Give your ECU precise exhaust-oxygen feedback with this Bosch sensor, part number 13256, a premium switching-type, heated narrow-band oxygen sensor that sends accurate air-fuel-ratio readings to the ECU to support stable combustion control. It fits many vehicles, among them the 2003-2007 Honda Accord (V6-3.0L), 2005-2008 Honda Pilot (V6-3.5L) and 2005-2010 Honda Odyssey (V6-3.5L). See the "Vehicles it fits" section for the full list. Bosch catalogs it for upstream, downstream left and downstream front positions, depending on the application.
- Precise feedback: Delivers accurate air-fuel-ratio feedback to the ECU, helping the engine run efficiently and supporting lower emissions.
- Fast response: The heated sensor reaches operating temperature in under 10 seconds, giving the ECU a fast signal for quick closed-loop control after a cold start.
- Built for heat: Built to withstand exhaust streams up to 1,880°F, with TSP coating to resist vibration, corrosion and contamination.
- Easy install: Direct-fit connector and pre-applied conductive anti-seize on the threads.
Bosch invented the oxygen sensor and has supplied OE manufacturers for more than 50 years. This Bosch O2 sensor is a specific-fit, standard replacement unit with a metal housing, an M18 x 1.5 thread and a 22 mm hex. It has a 4-wire harness measuring 14.8 in, a male rectangular connector with 4 male blade terminals, an overall length of 18.5 in, and 17.3 in from the sealing surface to the end of the connector. The wiring harness is included. A mounting bracket is not included.
Sold individually. The number of sensors needed varies by application and position. The sensor is backed by Bosch's 1-year, unlimited-mileage warranty for non-commercial passenger cars and light trucks. Country of origin: United States.
Frequently Asked Questions
Is this the right Honda Accord oxygen sensor for a 2003-2007 Honda Accord 3.0L?
Bosch 13256 is listed for the 2003-2007 Honda Accord with the V6-3.0L engine. Use the "Vehicles it fits" section to match your year and the sensor position you need.
What does a switching-type oxygen sensor do?
It measures oxygen in the exhaust and sends a switching signal to the ECU, which uses it to adjust the air-fuel ratio. The built-in heater helps it reach operating temperature quickly.
What are the key specs of the Bosch 13256?
It is a heated narrow-band sensor with an M18 x 1.5 thread, a 22 mm hex and 4 wires. It has a male rectangular connector with blade terminals and a 14.8 in wiring harness.
Does it come ready to install?
The wiring harness is included, the connector is direct-fit, and the threads carry pre-applied conductive anti-seize. A mounting bracket is not included.
What are signs an oxygen sensor may need replacing?
Common signs include a check engine light, reduced fuel economy, a rough idle or a failed emissions test. These can have other causes, so diagnose the system before replacing the sensor.
