Most common 2018 BMW 440i problems
Share of the 7 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
BMW 440i complaints by model year
2018 BMW 440i recalls (1)
Seat belts › Front
BMW of North America, LLC (BMW) is recalling certain 2018 430i, 430i xDrive, 440i, 440i xDrive, and M4 convertible vehicles. The Emergency Locking Retractors (ELR) within the front seat belt assemblies may have been produced with incompatible vehicle-sensitive locking mechanism housings.
Remedy: BMW will notify owners, and dealers will inspect and, if necessary replace, the front seat belt assemblies, free of charge. The recall began October 13, 2017. Owners may contact BMW customer service at 1-800-525-7417.
NHTSA defect investigations
Federal safety investigators have looked into a possible defect involving the 2018 BMW 440i:
Desiccated Air Bag Inflator Rupture
From 2000 through 2017, Takata produced millions of air bag inflators using two types of phase-stabilized ammonium nitrate ("PSAN") propellant -- propellant 2004 and propellant 2004L. After prolonged exposure to high temperature cycles and humidity, inflators using propellant 2004 can degrade, causing the propellant to burn too quickly when ignited.
What 2018 BMW 440i owners say
Electrical system
My husband bought a BMW through the military sales program, had it delivered to the United States, and we took it with us to Germany where we currently live. The car is made to U.S. specifications and I had been driving the car weekly in Germany to keep the battery running while he is away on a deployment. On April 11, 2022, as soon as I pressed the ignition button, the dashboard flashed a strange indicator light which I didn't have time to examine because my attention was immediately diverted when a metal bar next to the right rear headrest deployed from inside the seat and punched through the windshield. It sounded like someone threw a brick into the car. The check engine indicator also lit up but deactivated after a few minutes. …
There is already an SIB 513316 out on similar defects. Sloshing noises/water in pax compartment due to rain water intrusion that has caused damage in electronic modules in the trunk due to a defective drainage system--holes are not large enough. Failure of control units located in damaged area--which are no longer functioning such as convertible rooftop will not fuction, radio system, check engine light are just a few we have noticed togther with the recent battery replacement we made. Water is pooled in the luggage comparment and rear pax area. Poor drainage resulting from vehicle design defect. BMW needs to remove or modify the drain outlet to prevent repeat flooding. The warranty and extended warranty never checked for this-- drainholes functionality which results in electronic malfunctioning and safety concerns. …
Body & structure
My husband bought a BMW through the military sales program, had it delivered to the United States, and we took it with us to Germany where we currently live. The car is made to U.S. specifications and I had been driving the car weekly in Germany to keep the battery running while he is away on a deployment. On April 11, 2022, as soon as I pressed the ignition button, the dashboard flashed a strange indicator light which I didn't have time to examine because my attention was immediately diverted when a metal bar next to the right rear headrest deployed from inside the seat and punched through the windshield. It sounded like someone threw a brick into the car. The check engine indicator also lit up but deactivated after a few minutes. …
There is already an SIB 513316 out on similar defects. Sloshing noises/water in pax compartment due to rain water intrusion that has caused damage in electronic modules in the trunk due to a defective drainage system--holes are not large enough. Failure of control units located in damaged area--which are no longer functioning such as convertible rooftop will not fuction, radio system, check engine light are just a few we have noticed togther with the recent battery replacement we made. Water is pooled in the luggage comparment and rear pax area. Poor drainage resulting from vehicle design defect. BMW needs to remove or modify the drain outlet to prevent repeat flooding. The warranty and extended warranty never checked for this-- drainholes functionality which results in electronic malfunctioning and safety concerns. …
2018 BMW 440i engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.0L 6-cyl turbo | 8-speed automatic | RWD | 21 / 32 / 25 |
| 3.0L 6-cyl turbo | 8-speed automatic | AWD | 21 / 31 / 25 |
| 3.0L 6-cyl turbo | 6-speed manual | AWD | 19 / 29 / 23 |
| 3.0L 6-cyl turbo | 6-speed manual | RWD | 19 / 29 / 23 |
EPA ratings. Class: Compact car.
Frequently asked questions
Is the 2018 BMW 440i a good car?
That is a low number of complaints for a car on sale this long. So far owners have filed 7 complaints with NHTSA.
What is the most common problem with the 2018 BMW 440i?
The electrical system — 4 complaints, 57% of all complaints for this model year. Next are the body & structure (3) and air bags (2).
How many recalls does the 2018 BMW 440i have?
There is 1 recall for the 2018 BMW 440i, the most recent from August 16, 2017 (front). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
At what mileage do 2018 BMW 440i problems happen?
The median mileage reported in complaints is about 37,000 miles; 67% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.