Reliability
Is the Mercedes-Benz GLA reliable? Honest answer.
Is the Mercedes-Benz GLA a reliable car? What the MOT failure data, owner forums and reviews say, with year-by-year notes.
Updated 4th September 2026 DVSA data: Across 90,019 recorded MOT tests, 14.2% failed.
More on the Mercedes-Benz GLA
TL;DR
The Mercedes-Benz GLA generally provides a reliable driving experience, particularly in the 2018 and 2019 models. However, earlier years, especially 2015 and 2016, have reported more issues, including electrical faults and air conditioning problems. MOT pass rates vary, with an overall pass rate around 80%.
MOT Pass Rates
The Mercedes-Benz GLA has shown varied MOT pass rates. According to the UK Government MOT failure data, the GLA’s overall pass rate sits around 80%. However, certain years like 2015 and 2016 have reported higher failure rates, primarily due to electrical issues and suspension problems.
Common Failure Modes
Common faults reported by owners include issues with the air conditioning system, electrical faults, and engine management system failures. The 2015 and 2016 models are particularly prone to these issues.
Year-by-Year Analysis
- 2015-2016: These early models have higher failure rates, mainly due to electrical and suspension issues. Specific problems reported include faulty wiring and issues with the braking system.
- 2017: Improvements were made, leading to a better reliability rating. Owners reported fewer electrical faults and better overall performance.
- 2018-2019: These models are generally regarded as the most reliable, with fewer reported issues. Owners have praised their performance and comfort.
- 2020 onwards: Newer models continue to perform well, but it’s essential to check for any recalls or software updates. Some owners have mentioned minor issues with infotainment systems in these later models.
Owner Feedback
While many appreciate the GLA’s comfort and driving dynamics, others highlight concerns with reliability, especially in earlier models. The consensus suggests that thorough checks on service history and common faults can help mitigate risks.
What people are asking
Do Mercedes GLA have issues?
Yes, some Mercedes GLA models do experience issues, particularly the earlier years like 2015 and 2016, which have reported higher failure rates. Common problems include electrical faults and air conditioning failures, which can be costly to repair.
Is a Mercedes GLA a good car to buy?
The Mercedes GLA can be a good car to buy, especially the 2018 and 2019 models, which are known for their reliability. However, potential buyers should carefully inspect the vehicle’s service history and be aware of common issues associated with earlier models.
Is GLA expensive to maintain?
Maintenance costs for the Mercedes GLA can be on the higher side, particularly if electrical issues arise or if repairs are needed for the air conditioning system.
What is the most reliable year of GLA?
The most reliable years for the Mercedes GLA are generally considered to be 2018 and 2019. These models have fewer reported issues and better overall performance compared to earlier versions.
What owners say
A common theme is the disappointment with early models, particularly the 2015 and 2016 versions, which have been flagged for numerous electrical issues. Some owners have reported feeling regret after their purchase, citing reliability concerns as a primary issue. Many owners have expressed mixed feelings about their GLA experience.
In contrast, owners of the 2018 and 2019 models often share positive experiences, highlighting their reliability and comfort. Many appreciate the driving dynamics and the overall feel of the vehicle. Owners have noted that these models tend to have fewer problems, making them a safer choice for used buyers.
However, some owners have pointed out that even newer models are not without faults. Issues with infotainment systems and minor electrical glitches have been reported, although these problems are generally less severe than those seen in earlier years. Buyers in UK communities have flagged the importance of checking for any recalls or software updates when considering a purchase.
Overall, while the GLA offers a premium driving experience, potential buyers should be aware of the specific model years to avoid and the common issues that may arise.
Mercedes-Benz GLA recall record
44 recalls have been issued for the Mercedes-Benz GLA, between 2015 and 2025.
