2021 BMW M135i

Introduction:

The 2021 BMW M135i is a compact luxury hatchback that offers sporty handling and performance. It features a 2.0-liter turbocharged inline-four engine that produces 302 horsepower and 332 lb-ft of torque. The engine is paired with an 8-speed automatic transmission.

Despite its impressive performance, the M135i has received some criticism for its stiff ride quality and limited interior space. However, it remains a popular choice for enthusiasts who value driving dynamics and performance.

Engine

• 2.0L Turbocharged Inline-Four Engine:

  • Valvetrain Issues:
    • Symptoms: Excessive engine noise, loss of power, and check engine light.
    • Solution: Replacement of affected valvetrain components.
    • Estimated Cost to Fix: $2,000 - $3,000+
  • Turbocharger Issues:
    • Symptoms: Reduced boost pressure, loss of power, and excessive oil consumption.
    • Solution: Replacement of turbocharger.
    • Estimated Cost to Fix: $2,500 - $4,000+

• High-Pressure Fuel Pump Failure:

  • Symptoms: Difficulty starting the engine, loss of power, and check engine light.
  • Solution: Replacement of high-pressure fuel pump.
  • Estimated Cost to Fix: $1,500 - $2,000+
  • Recalls: None Found

Transmission

• 8-Speed Automatic Transmission:

  • Transmission Slipping:
    • Symptoms: Vehicle hesitates or jerks when shifting gears.
    • Solution: Replacement of transmission clutches or torque converter.
    • Estimated Cost to Fix: $2,500 - $4,000+
  • Mechatronic Unit Failure:
    • Symptoms: Transmission stuck in gear, erratic shifting, and check engine light.
    • Solution: Replacement of mechatronic unit.
    • Estimated Cost to Fix: $3,000 - $5,000+

Suspension

• No Issues Found

Electrical

• Headlight Control Module Failure:
  • Symptoms: Headlights malfunction or flicker.
  • Solution: Replacement of headlight control module.
  • Estimated Cost to Fix: $500 - $1,000+
  • Recalls: None Found
• Tailgate Release Switch Failure:
  • Symptoms: Tailgate cannot be opened from the rear handle.
  • Solution: Replacement of tailgate release switch.
  • Estimated Cost to Fix: $200 - $300+

Exterior

• Headlight Condensation:
  • Symptoms: Water droplets form inside the headlight housing.
  • Solution: Replacement of headlight housing or gaskets.
  • Estimated Cost to Fix: $500 - $1,000+

Interior

• Sunroof Creaking:
  • Symptoms: Creaking or rattling noise coming from the sunroof area when driving over bumps.
  • Solution: Lubrication of sunroof rails or replacement of sunroof motor.
  • Estimated Cost to Fix: $500 - $1,000+
• Central Display Blacking Out:
  • Symptoms: The central infotainment display suddenly goes black.
  • Solution: Software update or replacement of display unit.
  • Estimated Cost to Fix: $1,000 - $2,000+
  • Recalls: NHTSA Campaign Number: 21V772000

Summary:

While the 2021 BMW M135i offers impressive performance and driving dynamics, it has received some negative reports for engine and transmission issues. The severity of the issues can range from minor annoyances to major repairs that could cost thousands of dollars. Before purchasing a M135i, it is important to be aware of these potential problems and factor them into your decision.