Cracked rear wheel supports and tire separations under the rim have been reported at low mileages, potentially due to design flaws exacerbated by run-flat tires. This can lead to dangerous blowouts and loss of control. Estimated repair cost: $500 - $1,500.

Electrical System Issues

Complaints indicate potential problems within the electrical system, sometimes bundled with other issues like engine lights or door closure problems. This suggests possible wiring harness or control module faults. Estimated repair cost: $300 - $1,200.

Water can enter the cabin through failed body seals, such as the rear brake light seal, leading to mold growth and potential corrosion of electrical components. Estimated repair cost: $100 - $400.

Issues with the service brakes have been reported, sometimes in conjunction with other system faults. This warrants careful inspection of the entire braking system. Estimated repair cost: $400 - $1,000.

CARFOCALvehicle research

2015 BMW 640i Maintenance guide

Name: Maintenance dataset for 2015 BMW 640i
Creator: Carfocal

v1.0Updated May 30, 2026Ethan Miller4 Sources Analyzed1 Critical Recalls

MAINTENANCE SUMMARY

The 2015 BMW 640i requires diligent maintenance, with a significant focus on its wheel assemblies and electrical system. Early-life wheel failures, including tire separations and cracked wheels, are a notable concern, necessitating thorough inspections.

View Critical Issue: Wheel Failures

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Reliability Score

Est. Annual Maintenance Cost

Not available

TSBs & Recalls

159 TSBs | 1 Recalls

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Key Takeaways

Prioritize the driver's frontal airbag inflator recall (24V527000) due to its critical safety implications.
Regularly inspect wheel assemblies for cracks, separations, or unusual wear, especially with run-flat tires.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance