Common problems · 2012–18
G63 AMG (W463) problems: 8 things to check
The problems owners and specialists flag most on the Mercedes-Benz G 63 AMG, the repairs they end up doing and what those cost, plus the years and recalls to watch. Sourced, not scraped.
G63 AMG (W463) problems to check before you buy
- Is it really a G 63?Many G 550s have been fitted with AMG bumpers, grilles and badges. US G 63 VINs from Bring a Trailer listings begin WDCYC7DF (2013–2016) and WDCYC7DH (2018). A same-era G 550 reads WDCYC3HF. Check the VIN and data card, not the bodywork.
- Recall paperworkMake sure NHTSA 17V250 (steering coupling, 2013–2016) has been done. On 2016–17 trucks, also check 17V713 (ESP with DISTRONIC PLUS). Run the VIN through NHTSA's recall lookup before you hand over money.
- Oil consumption and misfiresAsk how much oil it uses between services and scan for stored codes. The M157 can suffer cylinder scoring at higher mileage. Misfires are often plugs, coils or oil-soaked cam-magnet connectors, but persistent misfires or consumption justify a borescope before purchase.
- Coolant around the turbosLook for coolant crust or a sweet smell around the turbos and the lines that feed them, and check both coolant reservoirs. MBWorld owners report cracked turbo coolant lines, and a pressure test is cheap.
- Oil at the cam magnetsUnplug a camshaft-adjuster magnet connector. If there's oil inside, it is wicking into the harness, and the magnets need replacing with sacrificial pigtails fitted.
- Seals under the truckCheck for gear oil on the inside of the front wheels and on the big AMG calipers (front axle seals), at the transfer-case outputs and at the pinion seals. An MBWorld member says pinion seal leaks are 'very common around 60k–80k'.
- Test all three lockersEngage centre, rear and front in order on loose ground and watch the indicators. A truck that has only ever been driven on pavement can have lockers that don't engage.
- Rust and drainsCheck the tailgate's lower edge, door bottoms, sills, rear frame tubes and spring mounts. A G 63 rusts like any other G, and 20-inch wheels don't stop road salt.
The repairs G63 AMG (W463) owners end up doing
| REPAIR | SYMPTOMS | DIFFICULTY | TIME | COST |
|---|---|---|---|---|
| Spark plugs & ignition coils (M157) | Misfire codes (P0300-series), rough idle, hesitation under boost. Often the plugs' age is simply unknown. | 2 / 5 | 2–3 hours | Parts plus labor |
| Camshaft-adjuster magnets leaking oil | Oil inside the four camshaft-adjuster magnet connectors at the front of the heads. Possible cam-timing codes. On neglected engines, oil wicks along the harness toward the engine computer. | 2 / 5 | 1–2 hours | Parts plus labor |
| Turbo coolant lines & water pump | Coolant loss with no obvious puddle, coolant crust or a sweet smell near the turbos, low-coolant warning, overheating. An MBWorld owner of a 2014 G 63 found a cracked coolant line at the driver-side turbo. | 4 / 5 | A day or more | Parts plus labor |
| 7G-TRONIC fluid & filter service | Harsh or delayed shifts, flare between gears, or just no service record. FCP Euro notes that the 722.9's most common failures are electronic. | 2 / 5 | 2–3 hours | Parts plus labor |
| Front axle seal leak | Gear oil on the inner front wheels or the six-piston calipers, a gear-oil smell, brakes pulling. | 3 / 5 | A day | $600–1,500 |
| Pinion & transfer-case seal leaks | Oil drips at the front of either differential or at the transfer-case outputs; oil spray on the driveshafts. | 3 / 5 | Half a day per seal | $500–1,200 (transfer-case output seal, au7o) |
| Steering damper & front-end wander | Wander, wheel shake at 55–70 mph, vague on-centre feel. au7o reports this as the most common W463 complaint. | 1 / 5 | ≈ 1 hour | $300–800 |
| Frame & body rust treatment | Bubbling at the tailgate lower edge, door bottoms and sills; scale on the rear frame tubes and spring mounts. | 3 / 5 | A weekend | $400–8,000 (au7o, depending on depth) |
Each repair links to a step-by-step guide with tools, part numbers and where to buy the parts.
Years with known problems
| YEARS | FLAG | WHAT TO KNOW |
|---|---|---|
| 2016 | Recall | Recalls 17V178 (door cable) and 17V713 (ESP with DISTRONIC PLUS) cover 2016 trucks; 17V250 (steering coupling) covers 2013–2016 |
Every G63 AMG (W463) model year, with the best ones to buy →
G63 AMG (W463) recalls and service bulletins
- Steering coupling may be under-tightened ↗ 2013–2016 · NHTSA 17V250Insufficiently tightened steering coupling can wear the steering connection; 10,832 G 550, G 63 and G 65s
- Inner door-release cable may break ↗ 2016 · NHTSA 17V178Cable can snap if the door is hard to open, e.g. after a crash (FMVSS 206)
- ESP fault with DISTRONIC PLUS engaged ↗ 2016–2017 · NHTSA 17V713An ESP malfunction while DISTRONIC PLUS is on may stop the engine reducing power; 8,043 trucks
- eCall date/time software fault ↗ 2013–2017 · NHTSA 19V787Emergency-call clock error can relay an inaccurate vehicle location
- Communication-module software (eCall location) ↗ 2017–2018 · NHTSA 21V058Communication module may fail to send the correct vehicle location in an emergency call
Check any VIN for open recalls at nhtsa.gov/recalls ↗, or see the recall tracker.
Owner questions about G63 AMG (W463) reliability
Is the M157 reliable?
It's strong when maintained, but neglect gets expensive. The well-documented jobs are spark plugs and coils, oil-leaking cam magnets, turbo coolant lines, and turbo oil feed lines on older engines. Cylinder scoring is the serious risk at higher mileage. Buy on service history and a borescope inspection, not on mileage alone.
SOURCE · FCP EURO · EURO PREMIUM PARTS · AU7OTake the printable G63 AMG (W463) inspection checklist: every check on this page plus the model-specific ones, on one sheet. Get the checklist →
Sourced from owners, specialists and factory documents; full sources are on the G63 AMG (W463) guide. Verify torque figures and procedures against the factory service manual (disclaimer).