2013 — 2019
3.0L Inline-6 (N57D30)
Diesel
Check for cold start rough idling | Note: Carbon buildup in the intake manifold and EGR system is common; heavy vibration can indicate injector failure.
Listen for turbo whine under load | Note: The N57 sequential turbo setup is complex; excessive whistling or lack of low-end torque suggests actuator or turbine wear.
Verify DPF regeneration cycle | Note: Frequent short city trips in NZ traffic kill the DPF. Check for 'Drive moderately' errors or soot buildup on the exhaust tips.
Test suspension bushings and joints | Note: The 335d is heavy; worn control arm bushings and sway bar links will cause clunking on uneven Kiwi backroads.
Ensure all manufacturer recall actions, specifically regarding the EGR cooler, have been completed.
Replace transmission fluid (ZF 8HP) and filter pan, even if 'sealed for life' according to BMW.
Plan for intake manifold walnut blasting and potential replacement of engine thermostat and water pump.
Perform oil and filter changes every 10,000km (ignore the 25,000km extended interval).
Monitor EGR cooler integrity as these are prone to leaking and fire risks.
Inspect the harmonic balancer/crank pulley for signs of rubber degradation.
Change fuel filter every 40,000km to protect the high-pressure fuel pump.
Flush brake fluid every 24 months to prevent ABS/DSC module corrosion.
Estimated repair costs if issues arise
Preventative maintenance to maintain throttle response and efficiency.
Essential to prevent premature torque converter wear.
Worst-case scenario if maintenance is neglected.
Common issue for vehicles used primarily for commuting.
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Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer