Hard Brake Pedal – Potential Brake Booster or Vacuum Issue
A consistently hard brake pedal in a Tesla Model 3 indicates a loss of power brake assist. This is often due to a failed brake booster, vacuum pump, or related electrical/hydraulic component. Immediate inspection is required as braking performance is compromised.
Diagnosis Details
Possible Causes
Failed brake booster (vacuum or hydraulic) – the booster is not providing assist, making the pedal hard.
Malfunctioning vacuum pump or vacuum leak – Tesla uses an electric vacuum pump; if it fails or there's a leak, assist is lost.
Faulty brake booster vacuum sensor or control module – incorrect signals can disable assist.
Related OBD-II Codes
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What You Should Do
Do not drive the vehicle.
Have it towed to a qualified Tesla service center.
They will inspect the brake booster, vacuum pump, hoses, and related sensors.
A diagnostic scan is necessary to check for fault codes.
Related Repairs
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.