Most common 2015 BMW 640i problems
Share of the 5 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
BMW 640i complaints by model year
Best 640i years: 2012, 2015. Compare all years →
2015 BMW 640i recalls (1)
Air bags › Frontal › Driver side › Inflator module
BMW of North America, LLC (BMW) is recalling certain 2015 6 Series Gran Coupe, 2014 5 Series Gran Turismo, 2014 5 Series Sedan, 2015 6 Series Convertible, 2015 6 Series Coupe, 2014 X5, 2013-2014 X3, 2014-2015 3 Series Sedan, 2014 4 Series Coupe, 2014 4 Series Convertible, 2014 3 Series Gran Turismo, and 2015 4 Series Gran Coupe…
Remedy: The driver's front air bag will be replaced, free of charge. Owner notification letters were mailed September 6, 2024. 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 2015 BMW 640i:
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.
2015 BMW 640i engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.0L 6-cyl turbo | 8-speed automatic | RWD | 21 / 31 / 25 |
| 3.0L 6-cyl turbo | 8-speed automatic | AWD | 20 / 29 / 23 |
EPA ratings. Class: Subcompact car.
Frequently asked questions
Is the 2015 BMW 640i a good car?
Based on 5 owner complaints filed with NHTSA, the 2015 640i rates average: 25% fewer complaints than a typical year of the 640i at the same age. It is one of the best 640i years by this measure. Complaint counts don't account for sales volume or individual maintenance, so have any used car inspected before buying.
What is the most common problem with the 2015 BMW 640i?
The electrical system — 2 complaints, 40% of all complaints for this model year. Next are the wheels & tires (2) and brakes (1).
How many recalls does the 2015 BMW 640i have?
There is 1 recall for the 2015 BMW 640i, the most recent from July 11, 2024 (inflator module). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the BMW 640i?
The best years by complaints, compared at the same age, are 2012 and 2015. See the full BMW 640i years comparison.
At what mileage do 2015 BMW 640i problems happen?
The median mileage reported in complaints is about 23,000 miles; 100% 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.