Bosch 15028 rear oxygen sensor for the 2005 Subaru Outback H4 2.5L, the 2005-2009 Outback H6 3.0L, the 2010-2014 Outback H6 3.6L and other vehicles measures oxygen in the exhaust and reports air-fuel-ratio readings to the ECU. Those readings help the ECU hold stable combustion and keep emissions down.
- Heated narrow-band switching-type sensor with an integrated heater element
- Metal housing and TSP coating to resist vibration, corrosion and contamination
- Built to withstand exhaust streams up to 1,880°F
- Reaches operating temperature in under 10 seconds for quick closed-loop control
- Ceramic elements and optimized heater control for steady output under heat and vibration
Quick facts
- Part: Bosch 15028 oxygen sensor
- Fits: 2005 Subaru Outback H4 2.5L, the 2005-2009 Outback H6 3.0L, the 2010-2014 Outback H6 3.6L and other vehicles
- Position: Downstream, downstream rear
- Material: Metal housing
- Condition: New
A check-engine light, poor fuel economy or a rough idle can come from a worn sensor, and from other faults as well. With the engine off and cool, look over the wiring and connector for cracks or melted insulation; live readings are a job for a shop. Track down the cause first. If this sensor is at fault, this one replaces it.
Fits
The vehicles it fits include the 2009-2013 Subaru Forester H4 2.5L and the 2013-2014 Subaru WRX H4 2.5L, along with the Outback runs named above. This listing is one sensor: the H4 2.5L cars take one, while the 2005-2009 Outback H6 3.0L and the 2010-2014 Outback H6 3.6L take two. To see whether your own car is covered, search for it in the "Vehicles it fits" section.
Specifications
Fit and size
- Position: Downstream, downstream rear
- Quantity per vehicle: 1 on H4-2.5L engines, 2 on H6-3.0L and H6-3.6L engines
- Thread size: M18 - 1.5
- Hex size: 22 mm
- Length (sealing surface to end of connector): 17.5 in
Build and materials
- Type: Narrow-band heated oxygen sensor
- Heated: Yes
- Housing material: Metal
- Condition: New
- Warranty: Bosch 1-year, unlimited-mileage warranty for non-commercial passenger cars and light trucks
In the box
One oxygen sensor with its wiring harness. A mounting bracket is not included.
Installation notes
- Conductive anti-seize is pre-applied to the threads.
- Direct-fit connectors are built for quick installation.
Frequently Asked Questions
Is this the Subaru WRX oxygen sensor for the 2013-2014 Subaru WRX H4 2.5L?
Yes. Bosch 15028 is listed for the 2013-2014 Subaru WRX H4 2.5L as a downstream rear sensor, and that engine takes one.
Is this the 2005 Subaru Outback oxygen sensor for the H4 2.5L engine?
Yes. The 2005 Subaru Outback H4 2.5L takes one of these sensors, while the 2005-2009 Outback H6 3.0L takes two.
Is this Bosch O2 sensor heated?
Yes. Bosch 15028 is a heated narrow-band switching-type oxygen sensor with an integrated heater element.
Does this Bosch premium oxygen sensor come with a wiring harness and anti-seize?
Yes, the wiring harness is included and the threads come with pre-applied conductive anti-seize; a mounting bracket is not included.
What size should I compare when matching this rear oxygen sensor?
This sensor measures 17.5 in from the sealing surface to the end of the connector, with an M18 - 1.5 thread and a 22 mm hex.
