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Mercedes-Benz G 550Model year report

2021 Mercedes-Benz G 550 Problems

Complaints
7filed with NHTSA
Median mileage
—no mileage reported
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
18 mpgcombined, 4.0L 8-cyl 4WD · 17 city / 19 hwy

Sources: NHTSA records for the 2021 Mercedes-Benz G 550 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 7 consumer complaints for the 2021 Mercedes-Benz G 550. The part named most often is electrical system, with 4 complaints (57% of the total), followed by engine (3) and fuel system (2). Of all complaints, 1 involved a crash, 1 a fire, 15 an injury, according to the filers. NHTSA lists 7 recall campaigns and 132 technical service bulletins for this model year. Electrical system complaints overlap with 1 recall campaign and 46 technical service bulletins filed under the same part. Engine complaints overlap with 21 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

Electrical system: “Driving 2021 Mercedes-Benz G-550 for approximately 8min. Preceding East on a 3 lane South Florida Highway no more than 40 mph. Gas tank 75% full with V-Power From Shell. (filled-3 days prior). Proceeded from the middle lane to the right lane in-order to make a sharp right handed turn onto up coming Shopping Center, that was two lights away. I had turned on my 21 MB G550 air conditioner to auto (off prior). While I was attempting to switch on my turn signal the car suddenly turns-off completely in mid-drive. …”

NHTSA complaint #11485579, filed 2022-09

Engine: “While pulling away from a red light, the vehicle jolted a small amount, then it shut down, only providing power to the dashboard, which produced an array of safety warnings. Power steering and throttle were completely dead leaving me powerless in traffic. I pulled to the shoulder of the road, placed the vehicle in park (as it seems that the failure put the car into neutral). I was able to restart the vehicle and continue driving home with no warning lights or issues. (Several other owners are having this same issue-I found them by googling the problem). …”

NHTSA complaint #11421207, filed 2021-06

Fuel system: “The vehicle has fuel smell coming thru cabin vents. Opening the hood the vehicle also has strong fuel smell in engine bay. The hose supplying the fuel rails is cracked and damaged and does not have any heat sheild to prevent the hose from deteriorating.”

NHTSA complaint #11768693, filed 2026-10

Air bags: “Front Door harness rubs and frays causing the wires to short out. The front windows and door locks work intermittently. SRS failure lights up on dash.”

NHTSA complaint #11768237, filed 2026-10

Complaints by year filed

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

2021202220232024220262
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 G 550 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
G550 4WD4.0L 8-cyl9-speed automatic171918$4,550

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 7 recalls for the 2021 Mercedes-Benz G 550 → · 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. 132 on record; the latest 10 are shown.

See all 132 bulletins →

Other model years of the Mercedes-Benz G 550

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
20217—7—18—Not enough data
201951,92512—14—Not enough data
2013564,1382—13—Not enough data

All Mercedes-Benz G 550 model years

Frequently asked questions

How many NHTSA complaints does the 2021 Mercedes-Benz G 550 have?

NHTSA recorded 7 consumer complaints for the 2021 Mercedes-Benz G 550 as of Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2021 Mercedes-Benz G 550 is reported most often?

Electrical system is named most often, in 4 complaints (57% of the total), followed by engine with 3.

Has the 2021 Mercedes-Benz G 550 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 G 550 get?

The EPA rates the 2021 Mercedes-Benz G 550 (G550, 4.0L 8-cyl) at 18 mpg combined, 17 city and 19 highway, with an estimated annual fuel cost of $4,550 at 15,000 miles a year. Other engine and drive versions are rated differently.

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.