Timing chain noise on cold start in 3 Series

Rattling sound heard during cold start.

Issue Details

Severity: high
Impact: Engine failure risk
Estimated Repair Cost: ₹20,000 – ₹80,000
Affected Years: 2014-2020
Frequency: Occasional

Symptoms

Rattling noise

Causes

Chain wear

Solutions

Replace timing chain

Prevention Tips

Timely oil change