2015 BMW 428i Gran Coupe

The 2015 BMW 428i Gran Coupe is a four-door coupe that blends sporty styling with practicality. The most common engine option is the 2.0L turbocharged four-cylinder, producing 240 horsepower and 255 lb-ft of torque. Other engine options include the 435i’s 3.0L turbocharged inline-six, boasting 300 horsepower and 300 lb-ft of torque. Both engines are typically paired with an 8-speed automatic transmission, though a 6-speed manual was offered on some models. Owners often praise the 428i Gran Coupe for its sleek design, agile handling, and comfortable ride. Common complaints center around the cost of maintenance, occasional electrical glitches, and the relatively small rear seats.

Engine

2.0L Turbocharged Inline-4 (N20)

• Oil Leaks from Valve Cover Gasket and Oil Filter Housing Gasket
  • Description/Symptoms: Oil leaks are a common issue as the gaskets age. Symptoms include oil spots on the ground, burning oil smell, and low oil levels.
  • Solution: Replacing the valve cover gasket and/or oil filter housing gasket.
  • Estimated Cost to Fix: $200 - $600+ depending on location and if both gaskets need replacement.
  • Recalls: None Found
• Timing Chain Issues
  • Description/Symptoms: The N20 engine is known for timing chain issues. Symptoms include a rattling noise upon startup, especially when cold, and potential engine misfires. This can lead to serious engine damage if not addressed.
  • Solution: Replacing the timing chain, tensioner, and guides.
  • Estimated Cost to Fix: $1,500 - $3,000+
  • Recalls: None Found

3.0L Turbocharged Inline-6 (N55)

• Oil Leaks from Valve Cover Gasket and Oil Filter Housing Gasket
  • Description/Symptoms: Similar to the N20, the N55 can develop oil leaks from the valve cover and oil filter housing gaskets as they age and harden. Symptoms include visible oil leaks, burning oil smell, and low oil levels.
  • Solution: Replacing the valve cover gasket and/or oil filter housing gasket.
  • Estimated Cost to Fix: $200 - $600+ depending on location and if both gaskets need replacement.
  • Recalls: None Found
• VANOS Solenoid Issues
  • Description/Symptoms: Malfunctioning VANOS (Variable Valve Timing) solenoids can lead to rough idling, reduced power, and check engine lights.
  • Solution: Replacing the VANOS solenoids.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Transmission

8-Speed Automatic (ZF 8HP)

• Harsh Shifting/Hesitation
  • Description/Symptoms: Some owners have reported harsh shifting, particularly between lower gears, or hesitation when accelerating. This can be related to the transmission fluid condition or internal wear.
  • Solution: Performing a transmission fluid flush and potentially replacing the mechatronic unit or valve body if the issue persists.
  • Estimated Cost to Fix: $300 for a fluid flush, $1,500 - $4,000+ for mechatronic unit/valve body replacement.
  • Recalls: None Found

Suspension

• Cracked or Worn Suspension Components
  • Description/Symptoms: Over time, bushings, control arms, and struts can wear out, leading to clunking noises, uneven tire wear, and degraded handling.
  • Solution: Replacing worn suspension components.
  • Estimated Cost to Fix: $300 - $1,500+ depending on the component and labor.
  • Recalls: None Found

Electrical

• Faulty Comfort Access System
  • Description/Symptoms: The Comfort Access system (keyless entry/start) can sometimes malfunction, causing the doors to not unlock or the car to not start.
  • Solution: Diagnosis and repair or replacement of the door handle sensors or related control modules.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found
• Malfunctioning iDrive Screen/Controller
  • Description/Symptoms: The iDrive system screen may freeze, flicker, or become unresponsive. The iDrive controller knob may also malfunction.
  • Solution: Software updates, or replacement of the iDrive screen or controller.
  • Estimated Cost to Fix: $200 - $1,500+
  • Recalls: None Found

Exterior

• Failing Door Handle Sensors
  • Description/Symptoms: Comfort access malfunctions and doors can become hard to open
  • Solution: Replacing the sensor.
  • Estimated Cost to Fix: $200-$500+
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof may get stuck, fail to open/close properly, or develop excessive wind noise.
  • Solution: Cleaning and lubricating the sunroof tracks, or replacing the sunroof motor or components.
  • Estimated Cost to Fix: $100 - $1,000+
  • Recalls: None Found

Summary

The 2015 BMW 428i Gran Coupe presents a mixed bag of potential issues. Engine oil leaks and timing chain problems with the N20 are significant concerns, potentially leading to costly repairs. The N55 engine has fewer major issues but still requires attention to common oil leaks and VANOS solenoids. Transmission problems, electrical glitches, and suspension wear are also common. Overall, while the 428i Gran Coupe offers a desirable blend of style and performance, potential buyers should be aware of these potential issues and factor in maintenance costs when making their decision. The severity of the issues ranges from minor annoyances to major mechanical failures, with repair costs varying accordingly. Pre-purchase inspections and thorough maintenance records are highly recommended.