KNOWN FAULTS · Mercedes-Benz

Known faults for the Mercedes-Benz Clase G (W463A).

2018–2026 · Diesel / Petrol / Electric

Sources are not verified in real time and no entry confirms that your car is affected.

3 known faults with sources

Engines: G 350 d / 400 d / 450 d (Diesel)

OM654/OM656 AdBlue, DPF and EGRAdBlue / DPF / EGR

Engine / equipment: OM654 2.0 and OM656 3.0 diesel (C, E, S, GLC, GLE, GLS, G-Class from 2016)
Period mentioned: 2016–2026
Symptoms: AdBlue or emissions warnings with a start countdown; particulate filter warning; power loss or rough idle from a dirty EGR.
Possible cause described: These are robust engines; faults concentrate in the emissions system. The AdBlue system (injector, NOx sensors and SCR catalyst) sometimes fails, especially in the cold, and the particulate filter and EGR foul if the car mostly does short trips.
Check for the garage: Read AdBlue and NOx sensor codes with Xentry, check the particulate filter regeneration history and how the car is used (short trips).
Cost cited in the source: AdBlue system: approx. €500–1,200; particulate filter: €1,000–2,000A rough figure from the original database, not an up-to-date quote.

Mileage cited in the database: from 100,000 km. This is not a maintenance interval and does not predict a failure.

Engines: G 500 / G 63 (Petrol)

Front-axle wiring harness chafing on the oil cooler (G-Class W463A)Electrical and electronic systems

Engine / equipment: Mercedes G-Class W463A (G 350 d, G 400 d, G 500/550 and AMG G 63)
Period mentioned: 2018–2021
Symptoms: ABS and ESP warning lights on; loss of anti-lock braking and stability control.
Possible cause described: The front-axle harness can rub against the oil cooler and be damaged. There were campaigns in the US (NHTSA 23V-097, 2019–2021 G 550 and AMG G 63), Japan (15,705 cars) and Hong Kong: a protective sleeve is fitted or the harness is replaced.
Check for the garage: Check by VIN at the dealer that the campaign has been done.
Cost cited in the source: Free under the recall.A rough figure from the original database, not an up-to-date quote.

Engines: G 500 / G 63 (Petrol) · G 580 eléctrico (Electric)

Applies if: US recalls for model year 2025 (the G 500 is sold there as the G 550); in Europe, ask by VIN.

Wrong ESP warning light and a front radar that can fail (2025 G-Class)Electrical and electronic systems

Engine / equipment: Model-year 2025 Mercedes-Benz G-Class (W463A), including the electric G 580
Period mentioned: 2024–2025
Symptoms: If the ESP fails, the cluster shows the wrong warning light; automatic emergency braking, lane keeping assist or Distronic stop working.
Possible cause described: Two US recalls: 25V-254 (6,247 2025 G 550, G 580 and AMG G 63), because the wrong warning light may come on when the ESP fails (the ESP control unit software is updated), and 25V-711 (a few 2025 G 580 and AMG G 63), because the circuit board of the front short-range radar sensor may fail, leaving the car without automatic emergency braking, active brake assist, lane keeping assist or Distronic (the sensor is replaced).
Check for the garage: Ask a Mercedes dealer by VIN whether both campaigns have been done.
Cost cited in the source: Free under the recall.A rough figure from the original database, not an up-to-date quote.