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BMW 640IModel year report

2018 BMW 640I Problems

Complaints
5filed with NHTSA
Median mileage
19,000miles, 3 complaints with mileage
Recalls
2campaigns on record
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA crash rating
—no overall rating published
EPA fuel economy
23 mpgcombined, 3.0L 6-cyl RWD · 20 city / 29 hwy

Sources: NHTSA records for the 2018 BMW 640I (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 5 consumer complaints for the 2018 BMW 640I. The part named most often is forward collision avoidance, with 2 complaints (40% of the total), followed by electrical system (1) and engine (1). 3 of the complaints include a mileage, and 100% of those were filed for vehicles with under 50,000 miles; the median is 19,000 miles. Of all complaints, 1 involved a crash, according to the filers. NHTSA lists 2 recall campaigns and 279 technical service bulletins for this model year. Forward collision avoidance complaints overlap with 1 technical service bulletin filed under the same part. Electrical system complaints overlap with 102 technical service bulletins filed under the same part.

This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Example complaints

Forward collision avoidance: “The car on my right changed lanes and and hit the front of my car. Photo's of damage attached. The damage was to the right side of the bumper and panel on the front side. Police report attached. The carfax report printed 5/5/2021 shows damaged areas as front, right and rear. The damage was limited to the side front only and the car was drivable to the repair shop. The accident occurred 12/21/2018.”

NHTSA complaint #11416300, filed 2021-05, 19,000 miles

Mileage when problems were reported

100% of the 3 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 18,000 and 25,551 miles.

0%0–1067%10–2533%25–500%50–750%75–1000%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (3 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 19,000 miles.

Complaints by year filed

Fewer than 15 complaints, too few for a reliable trend.

20202021220222023
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Fuel economy and running cost

EPA ratings for each 2018 BMW 640I version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).

VersionEngineTransmissionCityHwyComb.Fuel / yr
640i Convertible RWD3.0L 6-cyl8-speed automatic202923$3,550
640i Gran Coupe RWD3.0L 6-cyl8-speed automatic202923$3,550
640i xDrive Convertible AWD3.0L 6-cyl8-speed automatic192822$3,750
640i xDrive Gran Coupe AWD3.0L 6-cyl8-speed automatic192822$3,750
640i xDrive Gran Turismo AWD3.0L 6-cyl8-speed automatic202823$3,550

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

Recall details for the 2018 BMW 640I → · Check a VIN at nhtsa.gov/recalls

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 279 on record; the latest 10 are shown.

See all 279 bulletins →

Other model years of the BMW 640I

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
2018519,0002—23—Not enough data
2015516,7501—24—Not enough data
2014749,4580—23—Not enough data
2013665,0000—24—Not enough data

All BMW 640I model years

Frequently asked questions

How many NHTSA complaints does the 2018 BMW 640I have?

NHTSA recorded 5 consumer complaints for the 2018 BMW 640I as of Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2018 BMW 640I is reported most often?

Forward collision avoidance is named most often, in 2 complaints (40% of the total), followed by electrical system with 1.

Has the 2018 BMW 640I been recalled?

NHTSA lists 2 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2018 BMW 640I get?

The EPA rates the 2018 BMW 640I (640i Convertible, 3.0L 6-cyl) at 23 mpg combined, 20 city and 29 highway, with an estimated annual fuel cost of $3,550 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2018 BMW 640I reported?

Among the 3 complaints that include a mileage, the median is 19,000 miles and the middle half falls between 18,000 and 25,551 miles; 100% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.