22690AA900 Subaru SEN ASSY-OXYGEN, Price: 102.20$, Weight: 0.348kg
| Make | Number | Name | Availability | Weight, kg | Ship in, Days | Price |
|---|---|---|---|---|---|---|
Subaru |
22690AA900 |
SEN ASSY-OXYGEN |
4 |
0.348 |
7-10 |
102.20$ |
Originals
| Make | Number | Name | Availability | Weight, kg | Processing, days | Price | |
|---|---|---|---|---|---|---|---|
| Subaru |
SEN ASSY-OXYGEN
|
0 |
0.4
|
-
|
105.56$
|
Not Available |
Oxygen Sensor Assembly for Subaru Engine Management 🔧
This oxygen sensing unit is a key part of the fuel injection control system. It measures the oxygen level in the exhaust stream and sends a live signal to the ECU. With this data, the ECU fine-tunes air/fuel ratio to keep the engine running clean, strong, and fuel-efficient.
Why this part is needed ✅
Modern Subaru engines rely on accurate exhaust feedback to meet emissions targets and protect the catalytic converter. A healthy sensor helps stabilize idle, improve throttle response, and reduce fuel waste.
How it works ⚙️
The sensing element reacts to oxygen content in exhaust gas and generates a changing voltage/resistance signal. The ECU uses this feedback in closed-loop operation to adjust injector pulse width, keeping combustion near ideal.
What happens if it fails 🚨
If the sensor becomes slow, contaminated, or electrically open, the ECU may default to a safe map. Common results include higher fuel consumption, rough idle, hesitation, black soot at the tailpipe, catalytic converter overheating, and a check engine light. Long-term driving with a faulty sensor can damage the cat and increase emissions.
Compatibility
- Impreza
- Forester