Critical Safety risk Body-code

B0004

Driver Knee Bolster Deployment Control (Subfault)

Pull over safely and book service immediately

This code is flagged as a safety risk and rated Critical. Avoid driving until a technician has inspected the vehicle.

Causes vary by vehicle. A technician will run targeted diagnostics.

Labor estimate

2h typical

Range: 1h – 4h

Parts cost

$0 – $500

Range varies by year/make/model

Information shown is reference-grade and may vary by vehicle. Always have a qualified technician confirm the cause before any repair.