HVREX family
HVREX_a004_MissingPartNumber
Vehicle configuration mismatch
What does the HVREX_a004_MissingPartNumber alert mean?
Incorrect, missing, or unsupported board part number programmed
What you'll see in your Tesla
- Vehicle configuration mismatch
- Service is required
What triggers it
ECU detects an unexpected board part number
When it clears
ECU detects the expected board part number
Potential impact
ECU is unable to initialize parameters related to printed circuit board assembly (PCBA) configuration
Affected models
Cybertruck
Track your Tesla's alerts automatically
Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.