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Mercedes-Benz AMG GLC43Model year report

2021 Mercedes-Benz AMG GLC43 Problems

Complaints
6filed with NHTSA
Median mileage
10,000miles, 1 complaints with mileage
Recalls
7campaigns 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
20 mpgcombined, 3.0L 6-cyl 4WD · 18 city / 24 hwy

Sources: NHTSA records for the 2021 Mercedes-Benz AMG GLC43 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 6 consumer complaints for the 2021 Mercedes-Benz AMG GLC43. The part named most often is engine, with 2 complaints (33% of the total), followed by electrical system (1) and exterior lighting (1). 1 of the complaints include a mileage, and 100% of those were filed for vehicles with under 50,000 miles; the median is 10,000 miles. NHTSA lists 7 recall campaigns and 186 technical service bulletins for this model year. Engine complaints overlap with 3 technical service bulletins filed under the same part. Electrical system complaints overlap with 1 recall campaign and 89 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

Engine: “At just 30,000 miles — less than half the mileage at which these failures are typically reported — my GLC 43 was found to have active oil leaks in multiple locations: 1. Front engine covers — oil is seeping from both the front cover gasket area and migrating downward along the engine block. The dealer recommends a full reseal of the front covers at a quoted cost of $1,944. 2. Radial shaft sealing ring of the front axle gear — is actively seeping gear oil, with a quoted repair cost of $1,718. My concern is not limited to cost. …”

NHTSA complaint #11742742, filed 2026-06

Electrical system: “Moisture began collecting inside the left headlight assembly, even though the housing should be sealed. Over time, the condensation increased and the front left turn signal failed. The vehicle displayed warning messages for the turn signal, low beams, Blind Spot Assist, Traffic Sign Assist, and Active Brake Assist. The failed turn signal reduces the vehicle's visibility to other drivers and creates a potential safety hazard. …”

NHTSA complaint #11754832, filed 2026-08

Exterior lighting: “2021 Mercedes GLC 43 headlight is inoperable. Same as reported in campaign 22V261000: Headlight failure can decrease visibility for both the driver and surrounding traffic, increasing the risk of a crash. Although our car was produced before the dates reported in campaign 22V261000, I believe this is the same defect and the recall should apply to all MY 2021 cars as this is a serious safety issue. The dealer will not repair under warranty.”

NHTSA complaint #11689974, filed 2025-09

Mileage when problems were reported

100% of the 1 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 10,000 and 10,000 miles.

0%0–10100%10–250%25–500%50–750%75–1000%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (1 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 10,000 miles.

Complaints by year filed

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

2023202520263
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 GLC43 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 GLC43 4matic 4WD3.0L 6-cyl9-speed automatic182420$4,100
AMG GLC43 4matic Coupe 4WD3.0L 6-cyl9-speed automatic172420$4,100

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 7 recalls for the 2021 Mercedes-Benz AMG GLC43 → · 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. 186 on record; the latest 10 are shown.

See all 186 bulletins →

Other model years of the Mercedes-Benz AMG GLC43

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
2021610,0007—20—Not enough data
2020515,4007—21—Not enough data
201962478—21—Not enough data
201865,00010—20—Not enough data

All Mercedes-Benz AMG GLC43 model years

Frequently asked questions

How many NHTSA complaints does the 2021 Mercedes-Benz AMG GLC43 have?

NHTSA recorded 6 consumer complaints for the 2021 Mercedes-Benz AMG GLC43 as of Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2021 Mercedes-Benz AMG GLC43 is reported most often?

Engine is named most often, in 2 complaints (33% of the total), followed by electrical system with 1.

Has the 2021 Mercedes-Benz AMG GLC43 been recalled?

NHTSA lists 7 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 GLC43 get?

The EPA rates the 2021 Mercedes-Benz AMG GLC43 (AMG GLC43 4matic, 3.0L 6-cyl) at 20 mpg combined, 18 city and 24 highway, with an estimated annual fuel cost of $4,100 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 GLC43 reported?

Among the 1 complaints that include a mileage, the median is 10,000 miles and the middle half falls between 10,000 and 10,000 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 31, 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.