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Mercedes-Benz EQB X243 (2022-present) reliability

At a glance

Mercedes-Benz EQB X243 built around 2022: more dangerous faults than average

Testers find a dangerous fault on Mercedes-Benz EQB X243 models built around 2022 more often than on similar cars the same age. Look closely at the tyres on any car you view.

Looking at a Mercedes-Benz EQB X243?

Enter its number plate to see its full MOT history, risk rating and running costs.

Key figure

6% of MOT tests on Mercedes-Benz EQB X243 models built around 2022 found a fault the tester marked as dangerous, against 3% for similar cars the same age.

Most common issue

The most common MOT issue on Mercedes-Benz EQB X243 models built around 2022 involves the tyres.

Mercedes-Benz EQB X243
No reliability rating: too close to call between ratings2022-presentSUVELECTRICITY

Based on 1,903 tests of EQB models registered 2022+.

About 1 in 7 electricity EQB cars registered in 2022 (15.4%) failed their first MOT.

Based on 2,339 first MOTs (DVSA MOT results, 2025).

About 1 in 50 EQB X243 MOTs (1.8%) failed and still hadn't passed 3 days later. That's for cars built around 2022 (3 years old), all fuels combined.

Based on 1,903 tests (DVSA MOT results, 2025). A fail that passed a retest within 3 days, even the same day, isn't counted. Nor is a fail with no later MOT on record.

About 1 in 15 EQB X243 MOTs (6.1%) found at least one dangerous defect. These are cars built around 2022 (3 years old).

Based on 1,903 tests (DVSA MOT results, 2025). Dangerous is the most serious grade an MOT gives: a direct risk to road safety.

X243 fail rate by age

Below typicalAbove typicalHigh (28% or more)Highest fail rateUK average for cars this age
Age / builtFail rateMOT tests
3 yearsbuilt around 2022
1,90313.1%

Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Build years are worked out from age, so they are approximate. Tests counted are 2025 MOTs. Highest fail rate at 3 years old.

How the EQB X243 compares

At each age below, see how the EQB X243 holds up against other cars the same age. The averages combine all fuel types.

Based on 63,174 tests across 19 Mercedes-Benz models, built around 2022 (3 years old).

Below typicalAbove typicalHigh (28% or more)Highest fail rateMercedes-Benz average
Age / builtFail rateMOT tests
3 yearsbuilt around 2022
1,90313.1%

Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Build years are worked out from age, so they are approximate. Tests counted are 2025 MOTs.

What to check before viewing

The model's most common MOT issues, turned into things you can ask about or look for.

Independent inspection

High priority

Have an independent specialist inspect the car before you commit.

Tyres

Worth checking

Check tread depth across the full width on all four; uneven wear suggests alignment or suspension issues.

Suspension bushes and joints

Worth checking

Listen for knocks over speed bumps and ask about recent control-arm or anti-roll-bar work.

Vehicle-specific check

Worth checking

Check the car’s number plate on MOT Wise to see its own MOT history and any recalls for its build years.

Windscreen

If you have time

Inspect for chips and cracks in the wiper sweep area (Zone A) — these will fail an MOT.

Other SUVs to compare

Other SUVs, with each one's figures taken at the same age as the EQB X243.

  1. 1

    Honda HR-V

    Same body type, tested at the same age

    Fail rate
    4.9%
    Fail, no pass in 3 days
    0.3%
    Dangerous
    1%
    Still registered at 10 years
    97%

    Lower fail rate: 4.9%, against 13.1% for the Mercedes-Benz EQB X243, both built around 2022.

    4,493 MOT tests on cars built around 2022

  2. 2

    Lexus UX

    Same body type, tested at the same age

    Fail rate
    4.9%
    Fail, no pass in 3 days
    0.6%
    Dangerous
    1.2%

    Lower fail rate: 4.9%, against 13.1% for the Mercedes-Benz EQB X243, both built around 2022.

