Products oxygen sensor from exhaust deposits?
The sensor's coating guards the electrode surfaces against contamination and erosion from combustion residue and particulates in the exhaust gases.
