P0304high severityPowertrain
Cylinder 4 Misfire Detected
on 2000 BMW M5 4.9L V8 S62 · RWD
What this code means
Misfire detected in cylinder 4.
Symptoms
- Check Engine Light
- Rough idle
- Vibration
- Loss of power
Common causes
- Worn spark plug #4
- Faulty ignition coil #4
- Faulty injector #4
- Low compression cyl 4
Diagnostic steps
- Swap coil #4
- Inspect spark plug #4
- Test injector #4
- Check compression
Repair notes
Swap coil to diagnose.
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Bluetooth code reader (~$25)
Veepeak OBDCheck BLE →
Pairs with your phone — reads and clears codes, live data.
Serious DIY (~$100)
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
Shop-grade tablet (~$300+)
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
As an Amazon Associate, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Other Powertrain codes on this vehicle
29CC
Misfire Cylinder 1
29CD
Misfire Cylinder 2
29CE
Misfire Cylinder 3
29CF
Misfire Cylinder 4
29D0
Misfire Cylinder 5
29D1
Misfire Cylinder 6
29D2
Misfire Cylinder 7
29E0
Lambda Additive/Idle Adaptation Limit, Bank 1
29E1
Lambda Additive/Idle Adaptation Limit, Bank 2
29E2
Lambda Multiplicative Part-Load Adaptation Limit, Bank 1