2016 BMW 428i

The 2016 BMW 428i is a popular luxury coupe, grand coupe (4-door), and convertible that balances sporty handling with everyday comfort. Powered by a 2.0-liter turbocharged four-cylinder engine, it delivers 240 horsepower and 258 lb-ft of torque. The 428i was also available with a 3.0-liter turbocharged inline-six engine in the 435i variant, producing 300 horsepower and 300 lb-ft of torque. Both engines could be paired with either a 6-speed manual or an 8-speed automatic transmission. Owners often praise the 428i for its stylish design, engaging driving experience, and relatively good fuel economy. Criticisms often include the cramped rear seats (especially in the coupe), the high cost of maintenance, and occasional electronic gremlins.

Engine

2.0L Turbocharged Inline-4 (N20/N26)

• Timing Chain Failure
  • Description/Symptoms: Excessive rattling noise upon cold start, especially from the rear of the engine. Can lead to engine damage if left unaddressed. This issue is more prevalent in earlier N20 engines but can still occur in the 2016 model year.
  • Solution: Replacement of the timing chain, guides, and tensioner. Consider replacing the oil pump chain as well.
  • Estimated Cost to Fix: $1,500 - $3,000+
  • Recalls: None Found
• Oil Leaks (Valve Cover Gasket, Oil Filter Housing Gasket)
  • Description/Symptoms: Visible oil leaks on the engine, burning oil smell, low oil level warnings.
  • Solution: Replacement of the leaking gasket.
  • Estimated Cost to Fix: Valve Cover Gasket: $300 - $600. Oil Filter Housing Gasket: $400 - $800.
  • Recalls: None Found

Transmission

8-Speed Automatic (ZF 8HP)

• Mechatronic Unit Failure
  • Description/Symptoms: Harsh or delayed shifting, transmission slipping, warning lights on the dashboard.
  • Solution: Replacement of the mechatronic unit or valve body. Some shops may attempt repair, but replacement is often recommended.
  • Estimated Cost to Fix: $2,000 - $4,000+
  • Recalls: None Found
• Transmission Oil Pan Leak
  • Description/Symptoms: Oil spots underneath the car. Can lead to transmission failure if not addressed. The oil pan is plastic and houses the filter, so the whole pan needs replacing.
  • Solution: Replacement of the transmission oil pan.
  • Estimated Cost to Fix: $500 - $1000
  • Recalls: None Found

Suspension

• Cracked/Broken Coil Springs
  • Description/Symptoms: Clunking or rattling noises from the suspension, uneven ride height, poor handling.
  • Solution: Replacement of the affected coil spring. Recommend replacing in pairs (both front or both rear).
  • Estimated Cost to Fix: $300 - $800+ per pair
  • Recalls: None Found
• Control Arm Bushing Failure
  • Description/Symptoms: Vibrations at highway speeds, clunking noises when going over bumps, vague steering feel.
  • Solution: Replacement of the worn control arm bushings or the entire control arm assembly.
  • Estimated Cost to Fix: Bushings: $200 - $500 per arm. Control Arm Assembly: $400 - $1000 per arm.
  • Recalls: None Found

Electrical

• iDrive System Malfunctions
  • Description/Symptoms: Freezing, Crashing, Failure to boot.
  • Solution: Often requires software updates or replacement of the iDrive module.
  • Estimated Cost to Fix: $200 - $1500+ depending on the problem
  • Recalls: None Found
• Door Lock Actuator Failure
  • Description/Symptoms: Doors not locking/unlocking properly, can be intermittent.
  • Solution: Replacement of the affected door lock actuator.
  • Estimated Cost to Fix: $200 - $500+
  • Recalls: None Found

Exterior

• Door Handle Issues
  • Description/Symptoms: Comfort Access Handles (if equipped) failing to lock/unlock the car.
  • Solution: Replacement of the affected door handle.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Rattling, failure to open/close properly, water leaks.
  • Solution: Cleaning and lubricating the tracks, repairing or replacing the sunroof motor or seals.
  • Estimated Cost to Fix: $100 - $1,000+ depending on the severity.
  • Recalls: None Found

Summary

The 2016 BMW 428i is a stylish and fun-to-drive car but is not without its potential issues. Engine and transmission problems, particularly those relating to timing chains and mechatronic units, can be costly to repair. Electrical and suspension issues are also prevalent. While many owners experience trouble-free ownership, potential buyers should be aware of these common problems and budget accordingly for maintenance and repairs. The severity ranges from minor inconveniences to potentially catastrophic failures. The cost to repair ranges from a couple hundred dollars to thousands of dollars, so be sure to inspect the car thoroughly.