2012 BMW 335is
2012 BMW 335is
Overview
The 2012 BMW 335is, a performance-oriented variant of the E92 3 Series coupe, is generally regarded as a robust vehicle, particularly given its potent twin-turbocharged engine. It was produced for a limited run, often appealing to enthusiasts seeking a blend of luxury, performance, and a more engaging driving experience compared to standard models. While it shares many components with the regular 335i, specific tuning and features can influence its long-term reliability. This analysis focuses on common reported issues beyond standard maintenance, aiming to provide a clear picture of its technical dependability.
Engine
3.0L Twin-Turbocharged Inline-6 (N54)
Fuel Injector Failure
- Symptoms: Rough idling, misfires, engine stalling, check engine light.
- Solution: Replacement of faulty fuel injectors.
- Cost: $800 - $1500
Water Pump and Thermostat Failure
- Symptoms: Overheating, coolant leaks, check engine light indicating low coolant or temperature issues.
- Solution: Replacement of the electric water pump and thermostat assembly.
- Cost: $700 - $1200
Turbocharger Wastegate Rattle
- Symptoms: Rattling noise from the engine bay, particularly on cold start or deceleration.
- Solution: Replacement of wastegate actuators or turbochargers.
- Cost: $1000 - $2500
Transmission
7-Speed M-DCT Dual-Clutch Automatic
Mechatronics Unit Failure
- Symptoms: Harsh shifting, transmission warning lights, inability to select gears.
- Solution: Repair or replacement of the mechatronics unit.
- Cost: $2000 - $4000
Clutch Pack Wear
- Symptoms: Slipping gears, rough engagement, delayed shifts.
- Solution: Replacement of clutch packs.
- Cost: $1500 - $3000
6-Speed Manual
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
iDrive System Glitches
- Symptoms: Screen freezing, unresponsiveness, audio issues.
- Solution: Software updates or replacement of the iDrive control unit.
- Cost: $500 - $1500
Headlight Control Module Failure
- Symptoms: Malfunctioning headlights (e.g., not turning on, flickering), dashboard warning lights.
- Solution: Replacement of the headlight control module.
- Cost: $300 - $600
Exterior
Body Panels and Trim
No widespread issues reported.
- Symptoms: N/A
- Solution: N/A
- Cost: Varies
Interior
Cabin Components
No widespread issues reported.
- Symptoms: N/A
- Solution: N/A
- Cost: Varies
Summary Verdict
The 2012 BMW 335is is a capable performance coupe with a generally solid mechanical foundation. The potent N54 engine, while delivering exhilarating performance, is prone to specific issues like fuel injector failures, water pump/thermostat problems, and wastegate rattle, which are relatively common for this engine variant. The M-DCT transmission can also present costly issues with its mechatronics unit and clutch packs. However, the manual transmission and other systems like suspension, exterior, and interior components tend to be reliable, with electrical gremlins like iDrive glitches being the most frequent non-mechanical concern. Regular maintenance and addressing these known issues proactively are key to maintaining the 335is’s performance and longevity.