2021 BMW M440i
Here’s a breakdown of common issues reported for the 2021 BMW M440i, formatted for your website, covering engine, transmission, and other component categories.
The 2021 BMW M440i is a performance-oriented version of the 4 Series, prized for its blend of luxury, sporty handling, and potent power. It is generally well-received for its sleek design and powerful acceleration. The most common engine option is the B58 3.0L turbocharged inline-6 engine, producing 382 horsepower and 369 lb-ft of torque. Some owners appreciate the responsive handling and premium interior, while others have noted concerns regarding the run-flat tires’ ride quality and the complexity of the iDrive system. There is also the B46 2.0L Turbocharged Inline-4 engine, producing 255 horsepower and 295 lb-ft of torque, which is the engine on the standard 430i. The M440i comes standard with an 8-speed automatic transmission.
Engine
B58 3.0L Turbocharged Inline-6
- Coolant Leaks
- Description/Symptoms: Coolant leaks, often detected by a low coolant warning light or visible coolant under the car. Leaks may originate from the water pump or coolant hoses.
- Solution: Replace the faulty water pump or leaking coolant hoses. A pressure test can help pinpoint the exact location of the leak.
- Estimated Cost to Fix: $600 - $1200+
- Recalls: None Found
- Oil Filter Housing Gasket Leak
- Description/Symptoms: Oil leak near the front of the engine, often noticed as a burning oil smell.
- Solution: Replace the oil filter housing gasket.
- Estimated Cost to Fix: $300 - $600+
- Recalls: None Found
B46 2.0L Turbocharged Inline-4
- Turbocharger Failure
- Description/Symptoms: Loss of power, excessive oil consumption, whistling noises from the turbocharger, and potential engine misfires.
- Solution: Replacement of the turbocharger. It is recommended to inspect oil lines and related components for any blockages or damage that may have contributed to the failure.
- Estimated Cost to Fix: $1500 - $3000+
- Recalls: None Found
Transmission
8-Speed Automatic (All Engine Options)
- Rough Shifting/Hesitation
- Description/Symptoms: Harsh or delayed shifts, particularly between certain gears. Some drivers report hesitation when accelerating from a stop.
- Solution: Could involve a software update of the transmission control module (TCM) or, in more severe cases, replacement of the valve body or the entire transmission.
- Estimated Cost to Fix: $200 - $500+ (software update), $1500 - $4000+ (valve body/transmission)
- Recalls: None Found
- Transmission Fluid Leak
- Description/Symptoms: Transmission fluid leak near the transmission pan, which can be caused by a damaged pan or gasket.
- Solution: Replace the transmission pan and gasket.
- Estimated Cost to Fix: $400 - $800+
- Recalls: None Found
Suspension
- Adaptive Suspension Malfunctions
- Description/Symptoms: Error messages related to the adaptive dampers, uneven ride height, or a significantly harsher ride quality.
- Solution: Diagnose the specific issue, which could involve a faulty damper, ride height sensor, or wiring issue. Replacement of the affected component is typically required.
- Estimated Cost to Fix: $500 - $1500+ per damper/sensor
- Recalls: None Found
Electrical
- iDrive System Issues
- Description/Symptoms: Freezing, lagging, or unexpected reboots of the iDrive infotainment system.
- Solution: Often resolved with a software update. In some cases, replacement of the iDrive head unit may be necessary.
- Estimated Cost to Fix: $0 - $300 (software update), $1000 - $2500+ (head unit replacement)
- Recalls: None Found
- Sensor Malfunctions (Parking Sensors, etc.)
- Description/Symptoms: Erratic behavior or failure of parking sensors, causing false alarms or complete lack of functionality.
- Solution: Inspection and replacement of the faulty sensor.
- Estimated Cost to Fix: $200 - $500+ per sensor
- Recalls: None Found
- Battery Drain
- Description/Symptoms: The vehicle’s battery drains overnight or within a few days of non-use, leading to difficulty starting the car.
- Solution: Perform a parasitic draw test to identify the component causing the drain. Common culprits include aftermarket accessories installed improperly, faulty control modules, or a failing battery. Address the root cause of the draw.
- Estimated Cost to Fix: $100 - $300+ (diagnostics), cost varies significantly depending on the cause and repair.
- Recalls: None Found
Exterior
- Tail Light LED Failure
- Description/Symptoms: Individual LEDs within the tail light assembly stop working, resulting in a partial or non-functional tail light.
- Solution: Replacement of the entire tail light assembly.
- Estimated Cost to Fix: $400 - $800+
- Recalls: None Found
Interior
- Seat Heater Malfunction
- Description/Symptoms: The seat heater fails to warm up, only partially heats, or becomes excessively hot.
- Solution: Diagnose and replace the faulty heating element, control module, or wiring.
- Estimated Cost to Fix: $300 - $800+
- Recalls: None Found
Summary
The 2021 BMW M440i, while generally reliable, does exhibit some common issues. Engine-related problems like coolant leaks and oil filter housing gasket leaks can occur. Transmission issues, especially rough shifting, may require software updates or more involved repairs. Electrical glitches, particularly with the iDrive system and sensor malfunctions, are also reported. Suspension problems and interior component failures are less frequent but possible. Overall, the severity and cost of these issues vary widely, with some being minor and inexpensive to fix, while others can be more significant and costly. Potential buyers should be aware of these potential issues and perform a thorough inspection before purchasing.