2021 BMW M240i

The 2021 BMW M240i is a performance-oriented coupe or convertible that offers a compelling blend of agility, power, and luxury. The M240i comes standard with a turbocharged 3.0-liter inline-six engine (B58) producing 382 horsepower and 369 lb-ft of torque. The only transmission offered is an 8-speed automatic. Many owners appreciate the M240i for its rapid acceleration, sharp handling, and relatively compact size, making it fun to drive on both city streets and winding roads. Some common complaints include a firm ride (especially with the optional adaptive suspension), limited rear seat space, and some may find the interior styling to be somewhat dated compared to newer BMW models.

Engine

B58 3.0L Turbocharged Inline-Six

• Coolant Leaks
  • Description/Symptoms: Coolant leaks often originate from the plastic thermostat housing or the expansion tank. Symptoms include low coolant level warnings, visible coolant puddles under the car, and a sweet coolant smell.
  • Solution: Replace the faulty thermostat housing or expansion tank with updated versions, preferably made of aluminum where available.
  • Estimated Cost to Fix: $300 - $700+
  • Recalls: None Found
• Oil Filter Housing Gasket Leak
  • Description/Symptoms: The oil filter housing gasket can become brittle and leak over time. This results in oil dripping onto the engine and potentially causing a burning smell.
  • Solution: Replace the oil filter housing gasket.
  • Estimated Cost to Fix: $200 - $500
  • Recalls: None Found

Transmission

8-Speed Automatic (ZF 8HP)

• Harsh Shifting/Hesitation
  • Description/Symptoms: Some owners have reported occasional harsh shifting or hesitation, particularly during downshifts or when accelerating from a stop.
  • Solution: While sometimes alleviated by a transmission software update, this issue can sometimes require a transmission service or replacement.
  • Estimated Cost to Fix: $100 (Software Update) - $6,000+ (Transmission Replacement)
  • Recalls: None Found

Suspension

• No Issues Found

Electrical

• Infotainment System Glitches
  • Description/Symptoms: The iDrive infotainment system can sometimes experience glitches such as freezing, slow response times, or connectivity issues with smartphones.
  • Solution: A software update may resolve the issue. More severe cases may require replacement of the iDrive control unit.
  • Estimated Cost to Fix: $0 (Software Update) - $1,500+ (iDrive Unit Replacement)
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• Seat Motor Failure
  • Description/Symptoms: The electric seat motor can fail, preventing the seat from adjusting properly.
  • Solution: Replace the faulty seat motor.
  • Estimated Cost to Fix: $300 - $800
  • Recalls: None Found

Summary

The 2021 BMW M240i is a generally reliable vehicle, but some common issues have been reported. The most frequent issues involve coolant leaks, the oil filter housing gasket and the transmission. Many of these issues can be resolved with preventative maintenance. The severity of these issues ranges from minor inconveniences to potentially costly repairs, with estimated costs ranging from a few hundred dollars for gasket replacements to several thousand for major component replacements like the transmission or iDrive unit.