    4,866 MOT tests on cars built around 2022

  3. 3

    Lexus RX

    Same body type, tested at the same age

    Fail rate
    4.3%
    Fail, no pass in 3 days
    0.6%
    Dangerous
    1.5%
    Still registered at 10 years
    90.4%

    Lower fail rate: 4.3%, against 13.1% for the Mercedes-Benz EQB X243, both built around 2022.

    2,386 MOT tests on cars built around 2022

  4. 4

    Lexus NX

    Same body type, tested at the same age

    Fail rate
    5.1%
    Fail, no pass in 3 days
    0.6%
    Dangerous
    1.4%
    Still registered at 10 years
    88.4%

    Lower fail rate: 5.1%, against 13.1% for the Mercedes-Benz EQB X243, both built around 2022.

    3,800 MOT tests on cars built around 2022

Fail rate
= the share of MOT tests that ended in a fail. Retests count as tests.
Fail, no pass in 3 days
= the share of MOT tests that failed and still hadn't passed 3 days later. A fail that passed a retest within 3 days, even the same day, isn't counted.
Dangerous
= the share of MOT tests where the tester marked a fault as dangerous. It is against the law to drive the car until it is fixed.
Still registered at 10 years
= the share of cars still registered (taxed or declared off the road) 10 years after they were first registered.

Recall context

4 recalls in all

3 of the 4 EQB X243 recalls cover cars built in these years.

  • 1 Critical
  • 2 more

Top concerns

  • SRPC2500 – update battery management system control unit software
  • SRPC2404 – backup function of steering software
  • On affected vehicles the material properties of the upper B-Pillar and the beltline trim may not meet the specifications

For the exact car, check GOV.UK's recall checker with the number plate.

X243 variants compared

EQB X243 variants built around 2022

The fail rate for each EQB X243 variant, grouped by fuel. Each row counts fails per MOT test, the same way as the main fail rate chart.

Electricity

  • EQB 350 AMG LNE PREMIUM 4MATIC14.3%789 tests
  • EQB 300 AMG LNE PREMIUM 4MATIC13.6%435 tests
  • EQB 350 AMG LINE 4MATIC11.1%306 tests
  • EQB 300 AMG LINE 4MATIC12.7%268 tests
All generations of this modelEnough data

Most common issues on Mercedes-Benz EQB models of this age

This list covers every Mercedes-Benz EQB built around 2022, whichever generation it is. We don't have a defect list for the X243 on its own.

Most common advisories and fails

In order of the share of MOT tests that recorded each one

  1. 1
    Advisory

    Tyre worn close to the legal limit or worn on the edge

    24.6%
    Advisory: 848Fail: 20 (2% of the times it was found)
  2. 2
    Advisory

    Tyre slightly damaged, cracking or perishing

    12.1%
    Advisory: 268Fail: 143 (35% of the times it was found)
  3. 3
    Advisory

    Tyre has a cut that does not reach the ply or cords

    7.3%
    Advisory: 89Fail: 118 (57% of the times it was found)
  4. 4
    Advisory

    Suspension arm pin or bush worn, but not moving too much

    4.6%
    Advisory: 98Fail: 23 (19% of the times it was found)
  5. 5
    Minor

    Windscreen damaged, but the driver can still see clearly

    3.5%
    Advisory: 0Fail: 0 (0% of the times it was found)

Based on 1,903 tests

Looking at a Mercedes-Benz EQB X243?

Enter its number plate to see its full MOT history, risk rating and running costs.

Frequently asked questions

Built around 2022 (3 years old), the Mercedes-Benz EQB X243 (2022-present) fails MOTs slightly more often than typical for this age. This is based on 1,903 3-year-old MOT tests from DVSA data. Each retest counts as a test.

*The build year is worked out from the date a car was first used on UK roads. For most cars this matches when it was registered, but imports may differ by a few months.

Data sourced from DVSA MOT History API. From 1,903 MOT tests on Mercedes-Benz EQB models first registered from 2022. These figures are a guide, not a guarantee.