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Mercedes-Benz AMG GLB35Model year report

2021 Mercedes-Benz AMG GLB35 Problems

Complaints
5filed with NHTSA
Median mileage
52,000miles, 3 complaints with mileage
Recalls
8campaigns 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, 2.0L 4-cyl 4WD · 21 city / 26 hwy

Sources: NHTSA records for the 2021 Mercedes-Benz AMG GLB35 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 5 consumer complaints for the 2021 Mercedes-Benz AMG GLB35. The part named most often is brakes, with 1 complaints (20% of the total), followed by engine (1) and suspension (1). 3 of the complaints include a mileage, and 33% of those were filed for vehicles with under 50,000 miles; the median is 52,000 miles. NHTSA lists 8 recall campaigns and 218 technical service bulletins for this model year. Brakes complaints overlap with 11 technical service bulletins filed under the same part. Engine complaints overlap with 10 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

Brakes: “The contact owned a 2021 Mercedes-Benz GLB35. The contact stated while driving at 35 MPH, the brake pedal was depressed; however, the vehicle failed to stop as intended. There was no warning light illuminated. The contact stated that neither the dealer nor an independent mechanic was contacted. The vehicle was not diagnosed or repaired. The contact stated that the vehicle was serviced months before the failure. The manufacturer was not made aware of the failure. The failure mileage was approximately 52,000.”

NHTSA complaint #11638919, filed 2025-01, 52,000 miles

Engine: “On 4/13/25 while driving my car on the highway, along with my 2 young children, I began to hear what initally sounded like a flapping noise. I rolled the windows down and after a minute or 2 the sound got lounder. There was never a warning or any type of safety icon that appeared on the control panel, nor any driving performance issue before hand. Shortly after the initial noise I could tell the car was struggling to accelerate. I wasn't near an exit during this time and began to panic in fear the car would shut down and I had no safe place to pull over on that stretch of highway. …”

NHTSA complaint #11660562, filed 2025-05

Suspension: “The contact owns a 2021 Mercedes-Benz AMG GLB35. The contact stated that while reversing down the driveway at approximately 4 MPH, the contact turned the steering wheel to the left and the vehicle started losing motive power. The contact stated that the RPMs were extremely high and the vehicle almost stalled. The contact stated no warning light was illuminated. The contact stated that the failure was intermittent and occurred at slower speeds between 3 and 6 MPH. …”

NHTSA complaint #11667631, filed 2025-06, 55,000 miles

Mileage when problems were reported

33% of the 3 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 22,000 and 55,000 miles.

0%0–1033%10–250%25–5067%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: 52,000 miles.

Complaints by year filed

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

2021202320253
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 2021 Mercedes-Benz AMG GLB35 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
AMG GLB35 4matic 4WD2.0L 4-cyl8-speed automatic212623$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

See all 8 recalls for the 2021 Mercedes-Benz AMG GLB35 → · 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. 218 on record; the latest 10 are shown.

See all 218 bulletins →

Other model years of the Mercedes-Benz AMG GLB35

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
2021552,0008—23—Not enough data

All Mercedes-Benz AMG GLB35 model years

Frequently asked questions

How many NHTSA complaints does the 2021 Mercedes-Benz AMG GLB35 have?

NHTSA recorded 5 consumer complaints for the 2021 Mercedes-Benz AMG GLB35 as of Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2021 Mercedes-Benz AMG GLB35 is reported most often?

Brakes is named most often, in 1 complaints (20% of the total), followed by engine with 1.

Has the 2021 Mercedes-Benz AMG GLB35 been recalled?

NHTSA lists 8 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2021 Mercedes-Benz AMG GLB35 get?

The EPA rates the 2021 Mercedes-Benz AMG GLB35 (AMG GLB35 4matic, 2.0L 4-cyl) at 23 mpg combined, 21 city and 26 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 2021 Mercedes-Benz AMG GLB35 reported?

Among the 3 complaints that include a mileage, the median is 52,000 miles and the middle half falls between 22,000 and 55,000 miles; 33% 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.