Crankshaft Sensor Failure

A recall (18V465000) addressed incorrect crankshaft sensor firmware leading to potential engine stalls. While the recall remedy should fix this, a faulty sensor can still cause issues. Estimated repair cost: $300 - $600.

Over time, rubber vacuum hoses and seals can degrade, leading to leaks that affect engine performance and emissions. Estimated repair cost: $400 - $800.

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2018 BMW 340i Maintenance guide

Name: Maintenance dataset for 2018 BMW 340i
Creator: Carfocal

v1.0Updated Jul 4, 2026Daniel Wilson4 Sources Analyzed1 Critical Recalls

MAINTENANCE SUMMARY

The 2018 BMW 340i, with a 'Good' reliability verdict, presents a manageable maintenance profile. A significant recall for the crankshaft sensor warrants verification of repair.

View Critical Issue: Oil Leaks (Valve Cover Gasket)

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Reliability Score

Est. Annual Maintenance Cost

$500 - $800

TSBs & Recalls

22 TSBs | 1 Recalls

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Key Takeaways

Verify the crankshaft sensor recall has been completed.
Monitor for potential vacuum leaks and oil leaks from the valve cover gasket.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance