Crankshaft for BMW 3 Series — Price, Symptoms & Replacement Guide
Category: Engine | Failure Severity: High | Replacement Cost in India: ₹50,000–₹1,50,000
What is the Crankshaft?
The crankshaft converts the reciprocating motion of pistons into rotational motion to drive the wheels.
How the Crankshaft Works
As pistons move up and down, the crankshaft rotates, transferring energy to the transmission system.
Why the Crankshaft is Important
Essential for converting engine power into usable motion.
Common Problems with the Crankshaft
- Wear and tear
- Bearing failure
- Cracks
Warning Symptoms of a Failing Crankshaft
- Engine vibration
- Knocking sound
- Low oil pressure
Common Causes of Crankshaft Failure
- Poor lubrication
- High mileage
- Oil contamination
Impact on Car Performance
Failure can completely stop engine operation.
DIY Fix Guide — Step by Step
- Check engine oil level
- Listen for knocking noise
- Avoid high RPM driving if symptoms appear
Maintenance Tips
- Regular oil change
- Use high-quality engine oil
Crankshaft Replacement Cost in India
Expect to pay between ₹50,000 and ₹1,50,000 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 Crankshaft Online
Search trusted Indian car-parts retailers like Boodmo, Amazon India and Flipkart for genuine and OEM-grade Crankshaft listings.
When to Replace the Crankshaft
Replace when severely worn, cracked, or causing persistent knocking.