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2021 Mercedes-Benz GLC problems: engine and transmission complaints and recalls
68% of relevant owner complaints filed with NHTSA on the 2021 Mercedes-Benz GLC are about the engine, transmission or fuel system. Well over half of everything owners reported is the drivetrain. That is a severe model-level pattern; every model year we track at this level has a documented failure behind it.
Worse than 90% of the 1,790 model years we track (2010–2023).
Excludes 13 airbag, lighting and seat-belt recall complaints that would otherwise mask the signal (unadjusted: 55%).
Does the 2021 Mercedes-Benz GLC have engine problems?
Owner complaints say yes, heavily, as a model-year pattern. 36 of 53 relevant complaints filed with NHTSA about the 2021 Mercedes-Benz GLC concern the engine, transmission or fuel system (68%), and the largest group is filed under engine (30). For comparison, the 2020 scores 44% and the 2022 scores 36%. On a test drive, check for stalling, loss of power, rough idle, oil consumption or a check-engine light. This describes the model year, not any one car: a well-maintained or already-repaired example can be fine, and a clean model year can still have a bad car in it.
Complaints by component
The years either side
Manufacturers fix things mid-generation. A bad year next to a clean one is common; the fix usually arrived in between.
How the 2021 compares with other Mercedes-Benz GLC years
Of the 8 Mercedes-Benz GLC years with enough complaints to score, the 2021 is the worst on engine and transmission share (68%). The best is the 2019 (34%). By volume, the 2021 drew 66 complaints (36 drivetrain), against 80 for the 2020 and 62 for the 2022.
Mercedes-Benz GLC years to avoid and best years →
2016 GLC problems · 2017 GLC problems · 2018 GLC problems · 2019 GLC problems · 2020 GLC problems · 2021 · 2022 GLC problems · 2023 GLC problems
The rest of the picture on the 2021 Mercedes-Benz GLC
- What the repair costs. Typical engine repair ranges, to price into your offer.
- Cleaner alternatives. Similar cars and nearby years with a better record.
- Up to 15 owner reports, with the ones about your car's own engine first.
- What to ask the seller and what to check on the test drive, for this car.
- Two cars side by side, if you are deciding between them.
What one owner reported
One of 36 drivetrain complaints. The full report shows up to 15, with quotes about the engine in the car you are looking at first.
Checking one particular 2021 Mercedes-Benz GLC? This page is about the model year. Accidents, title brands and odometer records belong to the individual car, and that is what a vehicle history report covers.
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Does the 2021 Mercedes-Benz GLC have engine problems?
Owner complaints say yes, heavily, as a model-year pattern. 36 of 53 relevant complaints filed with NHTSA about the 2021 Mercedes-Benz GLC concern the engine, transmission or fuel system (68%). Before buying one, have an independent mechanic check the engine and ask the seller whether it has been repaired or replaced.
What is the most common problem with the 2021 Mercedes-Benz GLC?
Going by NHTSA owner complaints, the most common problem filed against the 2021 Mercedes-Benz GLC is engine: 30 of 66 complaints (45%) name it, followed by exterior lighting (13) and fuel/propulsion system (10). A complaint can name more than one component, so these overlap.
Is the 2021 Mercedes-Benz GLC reliable?
On the engine and transmission, owner complaints point to a weak spot: 68% of relevant complaints filed with NHTSA concern the drivetrain (very high signal). That is worse than 90% of the 1,790 model years we track. Among the 8 Mercedes-Benz GLC years we score, it ranks worst. Complaint data describes the model year, not one car, and it says nothing about trim, paint or electronics outside the drivetrain; an independent inspection still decides it.
Are there engine or transmission recalls on the 2021 Mercedes-Benz GLC?
NHTSA lists no recall campaigns on the 2021 Mercedes-Benz GLC.
Which Mercedes-Benz GLC years are better?
Among the Mercedes-Benz GLC years we track, the 2019 (34%), the 2023 (34%) and the 2022 (36%) have a lower engine and transmission complaint share than the 2021 (68%). Manufacturers fix things mid-generation, so the year before or after can be a different car. Every year side by side: https://thelanecheck.com/cars/mercedes-benz-glc
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Check a VINExperimental model-level information. This is not a vehicle inspection, vehicle-history report, financial advice or purchase recommendation. It describes patterns across a model year, not the condition of any individual vehicle.