DENSO Auto Parts 234-9108 air / fuel ratio sensor for the 2011-2013 Subaru Forester H4 2.5L and other vehicles reads the air-fuel ratio in the exhaust and reports it to the engine computer. It is a wide-band sensor that sits upstream.
- Laser-welded stainless housing resists corrosion
- PTFE filter blocks contaminants under harsh engine conditions
- Dual-layer protection shields the ceramic element for fast, reliable response times
- Wide-band design with a heated element and 4 wires
Quick facts
- Part: DENSO Auto Parts 234-9108 air / fuel ratio sensor
- Fits: 2011-2013 Subaru Forester H4 2.5L and other vehicles
- Position: Upstream
- Condition: New
A failing air / fuel ratio sensor can show up as a check engine light, rough running or poor fuel economy, though those signs can also come from other faults. Before replacing it, look over the sensor, its wire harness and the connector with the engine off and cool for cracks, melted insulation or damage. A shop can run the electrical tests.
Fits
This direct-fit sensor suits the 2011-2013 Subaru Forester H4 2.5L, the 2010-2011 and 2013 Subaru Impreza H4 2.5L and the 2013-2014 Subaru WRX H4 2.5L. It is built and tested to the strictest OE standards.
Specifications
Fit and size
- Position: Upstream
- Quantity per vehicle: 1
- Wire quantity: 4
- Wiring harness length: 10.63 in
Build and materials
- Sensor type: wide-band, heated
- Housing: laser-welded stainless
- Filter: PTFE
- Grade: standard replacement
- Condition: New
- Country of origin: Japan
In the box
One air / fuel ratio sensor. This listing is a single sensor, which matches the quantity of one per application.
This part cross-references / interchanges with the following part numbers:
18080, 24830, 22641AA590, 250-54064, 350-64020
Frequently Asked Questions
Does the DENSO Auto Parts 234-9108 sensor fit the 2013-2014 Subaru WRX H4 2.5L?
Yes. DENSO Auto Parts 234-9108 is listed for the 2013-2014 Subaru WRX H4 2.5L, and it is a direct-fit sensor made for specific applications.
Is the DENSO Auto Parts air fuel ratio sensor upstream or downstream?
Upstream. DENSO Auto Parts 234-9108 is catalogued for the upstream position and is a wide-band sensor.
How many wires and how long is the harness on this air / fuel ratio sensor?
This sensor has 4 wires and a 10.63 inch wiring harness. It is a heated sensor.
Which signs can point to a failing air / fuel ratio sensor?
A check engine light, poor fuel economy or rough running can be signs, though other faults cause them too. A shop can test the sensor's signal with the right tools.
What protects the ceramic element inside this air / fuel ratio sensor?
A PTFE filter blocks contaminants, and dual-layer protection shields the ceramic element. The laser-welded stainless housing resists corrosion.
