Service Brakes: Caliper Bolt Looseness

Recalls have addressed loose brake caliper bolts, which can affect braking performance and potentially lead to brake failure. This is a critical safety issue. Estimated repair cost: $100 - $300 (Inspection and tightening; potential caliper replacement).

Vehicle Speed Control: Adaptive Cruise Control Issues

Beyond phantom braking, Adaptive Cruise Control can exhibit erratic behavior, including unintended acceleration or deceleration, or failure to maintain set speed. These issues are often software-related. Estimated repair cost: $0 - $1,500 (Software updates may be free; hardware diagnosis/replacement varies).

Airbags: Side Curtain Airbag Installation

Recalls have identified improperly secured side curtain airbags, posing a significant safety risk in a collision. This requires professional inspection and correction. Estimated repair cost: $0 - $500 (Recall remedy).

CARFOCALvehicle research

2021 Tesla Model 3 Maintenance guide

Name: Maintenance dataset for 2021 Tesla Model 3
Creator: Carfocal

v1.2Updated May 30, 2026Ryan Davis4 Sources Analyzed10 Critical Recalls

MAINTENANCE SUMMARY

The 2021 Tesla Model 3 requires diligent attention to its advanced driver-assistance systems (ADAS) due to frequent complaints about phantom braking. While specific maintenance schedules are minimal for electric powertrains, owners must prioritize addressing ADAS malfunctions and be aware of critical recalls affecting brakes and airbags.

View Critical Issue: Forward Collision Avoidance: Phantom Braking

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Reliability Score

Est. Annual Maintenance Cost

$150 - $300

TSBs & Recalls

2 TSBs | 42 Recalls

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Key Takeaways

Proactive management of ADAS features is crucial due to frequent phantom braking complaints.
Promptly address all safety recalls, particularly those related to braking and airbags.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance