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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%).

NHTSA data checked October 3, 2026
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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.

Drivetrain complaints
21
engine, transmission, fuel
Total complaints
51
this model year
Fires reported
1
owner-reported
Recall campaigns
0
3 crashes · 1 injuries

Complaints by component

ELECTRICAL SYSTEM11 · 22%
UNKNOWN OR OTHER10 · 20%
ENGINE10 · 20%
AIR BAGS6 · 12%
POWER TRAIN6 · 12%
FUEL/PROPULSION SYSTEM5 · 10%

The years either side

2010
no data
2011
no data
2012
no data
2013
no data
2014
no data
2015
54%
48 of 101
2016
52%
23 of 52
2017
47%
14 of 34
2018
48%
21 of 51
2019
56%
15 of 30
2020
too few complaints
2021
too few complaints
2022
too few complaints
2023
too few complaints

Manufacturers fix things mid-generation. A bad year next to a clean one is common; the fix usually arrived in between.

Cleaner alternatives

Other luxury SUVs with no elevated signal in 2018

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

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.

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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.