SRPC2515 - Short-range sensor front
R/2025/439Issued 13 November 2025
Mercedes-Benz AG has determined that on certain A-Class (177 platform) C-Class (206 platform) EQA (243 platform) GLA (247 platform) GLC (254 platform) EQE (295 platform) V-Class (447 platform) and G-Class (465 platform) vehicles the circuit board of the front short-range sensor might not meet specifications.
Remedy:As a remedy Mercedes-Benz AG via its Mercedes-Benz service partners will replace the short-range sensor on the affected vehicles
Affects cars built May 2025 to May 2025
SRPC2415 - Sealing Ring of Exhaust Manifold
R/2024/392Issued 18 October 2024
On affected vehicles the sealing ring between the exhaust manifold and turbocharger might be missing.
Remedy:Retrofit the sealing ring on the affected vehicles.
Affects cars built May 2023 to May 2023
SRPC2404 – Backup function of steering software
R/2024/166Issued 6 May 2024
On affected vehicles the backup function of the steering software might not meet specifications. As a result the steering power support might be impaired and a loss of steerability cannot be ruled out.
Remedy:Update the software of the electric steering on the affected vehicles.
Affects cars built Jun 2019 to Jan 2024
On affected vehicles the panel located between the windshield and the panoramic sunroof might not have been bonded correctly during a prior service repair.
R/2024/024Issued 7 February 2024
On affected vehicles the panel located between the windshield and the panoramic sunroof might not have been bonded correctly during a prior service repair.
Remedy:Check the front fixed element of the panoramic sliding sunroof and replace if necessary.
Affects cars built Dec 2014 to Apr 2016
40 older recalls not shown.
A recall applies to a build range, not to every car of this model. Check a registration to see whether one specific vehicle has an outstanding recall.
Mercedes-Benz GLA MOT record
From 90,019 recorded MOT tests, 14.2% failed.
| Registered | Tests | Failed | Median mileage |
|---|---|---|---|
| 2023 | 215 | 3.7% | 18,448 mi |
| 2022 | 4,657 | 6.8% | 22,662 mi |
| 2021 | 8,536 | 6.8% | 31,591 mi |
| 2020 | 8,786 | 8.6% | 33,874 mi |
| 2019 | 16,435 | 12.4% | 41,634 mi |
| 2018 | 16,179 | 15.2% | 50,733 mi |
| 2017 | 12,609 | 17.4% | 60,024 mi |
| 2016 | 10,476 | 19.5% | 69,627 mi |
Most common reasons for failure
- Tyre tread depth not in accordance with the requirements33.9%
- A tyre seriously damaged26.1%
- a brake lining or pad worn below 1.5mm16.8%
- Brake disc or drum excessively weakened, insecure or fractured12.0%
- A suspension joint dust cover missing or no longer prevents the ingress of dirt etc11.3%
Figures cover every Mercedes-Benz GLA tested in the DVSA dataset, not this specific car. Check a registration for the actual history of one vehicle.
Mercedes-Benz GLA official figures
Median across 14 variants on sale, diesel, electricity / petrol, petrol, petrol electric.
- Combined economy
- 41.7 mpg
- WLTP median across variants
- CO2 emissions
- 161.5 g/km
- Sets the first-year tax rate
- Electric range
- 43 miles
- Manufacturer WLTP figure
Official figures for new cars. Real economy varies with driving, load and conditions.
Frequently asked questions
What are common issues with the Mercedes-Benz GLA?
Common issues include electrical faults, problems with the air conditioning, and engine management system failures.
Which model years are the most reliable?
The 2018 and 2019 models tend to have better reliability ratings compared to earlier versions.
How does the GLA perform in MOT tests?
The GLA has a mixed MOT pass rate, with some years performing better than others.
Is the GLA worth buying used?
Yes, but it is advisable to check the service history and any common faults beforehand.
Sources
- DVSA anonymised MOT tests and results (Open Government Licence v3.0)
- VCA new car fuel consumption and emissions data (Open Government Licence v3.0)
- DVSA vehicle safety recalls (Open Government Licence v3.0)