22641AA400 Subaru SEN AY-A/F RATIO, Price: 176.36$, Weight: 0.118kg
| Make | Number | Name | Availability | Weight, kg | Ship in, Days | Price |
|---|---|---|---|---|---|---|
Subaru |
22641AA400 |
SEN AY-A/F RATIO |
0 |
0.118 |
7-10 |
176.36$ |
| Not Available | ||||||
Originals
| Make | Number | Name | Availability | Weight, kg | Processing, days | Price | |
|---|---|---|---|---|---|---|---|
| Subaru |
SEN AY-A/F RATIO
|
0 |
0.136
|
-
|
169.45$
|
Not Available |
Compatibility
| Body | Engine | Vehicle Grade | Market | Model Year From | Model Year To | Suspension | Diagram |
|---|---|---|---|---|---|---|---|
| ﾜｺﾞﾝ | 1.5L EMPI DOHC NA | 15R | Japan | 04.2006 | 04.2007 | ﾉｰﾏﾙｻｽﾍﾟﾝｼﾖﾝ | View |
Air/Fuel Ratio Sensor for Subaru
This sensor is a key part of the engine management system. It measures how much oxygen is left in the exhaust and helps the ECU set the correct fuel delivery. When the mixture is right, you get smooth power, clean emissions, and better fuel economy 🚗.
Why this part is needed
Modern Subaru engines rely on fast, accurate mixture feedback. This sensor keeps the air-to-fuel ratio in the safe zone during idle, cruising, and acceleration. It also helps protect the catalytic converter from overheating caused by a rich mixture.
How it works
The sensing element reacts to exhaust oxygen content and sends a precise signal to the ECU. The ECU then adjusts injector pulse width in real time. A built-in heater brings the sensor up to operating temperature quickly, improving cold-start performance ❄️.
What happens if it’s broken
A faulty sensor can cause rough idle, hesitation, higher fuel consumption, failed emissions tests, and catalyst damage. You may see a check engine light and long-term fuel trims drifting out of range. Leaving it unchecked can lead to expensive downstream repairs ⚠️.
Compatible Models
- Impreza