Oxygen Sensor for BMW 7 Series — Price, Symptoms & Replacement Guide
Category: Engine | Failure Severity: Medium | Replacement Cost in India: ₹5,000–₹25,000
What is the Oxygen Sensor?
The oxygen sensor measures oxygen levels in exhaust gases to optimize fuel mixture.
How the Oxygen Sensor Works
It sends feedback to ECU for adjusting air-fuel ratio.
Why the Oxygen Sensor is Important
Ensures efficient combustion and emission control.
Common Problems with the Oxygen Sensor
- Sensor failure
- Contamination
Warning Symptoms of a Failing Oxygen Sensor
- Check engine light
- Poor mileage
- Rough idle
Common Causes of Oxygen Sensor Failure
- Carbon deposits
- Aging
Impact on Car Performance
Faulty sensor increases fuel consumption and emissions.
DIY Fix Guide — Step by Step
- Scan ECU codes
- Inspect sensor wiring
Maintenance Tips
- Replace periodically
Oxygen Sensor Replacement Cost in India
Expect to pay between ₹5,000 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 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
Every 60,000–100,000 km or when faulty.