2018 Mercedes-Benz GLA problems: engine and transmission complaints and recalls
HIGH COMPLAINT SIGNAL
48%
21 of 44 relevant owner complaints are about the engine, transmission or fuel system
48% of relevant owner complaints filed with NHTSA on the 2018 Mercedes-Benz GLA are about the engine, transmission or fuel system. That is a model-level pattern, not bad luck.
Worse than 61% of the 1,789 model years we track (2010–2023).
Excludes 7 airbag, lighting and seat-belt recall complaints that would otherwise mask the signal (unadjusted: 41%).
Does the 2018 Mercedes-Benz GLA have engine problems?
Owner complaints say yes, as a model-year pattern. 21 of 44 relevant complaints filed with NHTSA about the 2018 Mercedes-Benz GLA concern the engine, transmission or fuel system (48%), and the largest group is filed under engine (10). For comparison, the 2017 scores 47% and the 2019 scores 56%. 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.
The percentage is each model year's drivetrain complaint share. No elevated signal describes the model year, not any one car; a well-kept example of a flagged model can still be the right buy, and any of these still needs an inspection.
What owners reported
ENGINE,FUEL/PROPULSION SYSTEM06/22/2026
I am filing a complaint regarding my 2018 Mercedes-Benz GLA 250. My vehicle recently triggered a check engine light and was diagnosed by an independent mechanic with code P052E, related to the positive crankcase ventilation regulator valve / crankcase ventilation system. My mechanic advised that this issue appears to …
ENGINE02/26/2026
Why is the Crankcase Ventilation System P052E Code (PCV) covered in most Mercedes models, but not the GLA? This is an expensive repair that seems to cover other cars but penalizes GLA owners just to have a safe car to drive like the other models. I strongly believe GLA should be on the recall list for the matter, as it…
UNKNOWN OR OTHER,ENGINE09/14/2025
This vehicle has a transmission control module defect. While driving, the car cuts off unexpectedly and prevents shifting gears, creating a serious safety risk that could easily cause an accident. A certified Mercedes-Benz dealer diagnosed the problem and confirmed it is an internal defect—one that cannot be prevented …
Three of 21 drivetrain complaints. The full report shows more, with quotes about the engine in the car you are looking at first.
Before you buy a 2018 Mercedes-Benz GLA
Ask the seller whether the engine has ever been repaired or replaced, and whether the car has shown stalling, loss of power, rough idle, oil consumption or a check-engine light.
Drive it from a cold start and long enough to warm up. Many engine faults hide once the car is warm.
Get an independent pre-purchase inspection from a mechanic you choose, and tell them to focus on the engine.
Ask for service records. A engine already replaced under warranty is a different car from one that was not.
Questions people ask about the 2018 Mercedes-Benz GLA
Does the 2018 Mercedes-Benz GLA have engine problems?
Owner complaints say yes, as a model-year pattern. 21 of 44 relevant complaints filed with NHTSA about the 2018 Mercedes-Benz GLA concern the engine, transmission or fuel system (48%). Before buying one, have an independent mechanic check the engine and ask the seller whether it has been repaired or replaced.
Are there engine or transmission recalls on the 2018 Mercedes-Benz GLA?
NHTSA lists no recall campaigns on the 2018 Mercedes-Benz GLA.
Which Mercedes-Benz GLA years are better?
Among the Mercedes-Benz GLA years we track, the 2017 (47%) has a lower engine and transmission complaint share than the 2018 (48%). Manufacturers fix things mid-generation, so the year before or after can be a different car.
Should I buy a 2018 Mercedes-Benz GLA?
That depends on the car in front of you, not just the model year. The 2018 Mercedes-Benz GLA has an elevated engine complaint pattern, so treat it as a car that needs proof: service records showing engine work, a cold-start test drive, and an independent pre-purchase inspection focused on the engine. A well-kept or already-repaired example can be a fine car; an unknown one is a gamble.
Have the VIN?Paste it and get the full report for that car. First report free, then a 30-day pass covers a whole car search.
Experimental 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.