2009 BMW 335d
2009 BMW 335d
Overview
The 2009 BMW 335d, a potent diesel variant of the popular 3 Series, offers a compelling blend of performance and fuel efficiency. Powered by a robust 3.0-liter twin-turbocharged inline-six diesel engine, it delivers impressive torque and acceleration. While generally well-regarded for its driving dynamics and solid build quality, like any vehicle, it has specific areas that have seen more attention from owners regarding reliability. This analysis focuses on documented technical issues beyond routine maintenance, providing insights into potential concerns for prospective buyers or current owners.
Engine
3.0L Twin-Turbocharged Diesel (M57D30TÜ2)
Diesel Particulate Filter (DPF) Issues
- Symptoms: Reduced engine power, increased fuel consumption, check engine light illumination, potential engine shutdown.
- Solution: DPF regeneration (forced or passive), DPF cleaning, or replacement.
- Cost: $500 - $2500
Glow Plug System Failure
- Symptoms: Hard starting, especially in cold weather, rough idle, check engine light.
- Solution: Replacement of faulty glow plugs and/or glow plug module.
- Cost: $300 - $800
EGR Cooler Leaks
- Symptoms: Coolant loss, white smoke from exhaust, overheating, potential for coolant entering the exhaust system.
- Solution: Replacement of the EGR cooler.
- Cost: $600 - $1200
Turbocharger Issues
- Symptoms: Loss of power, whistling noises, black smoke from exhaust, oil leaks around turbo.
- Solution: Repair or replacement of turbocharger(s).
- Cost: $1500 - $3500
Transmission
6-Speed Automatic (ZF 6HP26)
No widespread issues reported.
- Symptoms: N/A
- Solution: N/A
- Cost: Varies
Suspension
Standard Chassis
No widespread issues reported.
- Symptoms: N/A
- Solution: N/A
- Cost: Varies
Electrical
General Electrical System
Water Pump Failure (Electric)
- Symptoms: Overheating, coolant leaks, check engine light.
- Solution: Replacement of the electric water pump.
- Cost: $500 - $1000
Sensor Failures (Various)
- Symptoms: Illuminated warning lights (check engine, ABS, etc.), erratic performance, drivability issues.
- Solution: Diagnosis and replacement of faulty sensors (e.g., ABS sensors, crankshaft position sensor).
- Cost: $200 - $600 per sensor
Exterior
Body and Trim
No widespread issues reported.
- Symptoms: N/A
- Solution: N/A
- Cost: Varies
Interior
Cabin Systems
No widespread issues reported.
- Symptoms: N/A
- Solution: N/A
- Cost: Varies
Summary Verdict
The 2009 BMW 335d is a capable and enjoyable vehicle, but its diesel powertrain, particularly the M57 engine, presents a few key areas that warrant attention. The Diesel Particulate Filter (DPF) system is a common point of concern, requiring proper maintenance or potential costly repairs. Issues with the glow plug system, EGR cooler, and turbochargers are also documented. While the automatic transmission and other systems are generally reliable, potential buyers should be aware of these diesel-specific potential problems and factor in potential maintenance costs. Regular servicing and adherence to BMW’s recommendations are crucial for mitigating these issues.