U0304moderate severityNetwork
Software Incompatibility with Cruise Control Module
on 2000 BMW 525i 2.5L I6 M54 · RWD
What this code means
Software incompatibility with the cruise control system causing data errors.
Symptoms
- Cruise control erratic
- Adaptive cruise not engaging
- Speed set point drifting
- Cruise control disabling unexpectedly
Common causes
- Cruise module software outdated
- Software conflict after update
- Module version mismatch
Diagnostic steps
- Check cruise control module software version
- Update module software
- Check for known software conflicts
- Verify module compatibility
Repair notes
Update cruise control module software to version compatible with other vehicle modules.
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Other Network codes on this vehicle
CC-ID-181
System Check Failed
CC-ID-207
Central Electronics Failure, Stop Vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High