The N63/S63 V8 engines are prone to oil leaks from **valve cover gaskets, oil filter housing, and oil pan gaskets**. These can lead to low oil levels and potential engine damage if not addressed promptly. Estimated repair cost: $600 - $1500.

Cooling System Failures

Plastic cooling system components like the **radiator, expansion tank, and hoses** become brittle with age, leading to leaks. **Electric water pumps and thermostats** can also fail, causing overheating. Estimated repair cost: $550 - $1200.

The twin-turbochargers are susceptible to failure due to oil starvation, contamination, or excessive heat, leading to seal or bearing damage. Estimated repair cost: $1500 - $3000+.

Direct injection systems can cause carbon deposits on intake valves, impacting engine performance and efficiency. Estimated repair cost: $300 - $800.

Electrical System Faults

Complex electrical systems can develop issues with age, including battery drain, sensor failures, and module malfunctions. Window regulators and door wiring are also common failure points. Estimated repair cost: $200 - $1000+.

Worn valve stem seals allow oil into the combustion chamber, leading to increased oil consumption and emissions. This is a known issue with the N63/S63 engines. Estimated repair cost: $1600 - $2500+.

CARFOCALvehicle research

2015 BMW 750i Maintenance guide

Name: Maintenance dataset for 2015 BMW 750i
Creator: Carfocal

v1.0Updated May 30, 2026Daniel Wilson4 Sources Analyzed

MAINTENANCE SUMMARY

The 2015 BMW 750i demands diligent maintenance, particularly concerning its V8 twin-turbocharged engine. Owners should anticipate potential issues with oil consumption and leaks from valve cover gaskets, oil filter housings, and oil pan gaskets, which can cause significant engine wear if neglected.

View Critical Issue: Turbocharger Issues

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Reliability Score

Est. Annual Maintenance Cost

$1500 - $3000

TSBs & Recalls

137 TSBs | 1 Recalls

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Key Takeaways

The 2015 BMW 750i has a 'Good' reliability verdict, but a high TSB count (137) signals common issues requiring owner awareness.
Key concerns include oil leaks from various gaskets and seals, and cooling system failures like water pump and thermostat problems.

4 more takeaways unlock below

Critical service intervals

Common failure analysis

Symptoms and prevention guidance

2015 BMW 750i Maintenance guide

v1.0Updated May 30, 2026Daniel Wilson4 Sources Analyzed

MAINTENANCE SUMMARY

View Critical Issue: Turbocharger Issues

Subscribe to Recall Alerts Subscribe to Recall Alerts

Reliability Score

Est. Annual Maintenance Cost

$1500 - $3000

TSBs & Recalls

137 TSBs | 1 Recalls

CarFocal account required

Unlock the Full 2015 BMW 750i Maintenance Guide

Create a free account to reveal the full service schedule, repair costs, and deeper diagnostic data.

Key Takeaways

The 2015 BMW 750i has a 'Good' reliability verdict, but a high TSB count (137) signals common issues requiring owner awareness.
Key concerns include oil leaks from various gaskets and seals, and cooling system failures like water pump and thermostat problems.

4 more takeaways unlock below

Critical service intervals

Common failure analysis

Symptoms and prevention guidance