Cooling System Leaks/Failure

The N55 engine's cooling system, particularly the water pump and thermostat housing, is prone to leaks and premature failure. This can lead to overheating and significant engine damage if not addressed promptly. Estimated repair cost: $800 - $1800.

Ignition System Failures

Coil-on-plug ignition systems, including spark plugs and ignition coils, can fail prematurely. This leads to misfires and reduced engine performance. Estimated repair cost: $400 - $800.

While generally robust, the turbocharger on the N55 engine can develop issues related to wastegate control or bearing wear, especially with neglected maintenance. Estimated repair cost: $1500 - $3000.

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2013 BMW 740i Maintenance guide

Name: Maintenance dataset for 2013 BMW 740i
Creator: Carfocal

v1.0Updated Jul 4, 2026Ethan Miller4 Sources Analyzed

MAINTENANCE SUMMARY

The 2013 BMW 740i, with an 'Average' reliability verdict and 187 TSBs, demands diligent maintenance. Key concerns include potential cooling system failures and ignition system issues, necessitating proactive inspections.

View Critical Issue: Turbocharger Issues

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Reliability Score

Est. Annual Maintenance Cost

$300 - $700

TSBs & Recalls

187 TSBs | 1 Recalls

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Key Takeaways

Proactive cooling system maintenance is paramount.
Regular ignition system checks and replacements prevent performance issues.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance