2023 BMW 440i Gran Coupe

The 2023 BMW 440i Gran Coupe is a stylish and sporty four-door coupe that offers a blend of performance and practicality. The most popular engine in this configuration is the B58 3.0-liter turbocharged inline-six, producing 382 horsepower and 369 lb-ft of torque. Other engine options include the B48 2.0-liter turbocharged inline-four found in the 430i, producing 255 horsepower and 295 lb-ft of torque. The only transmission available is an 8-speed automatic transmission. Owners generally appreciate the 440i Gran Coupe for its powerful engine, agile handling, and luxurious interior. Some common dislikes include the firm ride quality (especially with the M Sport suspension), the somewhat limited rear headroom due to the sloping roofline, and the complexity of the iDrive infotainment system, but the B58 makes up for these issues.

Engine

B58 3.0-liter Turbocharged Inline-Six

• Coolant Leaks
  • Description/Symptoms: Coolant leaks are a common issue on B58 engines. Leaks often originate from the plastic thermostat housing, water pump, or coolant hoses. Symptoms include low coolant levels, overheating, and visible coolant leaks under the car.
  • Solution: Replace the faulty thermostat housing, water pump, and/or coolant hoses with updated parts, ideally made of aluminum where possible.
  • Estimated Cost to Fix: $500 - $1500+
• Oil Filter Housing Gasket Leak
  • Description/Symptoms: The oil filter housing gasket can degrade over time, leading to oil leaks. Signs include oil drips under the car and oil accumulation around the oil filter housing.
  • Solution: Replace the oil filter housing gasket.
  • Estimated Cost to Fix: $300 - $600+
• Valve Cover Gasket Leak
  • Description/Symptoms: The valve cover gasket can degrade over time, leading to oil leaks. Signs include oil drips under the car and oil accumulation around the valve cover.
  • Solution: Replace the valve cover gasket.
  • Estimated Cost to Fix: $500 - $1000+

B48 2.0-liter Turbocharged Inline-Four

• Timing Chain Issues
  • Description/Symptoms: While less common in the B48 than some earlier BMW engines, timing chain issues can still arise. Symptoms include a rattling noise from the engine, especially on startup, and potential engine misfires.
  • Solution: Replace the timing chain, guides, and tensioner.
  • Estimated Cost to Fix: $1500 - $3000+

Transmission

8-Speed Automatic (ZF 8HP)

• Rough Shifting
  • Description/Symptoms: Some owners report experiencing rough or delayed shifts, particularly between lower gears. This can manifest as a noticeable “clunk” or hesitation during acceleration.
  • Solution: In some cases, a software update to the transmission control module (TCM) can resolve the issue. In more severe cases, valve body replacement or a full transmission rebuild may be necessary.
  • Estimated Cost to Fix: $200 (software update) - $5000+ (transmission rebuild)
  • Recalls: None Found

Suspension

• No Issues Found

Electrical

• iDrive System Glitches
  • Description/Symptoms: The iDrive infotainment system can occasionally experience glitches, such as screen freezes, unresponsive controls, or Bluetooth connectivity problems.
  • Solution: Try restarting the iDrive system. If the problem persists, a software update from the dealer may be required.
  • Estimated Cost to Fix: $0 (restart) - $200+ (software update)
  • Recalls: None Found
• Sensor Malfunctions
  • Description/Symptoms: Some sensors related to driver-assistance features (e.g., parking sensors, lane departure warning) may malfunction, triggering warning lights on the dashboard.
  • Solution: Diagnose the faulty sensor and replace it.
  • Estimated Cost to Fix: $200 - $800+

Exterior

• No Issues Found

Interior

• Seat Creaking/Rattling
  • Description/Symptoms: Some owners have reported creaking or rattling noises emanating from the seats, particularly the driver’s seat.
  • Solution: Tighten or lubricate seat components. In some cases, seat frame replacement may be necessary.
  • Estimated Cost to Fix: $100 - $500+

Summary

The 2023 BMW 440i Gran Coupe, while generally reliable, can experience a few common issues. Engine issues such as coolant and oil leaks are common and can range in cost. Transmission issues involving the 8-speed automatic can be costly if a full rebuild is needed. Electrical glitches with the iDrive system and sensor malfunctions are also possible. The B58 engine option is generally considered to be more reliable than the B48, however the inline-six engine still has its issues. Potential buyers should be aware of these potential problems and factor them into their purchasing decision, especially if considering a used model with higher mileage.