Oxygen Sensor for BMW M4 CS — Price, Symptoms & Replacement Guide
Category: Engine | Failure Severity: Medium | Replacement Cost in India: ₹7,000–₹20,000
What is the Oxygen Sensor?
The oxygen sensor measures oxygen levels in exhaust gases.
How the Oxygen Sensor Works
It helps ECU adjust fuel mixture for optimal combustion.
Why the Oxygen Sensor is Important
Ensures emission control and fuel efficiency.
Common Problems with the Oxygen Sensor
- Sensor failure
- Contamination
Warning Symptoms of a Failing Oxygen Sensor
- Poor mileage
- Check engine light
- Emission issues
Common Causes of Oxygen Sensor Failure
- Carbon buildup
- Fuel contamination
Impact on Car Performance
Can reduce efficiency and increase emissions.
DIY Fix Guide — Step by Step
- Scan error codes
- Inspect sensor
- Clean if possible
- Replace faulty unit
- Use quality fuel
Maintenance Tips
- Regular inspection
- Avoid poor fuel
Oxygen Sensor Replacement Cost in India
Expect to pay between ₹7,000 and ₹20,000 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 Oxygen Sensor Online
Search trusted Indian car-parts retailers like Boodmo, Amazon India and Flipkart for genuine and OEM-grade Oxygen Sensor listings.
When to Replace the Oxygen Sensor
Around 60,000–80,000 km.