2011 BMW 135i

Introduction:

The 2011 BMW 135i is a high-performance compact car powered by a 3.0L twin-turbocharged straight-six engine producing 300 horsepower and 295 lb-ft of torque. It comes standard with a 6-speed manual transmission, while a 6-speed automatic transmission is available as an option. The 135i is praised for its thrilling performance, sharp handling, and luxurious interior. However, it has also been subjected to various issues reported by owners.

Engine

N54 3.0L Twin-Turbocharged Straight-Six

• High-Pressure Fuel Pump Failure: Symptoms: Difficulty starting, reduced engine power, rough idling Solution: Replace fuel pump Cost to Fix: $800 - $1,500+

Transmission

6-Speed Manual Transmission

• Bent Shift Fork: Symptoms: Difficulty shifting gears, grinding noises when shifting Solution: Replace shift fork Cost to Fix: $600 - $1,000+

6-Speed Automatic Transmission

• Mechatronic Unit Failure: Symptoms: Jerking or slipping during gear changes, transmission warning light Solution: Replace mechatronic unit Cost to Fix: $2,500 - $3,500+

• Valve Body Failure: Symptoms: Erratic shifting, difficulty shifting into certain gears Solution: Replace valve body Cost to Fix: $1,500 - $2,500+

Suspension

• Rear Subframe Bushing Failure: Symptoms: Clunking or knocking noises from the rear, excessive tire wear Solution: Replace subframe bushings Cost to Fix: $500 - $1,000+

• Front Control Arm Bushings Failure: Symptoms: Steering instability, excessive tire wear Solution: Replace control arm bushings Cost to Fix: $300 - $600+

Electrical

• Battery Discharge: Symptoms: Battery drains quickly, difficulty starting Solution: Check battery and electrical system for parasitic draw Cost to Fix: $100 - $300+

• Alternator Failure: Symptoms: Dimming headlights, reduced electrical power, warning light Solution: Replace alternator Cost to Fix: $600 - $1,200+

Exterior

• Sunroof Drain Clogs: Symptoms: Water leaks into the cabin Solution: Clean or replace sunroof drains Cost to Fix: $200 - $500+

• Headlight Condensation: Symptoms: Moisture inside the headlights Solution: Replace headlight lenses Cost to Fix: $500 - $1,000+

Interior

• Navigation System Shutdown: Symptoms: GPS not working, black screen Solution: Update software or replace navigation unit Cost to Fix: $100 - $500+

• Climate Control Malfunction: Symptoms: Blower motor not working, temperature not regulating Solution: Check electrical connections or replace climate control module Cost to Fix: $500 - $1,200+

Summary:

The 2011 BMW 135i has a number of reported issues that can be costly to repair. While the performance and luxury of the vehicle are praised, the electrical, transmission, and suspension systems have experienced significant problems. Potential buyers should be aware of these issues and factor in the potential expenses before purchasing.