Denso Upstream Air Fuel Ratio Sensor 234-9025 for Honda Accord

Denso 234-9025 is an upstream heated air fuel ratio sensor listed for the 1999 Honda Accord with the F23A4 engine. Denso is the original equipment maker of this sensor.

Part number: 234-9025
Position: Upstream
Condition: New
Our SKU: 234-9025-60597

Add your vehicle above to check this part against it.

$149.43

In stock

Shipping options and cost shown at checkout
Returns accepted on unused parts, see our returns policy
Unsure about fit? Send your VIN before you order

Vehicle fitment

Year	Make	Model	Trim, body and engine
1999	Honda	Accord	F23A4

Rows are what the manufacturer lists for this part. If your trim or engine is missing, contact us with your VIN before ordering.

About this part

An air fuel ratio sensor reads the oxygen content of the exhaust before the catalytic converter so the engine computer can trim fuel delivery. It is more precise than a standard oxygen sensor. Denso builds the 234-9025 with a zirconia solid electrolyte element and a heater, so it starts reading soon after a cold start. Denso is the OE manufacturer of this part. A failing sensor can cause poor mileage, rough running and air fuel ratio codes.

Fitment notes

The 234-9025 is listed for the 1999 Honda Accord with the F23A4 engine, upstream position before the catalytic converter. The F23A4 was the low emissions version of the 2.3L, so check the engine code before ordering. Confirm your car in the fitment table, or send your VIN.

Specifications and features

Position: upstream
Sensor type: heated air fuel ratio
Zirconia solid electrolyte element
OE style, Denso is the OE maker
Engine: F23A4

Installation notes

Work with the exhaust cool. Use an oxygen sensor socket and penetrating oil on a seized sensor. Keep anti-seize off the sensor tip, route the wire clear of the exhaust and clear the codes after fitting.