Engine knocking sound under acceleration in 3 Series Long Wheelbase

Some users notice a knocking or pinging sound when accelerating hard.

Issue Details

Severity: high
Impact: Can damage engine if ignored.
Estimated Repair Cost: ₹5,000 – ₹70,000
Affected Years: 2019-2024
Frequency: Occasional

Symptoms

Knocking sound
Power loss

Causes

Low-quality fuel
Carbon buildup

Solutions

Use premium fuel
Engine cleaning

Prevention Tips

Avoid low-grade fuel