2018 BMW M240i

The 2018 BMW M240i is a popular compact sports car known for its performance and handling. It came standard with a turbocharged 3.0-liter inline-6 engine, producing 335 horsepower and 369 lb-ft of torque, paired with either a 6-speed manual or an 8-speed automatic transmission. The M240i is generally well-regarded for its engaging driving experience, powerful engine, and relatively practical size. Common criticisms include the sometimes-firm ride, the less-than-stellar interior quality for the price point, and the somewhat subdued exhaust note. The M240i is considered an upgrade to the 230i, but is a step below the M2.

Engine

B58 3.0L Turbocharged Inline-6

• Oil Filter Housing/Cooler Gasket Leak
  • Description/Symptoms: Oil leaks from the oil filter housing, often dripping onto other engine components. This can result in a burning oil smell and low oil levels. Visible oil around the oil filter housing is a sign.
  • Solution: Replacing the oil filter housing gasket and cooler gasket. Sometimes, the entire oil filter housing assembly needs to be replaced if warped or damaged.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found
• Coolant Leaks
  • Description/Symptoms: Coolant leaks can occur from various locations, including the radiator, hoses, water pump, or expansion tank. Symptoms include low coolant levels, overheating, and visible coolant puddles.
  • Solution: Identifying the source of the leak and replacing the faulty component. Common culprits include the water pump, thermostat housing, and radiator hoses.
  • Estimated Cost to Fix: $200 - $1200+ depending on the location and components.
  • Recalls: None Found
• VANOS Solenoid Issues
  • Description/Symptoms: Issues with the Variable Valve Timing (VANOS) solenoids can cause rough idling, decreased performance, and error codes.
  • Solution: Replacing the faulty VANOS solenoid(s).
  • Estimated Cost to Fix: $200 - $600+
  • Recalls: None Found

Transmission

ZF 8HP 8-Speed Automatic

• Rough Shifting/Hesitation
  • Description/Symptoms: Some owners report rough shifting, hesitation, or jerking during gear changes, particularly at lower speeds. This can be more pronounced when the transmission is cold.
  • Solution: Performing a transmission fluid flush and filter replacement. In some cases, a software update or valve body replacement may be necessary.
  • Estimated Cost to Fix: $300 - $2500+ depending on the severity and required repair.
  • Recalls: None Found

6-Speed Manual Transmission

• No Issues Found

Suspension

• Cracked or Worn Control Arm Bushings
  • Description/Symptoms: Front control arm bushings are prone to wear and cracking. Symptoms include clunking noises from the front suspension, especially over bumps, as well as vague steering feel.
  • Solution: Replacing the worn control arm bushings, ideally with upgraded aftermarket bushings for improved durability and performance. Replacing the entire control arm is also an option.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Electrical

• Battery Drain Issues
  • Description/Symptoms: Some owners have reported issues with excessive battery drain, leading to a dead battery, especially if the car sits for extended periods. This can be caused by faulty modules or systems not shutting down properly.
  • Solution: Diagnosing the source of the battery drain and repairing or replacing the faulty component. A parasitic draw test can help isolate the issue.
  • Estimated Cost to Fix: $100 - $1000+ depending on the component causing the drain.
  • Recalls: None Found
• iDrive System Glitches
  • Description/Symptoms: Intermittent freezing, lagging, or crashing of the iDrive infotainment system.
  • Solution: Performing a software update, or in more severe cases, replacing the iDrive control unit.
  • Estimated Cost to Fix: $100 - $1500+
  • Recalls: None Found

Exterior

• Fog Light Housing Cracking
  • Description/Symptoms: The plastic fog light housings can be susceptible to cracking, especially in colder climates or from road debris.
  • Solution: Replacing the fog light housing.
  • Estimated Cost to Fix: $100 - $300+
  • Recalls: None Found

Interior

• Rattling Noises
  • Description/Symptoms: Rattling noises from various areas of the interior, such as the dashboard, door panels, or rear shelf.
  • Solution: Identifying the source of the rattle and applying sound-deadening material or tightening loose components.
  • Estimated Cost to Fix: $50 - $500+ depending on the severity and where it comes from.
  • Recalls: None Found

Summary

The 2018 BMW M240i, while a generally reliable and enjoyable vehicle, does have some common issues to be aware of. Engine oil leaks and coolant leaks are notable concerns. Electrical glitches and suspension component wear are also prevalent. The severity and cost of repairs can vary greatly depending on the specific issue, but potential buyers should factor in the possibility of these repairs when considering ownership. The cost of repairs can vary greatly depending on the shop performing the repairs.