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Other or unknownPart report

2018 BMW 640XI Other or unknown Problems

Complaints
2about this part
Share
33%of 6 total for the year
Median mileage
—not reported
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 2 complaints about the other or unknown of the 2018 BMW 640XI, 33% of the 6 complaints for this model year.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“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 complaint #11725479, filed 2026-03

“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 complaint #11559048, filed 2023-12

Other or unknown: other model years

YearComplaintsShare of year
2018233%

Other parts of the 2018 BMW 640XI

Air bags
2 complaintsVehicle speed control
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints

← All problems reported for the 2018 BMW 640XI

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology