Oxygen Sensor (O2 Sensor) — Audi A6

Category: Engine | Severity: medium | Cost: ₹4,000–₹15,000

What is Oxygen Sensor (O2 Sensor)?

Measures oxygen level in exhaust gases.

How Oxygen Sensor (O2 Sensor) Works

Helps ECU adjust fuel mixture for efficiency.

Why is Oxygen Sensor (O2 Sensor) Important?

Critical for emissions and fuel economy.

Common Problems

Symptoms

Causes of Failure

Impact on Car Performance

Increases emissions and fuel consumption.

DIY Fix Guide — Step by Step

Maintenance Tips

Replacement Cost in India

Estimated range: ₹4,000 – ₹15,000

Where to Buy Online

    When to Replace Oxygen Sensor (O2 Sensor)

    Replace when sensor fails or after high mileage.