Post-Catalytic Oxygen Sensor for Audi SQ8 — Price, Symptoms & Replacement Guide
Category: Engine | Failure Severity: Medium | Replacement Cost in India: ₹10,000–₹30,000
What is the Post-Catalytic Oxygen Sensor?
Monitors exhaust gases after catalytic converter.
How the Post-Catalytic Oxygen Sensor Works
Ensures catalytic converter is functioning correctly.
Why the Post-Catalytic Oxygen Sensor is Important
Helps maintain emission standards.
Common Problems with the Post-Catalytic Oxygen Sensor
- Sensor failure
Warning Symptoms of a Failing Post-Catalytic Oxygen Sensor
- Check engine light
- Poor mileage
Common Causes of Post-Catalytic Oxygen Sensor Failure
- Wear
- Contamination
Impact on Car Performance
Incorrect readings affect emission control.
DIY Fix Guide — Step by Step
- Scan ECU
- Replace sensor
Maintenance Tips
- Use quality fuel
Post-Catalytic Oxygen Sensor Replacement Cost in India
Expect to pay between ₹10,000 and ₹30,000 for genuine parts plus labour at an authorised Audi workshop. Local garages and aftermarket parts can be 20–40% cheaper but may compromise warranty.
Where to Buy Post-Catalytic Oxygen Sensor Online
Search trusted Indian car-parts retailers like Boodmo, Amazon India and Flipkart for genuine and OEM-grade Post-Catalytic Oxygen Sensor listings.
When to Replace the Post-Catalytic Oxygen Sensor
Replace when faulty or error code appears.