22690AA640 Subaru SEN ASSY-OXYGEN, Price: 127.09$, Weight: 0.348kg
| Make | Number | Name | Availability | Weight, kg | Ship in, Days | Price |
|---|---|---|---|---|---|---|
Subaru |
22690AA640 |
SEN ASSY-OXYGEN |
0 |
0.348 |
2-3 |
127.09$ |
| Not Available | ||||||
Compatibility
Reliable Oxygen Sensor Assembly for Subaru Exhaust Systems
This exhaust oxygen sensor assembly is a key part of the engine management system. It is needed to measure leftover oxygen in the exhaust gas so the ECU can adjust the air/fuel mixture in real time. When the mixture is correct, your Subaru runs smoother, uses less fuel, and keeps emissions under control ✅
How It Works
The sensor sits in the exhaust stream and produces a voltage signal based on oxygen content. The ECU reads this signal and fine-tunes injector pulse and fuel trims. Many units also use an internal heater to reach operating temperature fast, helping cold-start performance and reducing warm-up emissions
What Happens If It Fails
A weak or dead sensor can cause a check engine light, rough idle, poor acceleration, higher fuel consumption, and a failed emissions test. Over time, running too rich can damage the catalytic converter, while running too lean can raise engine temperature and lead to hesitation or misfire ⚠️