Mercedes EQA / EQB engine: faults and reliability

• EQA 250, 300 4MATIC and 350 4MATIC, 69.7 kWh (2021-present)

  since 2021 · 190–292 hp

  With caution

  The battery recalls (2025 and 2026) cover EQAs built between 2021 and July 2024 without distinguishing versions: check the chassis number and which measure was applied.^[1][2][3]

• EQA 250+, 73.9 kWh, 190 hp (2022-present)

  since 2022 · 190 hp

  With caution

  According to electrive, this is the version affected by the 2026 battery replacement; until it is done, Mercedes limits charging to 80%.^[3][6]

Buy: No known serious faults, or they have already been corrected, in this version. With caution: Worth buying if something specific is verified: history, a replaced part or a completed campaign. Avoid: High risk of a serious fault that is hard to check for or prevent.

1. 1Critical severityFrequency: OccasionalTraction batteryInternal short circuit in the high-voltage battery: fire risk, software update and battery replacementYes: Mercedes has launched two recalls over a possible internal short circuit in a battery cell of the EQA (and EQB), with a risk of fire. The 2025 one updated the battery software; the 2026 one plans to replace the battery. In the meantime, Mercedes recommends not charging above 80% and parking outdoors.
2. 2Critical severityFrequency: RarePower electronicsDisplaced pyrofuse housing: possible pyrotechnic fuse failure and loss of powerIn 2024 Mercedes recalled 5,750 vehicles, including the EQA and EQB, built between 18 June and 18 July 2024: the pyrofuse housing may shift and damage cables, and the pyrofuse could fail to operate in a crash or cause a high-voltage fault with a sudden loss of power.

Severity colours: low, medium, high, critical. How we rate them

Manufacturer

Mercedes-Benz

Family

EQA / EQB (BR 243)

Type

Electrical

Engine

Síncrono de imanes permanentes (según Wikipedia); segundo motor en las versiones 4MATIC

Battery

69–74 kWh

Power

190–292 hp

Peak torque

520 Nm

Production

since 2021

Makes

Mercedes-Benz

Technical data^[5]

1. since 2021

   EQA 250, 300 4MATIC and 350 4MATIC, 69.7 kWh (2021-present)

   69.7 kWh gross battery (66.5 usable). The 250 is front-wheel drive (190 hp); the 4MATICs add a second motor (228 and 292 hp, up to 520 N·m). Wikipedia attributes a permanent-magnet synchronous motor to these EQAs, although its general description is contradictory.^[5]

2. since 2022

   EQA 250+, 73.9 kWh, 190 hp (2022-present)

   Larger battery, 73.9 kWh gross (70.5 usable), with more range (up to around 563 km WLTP according to Wikipedia). It is the variant that electrive identifies as affected by the Farasis cells.^[5][6]