Mass Airflow Sensor for BMW M4 CS — Price, Symptoms & Replacement Guide
Category: Engine | Failure Severity: Medium | Replacement Cost in India: ₹8,000–₹25,000
What is the Mass Airflow Sensor?
The MAF sensor measures the amount of air entering the engine.
How the Mass Airflow Sensor Works
It sends airflow data to ECU for precise fuel injection.
Why the Mass Airflow Sensor is Important
Ensures optimal air-fuel ratio for performance.
Common Problems with the Mass Airflow Sensor
- Dirt buildup
- Sensor failure
Warning Symptoms of a Failing Mass Airflow Sensor
- Poor mileage
- Rough idle
- Engine hesitation
Common Causes of Mass Airflow Sensor Failure
- Dust contamination
- Electrical faults
Impact on Car Performance
Incorrect readings reduce efficiency and power.
DIY Fix Guide — Step by Step
- Clean sensor
- Check connections
- Scan ECU
- Replace if faulty
- Use clean air filter
Maintenance Tips
- Replace air filter regularly
Mass Airflow Sensor Replacement Cost in India
Expect to pay between ₹8,000 and ₹25,000 for genuine parts plus labour at an authorised BMW workshop. Local garages and aftermarket parts can be 20–40% cheaper but may compromise warranty.
Where to Buy Mass Airflow Sensor Online
Search trusted Indian car-parts retailers like Boodmo, Amazon India and Flipkart for genuine and OEM-grade Mass Airflow Sensor listings.
When to Replace the Mass Airflow Sensor
When cleaning doesn’t fix issues.