The contact owns a 2018 BMW 640XI. The contact stated that while pulling up to a red traffic light, the brake pedal was depressed; however, the engine revved unexpectedly, and the vehicle unintendedly accelerated and drove forward approximately 3-feet. The contact turned the vehicle off and restarted the engine and the engine continued to rev very high. The vehicle was restarted a second time and the unintended revving ceased and the vehicle operated normally. The following morning the vehicle was driven to the local dealer. The cause of the failure was not determined. The contact stated that the failure had occurred on one previous occasion. The manufacturer was notified of the failure. The failure mileage was 60,448.
The worst 2018 BMW 640XI problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Airbags2
- Acceleration1
- Visibility1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Airbags2
- Acceleration1
- Visibility1
Recalls
No recalls on record for this model year.
Technical service bulletins for the 2018 BMW 640XI 3
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
What 2018 BMW 640XI owners say
Most recent owner complaints, unedited.
I hear a crackling or a popping sound coming from the windshield area as I’m driving. It is irregular and going over bumps seems to trigger it but yesterday as I was driving on a smooth highway with no vehicles nearby I heard a deafeningly loud crack sound. Then I noticed a tiny crack in the windshield. The sound was so loud that I considered it a potential accident inducing distraction as it really frightened me for a few seconds. Again it couldn’t have come from an outside projectile as there were no vehicles nearby and the highway surface was perfectly free of pebbles or debris.
My BMW's passenger side airbag malfunction light randomly came on and will not turn off. When I went to the dealer, BMW quoted apprx. $3000 to replace the seat sensor mat which they said probably got wet? No water was ever on the seat and no passenger sits there - just my purse. I feel this is a safety related defect after seeing numerous reports and complaints online and trying to fix the issue. The warning message also blocks other important information on my dashboard.
Consistent passenger restraint / passenger airbag failure warning. Took vehicle to BMW dealership and was told that the passenger seat must have moisture damage, causing the issue. There have been no spills or leaks in the vehicle. Quoted $2600 to fix. See attached. Vehicle’s safety in question.
when opening the Panoramic Sunroof while driving, the curtain would not retract and sagged. It totally blocks the rear view and there is no way to fix it while driving. also if you have a car seat facing the rear, the curtain would falls onto baby's face and potentially cause suffocation
Moonroof shade failure. Droops, blocking rear window visibility while driving. Happened with no warning. Will bring to service center for inspection.
Compare the 2018 BMW 640XI
Other model years
20182019
Questions about the 2018 BMW 640XI
Is the 2018 BMW 640XI reliable?
Owners have filed 6 complaints about the 2018 BMW 640XI, close to a typical 640XI model year.
What is the most common problem with the 2018 BMW 640XI?
Airbags, with 2 complaints. Next is acceleration (1).
How many recalls does the 2018 BMW 640XI have?
No recalls on record.
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