2018 BMW 640XI Owner Complaints

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.

NHTSA ID

11745694

Incident

May 28, 2026

Mileage

60,448 mi

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.

NHTSA ID

11725479

Incident

Mar 18, 2026

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.

NHTSA ID

11610978

Incident

Nov 1, 2023

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.

NHTSA ID

11580338

Incident

Mar 29, 2024

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

NHTSA ID

11559048

Incident

May 9, 2023

Moonroof shade failure. Droops, blocking rear window visibility while driving. Happened with no warning. Will bring to service center for inspection.

NHTSA ID

11545767

Incident

Sep 17, 2023