BMW Error Code P1347: How to Fix It
Medium 2-4 hours High Severity
Verified June 2026
- Error Code
- P1347
- Brand
- BMW
- Product Type
- automotive
- Severity
- High
- DIY Difficulty
- Medium
- Estimated Fix Time
- 2-4 hours
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Tools You'll Need
- OBD2 scanner
- Socket wrench set
- Spark plug socket
- Multimeter
- Compression tester
- Noid light or injector tester
- Torque wrench
How to Fix Error Code P1347
-
Turn off engine immediately
Do not continue driving - severe misfires can cause catalytic converter failure -
Scan for additional codes
Turn off engine and allow it to cool before working under the hood -
Inspect cylinder 6 ignition coil
-
Check spark plug condition
Allow engine to cool completely before removing spark plugs to avoid burns -
Test ignition coil resistance
-
Perform compression test
Remove all spark plugs and disable fuel injection before compression testing -
Check fuel injector operation
-
Replace faulty components
Use proper torque specifications when installing spark plugs to avoid thread damage -
Clear codes and test drive
Drive gently during initial testing - stop immediately if misfire returns
Parts You May Need
Ignition coil
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Spark plug
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Fuel injector
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Engine oil
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Ignition coil
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Spark plug
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Fuel injector
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Engine oil
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Ignition coil
Check Price on Amazon
Spark plug
Check Price on Amazon
Fuel injector
Check Price on Amazon
Engine oil
Check Price on Amazon
Ignition coil
Check Price on Amazon
Spark plug
Check Price on Amazon
Fuel injector
Check Price on Amazon
Engine oil
Check Price on Amazon
Ignition coil
Check Price on Amazon
Spark plug
Check Price on Amazon
Fuel injector
Check Price on Amazon
Engine oil
Check Price on Amazon
Ignition coil
Check Price on Amazon
Spark plug
Check Price on Amazon
Fuel injector
Check Price on Amazon
Engine oil
Check Price on Amazon
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When to Call a Professional
Call a professional mechanic if compression testing reveals internal engine problems, if multiple cylinders are misfiring, if you're uncomfortable working with ignition systems, or if the problem persists after replacing basic ignition components. Engine internal damage requires specialized tools and expertise.Frequently Asked Questions
Can I drive with BMW error code P1347?
No, you should not drive with P1347. This code indicates a severe misfire that can damage your catalytic converter, which is extremely expensive to replace. Stop driving immediately when this code appears.
What causes BMW P1347 cylinder 6 misfire?
Common causes include faulty ignition coils, worn spark plugs, clogged fuel injectors, low compression due to worn engine components, vacuum leaks, or wiring issues in the ignition system.
How much does it cost to fix BMW P1347?
Repair costs vary widely depending on the cause. Simple fixes like spark plugs or ignition coils cost $100-400. More serious issues like fuel injectors or internal engine problems can cost $500-3000 or more.
Will P1347 damage my BMW catalytic converter?
Yes, P1347 specifically indicates a misfire severe enough to damage the catalytic converter. Unburned fuel from the misfire can overheat and destroy the catalyst, leading to expensive repairs.
How do I know if my BMW ignition coil is bad?
Signs include rough idle, loss of power, poor fuel economy, and fault codes. You can test coils with a multimeter or swap coils between cylinders to see if the misfire moves to a different cylinder.