The **cooling system** on these BMWs is prone to leaks from plastic components like the expansion tank, hoses, and water pump. Failure can lead to overheating and severe engine damage. Estimated repair cost: $500 - $1500.

The **high-pressure fuel pump** can fail, leading to rough running, stalling, and starting issues. This is a critical component for direct-injection engines. Estimated repair cost: $600 - $1200.

Oil Leaks (Valve Cover Gasket)

The **valve cover gasket** can degrade over time, leading to oil leaks onto the exhaust manifold, causing smoke and a burning smell. This can also lead to oil consumption. Estimated repair cost: $400 - $800.

CARFOCALvehicle research

2017 BMW 335i Maintenance guide

Name: Maintenance dataset for 2017 BMW 335i
Creator: Carfocal

v1.0Updated Jul 4, 2026Daniel Wilson4 Sources Analyzed

MAINTENANCE SUMMARY

The 2017 BMW 335i, with an 'Average' reliability verdict and 39 TSBs, demands diligent maintenance. Focus on proactive checks for the cooling system, fuel delivery, and electronic control modules, as indicated by TSB data.

View Critical Issue: Cooling System Leaks

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Reliability Score

Est. Annual Maintenance Cost

$800 - $1,500

TSBs & Recalls

39 TSBs | 0 Recalls

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Key Takeaways

While no recalls or complaints are logged, 39 TSBs indicate potential issues.
Proactive maintenance is key, especially for the cooling system and fuel delivery.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance