"Is the 3 Serisi 335i reliable, and what should you check?"
When buying a used 2009 BMW 3 Series 335i (E90 / E91 / E92 / E93 / facelift), the most frequently mentioned issue is turbo failure and wastegate rattle. High-pressure fuel pump (HPFP) failure is also commonly reported.
Engine: N54
N54B30 · 335i · Used in this car from 2006-2009
Strengths
Most reliable engine in its series
Very high tuning potential
Watch-outs
Problematic direct injection system
Oil and coolant leaks
Short-lived thermostat and electric water pump
Known engine issues
Injectors and High-Pressure Fuel PumpThe main problem is the direct injection system with piezo injectors. The fuel pump went through several revisions but never became truly reliable, and the injectors not only have low service life but often cause hydraulic lock.
TurbochargersThe Mitsubishi turbos themselves last long and cause no particular issues, but their wastegate valves can wear out and start rattling before 100,000 km. Another weak point is the boost control solenoids.
Timing ChainThe timing chain has decent life and stretches after 200,000 km. However, frequent overheating causes the plastic guides to break and fall into the oil pan. Also, with infrequent oil changes, VANOS filters clog and they start knocking.
Listed from most frequently reported, each with its source.
Turbo failure and wastegate rattle
Often reported
After turbo failures or regeneration, the vehicle may experience low-end torque loss, rough running, and poor response; turbo replacement may be necessary. Additionally, wastegate bushing rattle and premature wear are commonly reported on N54 turbochargers, leading to performance loss, metallic noises, and in severe cases, turbo replacement.
Turbo
High-pressure fuel pump (HPFP) failure
Often reported
The high-pressure fuel pump (HPFP) is one of the most reported issues on this 3.0 N54 engine, causing early failures that result in check engine light, power loss, and limp mode. Replacement is often necessary and costly.
Fuel System
Faulty fuel injectors
Often reported
The N54 engine commonly experiences injector failures, causing misfires, vibrations, check engine light, and power loss.
Fuel System
Warranty extensions and high repair costs
Often reported
BMW has offered warranty extensions for HPFP, injectors, and wastegate in some markets (e.g., USA), but not consistently in Europe, leading to high repair costs for European owners.
Fuel System
BMW 3 Serisi 335i technical specs
BMW 3 Serisi 335i (2009): boot 430 L; fuel use 9,5 l/100 km (urban 14,3 l/100 km · extra-urban 6,7 l/100 km); 0–100 in 5.5 s.
Boot capacity
430 L
Fuel consumption
9,5 l/100 km (urban 14,3 l/100 km · extra-urban 6,7 l/100 km)
What should I look for when buying a BMW 3 Series 335i?+
When buying a 2009 335i, check the service history, perform a test drive, and inspect engine/transmission warnings. Most commonly reported issues: turbo failure and wastegate rattle; high-pressure fuel pump (HPFP) failure; faulty fuel injectors.
What are the common problems of the BMW 3 Series 335i?+
Most frequently reported issues: turbo failure and wastegate rattle; high-pressure fuel pump (HPFP) failure; faulty fuel injectors.
Is the BMW 3 Series 335i reliable?+
Rather than a simple yes or no, it's important to weigh the proven pros and cons together. This page lists 4 verified findings.
How does Carbeak collect data?+
The cards on this page are derived from the Difetti fault database; brand, fuel type, engine, and generation compatibility between the source vehicle and target vehicle are verified. Topics with insufficient evidence are not shown.