how to fix B0073 code in Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle’s 12V battery to ensure safety while working on electrical components.

2. Inspect Wiring and Connectors

• Remove the seat from the vehicle (typically involves removing bolts with a socket set).
• Carefully disconnect the wiring harness from the seat occupancy sensor.
• Inspect the wiring for any signs of fraying, cuts, or corrosion.
• Clean any corrosion from connectors using electrical contact cleaner.

3. Replace Seat Occupancy Sensor (if necessary)

• If the sensor is found to be faulty during testing, remove the old sensor by unscrewing it from its mounting.
• Install the new seat occupancy sensor and secure it in place.
• Reconnect the wiring harness ensuring a snug fit.

4. Reinstall Seat

• Position the seat back into its original location and secure it with bolts.
• Ensure that all bolts are torqued to the manufacturer’s specifications (typically around 25-30 Nm, check service manual for exact values).

5. Reconnect Battery and Clear Codes

• Reconnect the vehicle's 12V battery.
• Use the diagnostic tool to clear the B0073 code and any other related codes.
• Perform a system check to ensure the airbag system is functioning correctly.