Mass Airflow Sensor — Audi A4
Category: Engine | Severity: medium | Cost: ₹7,000–₹25,000
What is Mass Airflow Sensor?
MAF sensor measures the amount of air entering the engine.
How Mass Airflow Sensor Works
Sends airflow data to ECU to adjust fuel injection.
Why is Mass Airflow Sensor Important?
Ensures proper air-fuel ratio.
Common Problems
- Sensor failure
- Dirty sensor
Symptoms
- Check engine light
- Poor mileage
- Engine hesitation
Causes of Failure
- Dust contamination
- Electrical faults
Impact on Car Performance
Incorrect readings reduce efficiency and power.
DIY Fix Guide — Step by Step
- Clean sensor using MAF cleaner
- Check wiring
- Scan ECU
Maintenance Tips
- Keep air filter clean
Replacement Cost in India
Estimated range: ₹7,000 – ₹25,000
Where to Buy Online
When to Replace Mass Airflow Sensor
Replace if sensor fails or gives incorrect readings.