2003 Mercedes Benz Ml55 Amg Problems & Reliability

If you’re a car enthusiast or just someone who appreciates the blend of luxury and performance, the 2003 Mercedes Benz ML55 AMG might have caught your eye. This SUV, with its powerful V8 engine and sleek design, was a standout in its time, offering a unique combination of speed, comfort, and prestige. However, like any vehicle that’s been around for a couple of decades, it comes with its own set of quirks and issues. In this blog post, we’ll dive into some of the common problems that owners have encountered with the 2003 ML55 AMG, as well as discuss its overall reliability. Whether you’re considering buying one or just curious about its performance over the years, we’ve got you covered. While the ML55 AMG was a trailblazer in the early 2000s, it’s important to be aware of the potential challenges that come with owning a vehicle of this age. From electrical gremlins to transmission woes, we’ll explore the typical issues that have been reported by owners. But it’s not all doom and gloom—many ML55 AMG owners have enjoyed years of reliable service with proper maintenance and care. We’ll also touch on the aspects that have stood the test of time, making this SUV a beloved choice for those who appreciate its unique charm. So, buckle up as we take a closer look at what makes the 2003 Mercedes Benz ML55 AMG both a classic and a conundrum.
Body Components

Parts Assessed:

Windows, power locks, manual locks, doors, trunk, tailgate, mirrors, power and manual seat controls, seat belts, sunroof, convertible top, glass defects.

Reported Problems:

N/A

Analysis:

No major problem has been reported

Parts Assessed

Brake pads, brake rotors, brake calipers, anti-lock braking system (ABS), brake lines, brake master cylinder, brake booster, parking brake, brake sensors, regenerative braking system (if applicable).

Reported Problems:

  • Brake Light Switch Failure May Cause ESP/BAS Warning Lights

Analysis:

The 2003 Mercedes Benz ML55 AMG has a known issue with the brake light switch, which can lead to the ESP/BAS warning lights coming on. While this problem can be a bit annoying, it’s generally not a major mechanical failure and can be fixed relatively easily. Overall, the ML55 AMG is a solid performer, but like any older vehicle, it might have a few quirks that need attention.

Parts Assessed

Air conditioning compressor, AC condenser, AC evaporator, heater core, blower motor, automatic climate control system, refrigerant leaks, HVAC electrical components, temperature sensors, ventilation system.

Reported Problems:

  • Electrical switches in door latches may fail

Analysis:

The 2003 Mercedes Benz ML55 AMG has some issues with the electrical switches in the door latches, which can be a bit of a hassle. This problem might lead to doors not locking or unlocking properly, affecting the overall convenience and security of the vehicle. While its not a deal-breaker, its something to keep an eye on if youre considering this model.

Parts Assessed

CV joints, driveshaft, axles, differential, limited-slip differential (if applicable), traction control system, electronic stability control (ESC), four-wheel-drive (4WD) components, all-wheel-drive (AWD) components, transfer case, driveline vibration.

Reported Problems:

  • Motor Mounts Fail and Cause Vibration in Body

Analysis:

The 2003 Mercedes Benz ML55 AMG has some issues with motor mounts failing, which can lead to noticeable vibrations in the body. This problem can affect the overall driving experience and might require attention to maintain the vehicle’s smooth performance. While it’s a known issue, regular maintenance and timely repairs can help keep the SUV running reliably.

Parts Assessed

Infotainment system, GPS navigation, Bluetooth connectivity, touchscreen display, phone pairing, backup camera, rear entertainment system, head-up display, instrument cluster, digital gauges.

Reported Problems:

  • Engine Performance Problems Due to Crankshaft Position Sensor Failure

Analysis:

The 2003 Mercedes Benz ML55 AMG is known to have some engine performance issues, particularly due to crankshaft position sensor failure. This problem can lead to symptoms like stalling, difficulty starting, or poor acceleration, which can be pretty frustrating. While it’s a solid vehicle overall, this specific issue can affect its reliability if not addressed promptly.

Parts Assessed

Radiator, radiator hoses, cooling fan, water pump, thermostat, antifreeze leaks, engine coolant reservoir, overheating prevention system, intercooler (if applicable).

Reported Problems:

  • Welds May Crack on Front Catalytic Converter

Analysis:

The 2003 Mercedes Benz ML55 AMG has a known issue where the welds on the front catalytic converter may crack. This problem can lead to exhaust leaks and potentially affect the vehicle’s performance and emissions. While it’s a specific issue, it’s something to keep an eye on if you’re considering this model for its overall reliability.

Parts Assessed

Alternator, battery, ignition switch, ignition coil, spark plugs, ignition wires, engine control module (ECM), electronic ignition system, auto stop/start function, battery cables, engine wiring harness, fuse box, relays, starter motor.

Reported Problems:

  • AC System Leaks/Bad Temperature Sensors May Cause Poor Cooling

Analysis:

The 2003 Mercedes Benz ML55 AMG can sometimes face issues with its AC system, particularly with leaks or faulty temperature sensors, which might lead to poor cooling performance. While these problems can be a hassle, they are not uncommon in older vehicles and can usually be addressed with proper maintenance and timely repairs. Overall, keeping an eye on the AC system’s condition can help maintain the vehicle’s reliability and comfort.

Parts Assessed

Engine rebuilds, cylinder head, head gasket, timing chain, timing belt, camshaft, crankshaft, connecting rods, turbocharger or supercharger (if applicable), valve train, piston rings, oil control system, engine knocking, engine misfires.

Reported Problems:

  • Oil May Leak From PCV Vent Housings and Inspection Plates

Analysis:

The 2003 Mercedes Benz ML55 AMG has a known issue where oil may leak from the PCV vent housings and inspection plates. This problem can lead to messy oil leaks and potential engine performance issues if not addressed promptly. While it’s a notable concern, regular maintenance and timely repairs can help maintain the overall reliability of the vehicle.

Parts Assessed

Muffler, catalytic converter, exhaust manifold, heat shields, exhaust pipes, oxygen (O₂) sensors, resonator, exhaust leaks, emissions control system.

Reported Problems:

  • Power Window Main Switch May Fail

Analysis:

The 2003 Mercedes Benz ML55 AMG is a solid performer, but one common issue that pops up is the power window main switch potentially failing. While this can be a bit annoying, it’s not a deal-breaker for most owners who appreciate the vehicle’s overall performance and luxury. Just keep an eye on it, and you should be good to go!

Parts Assessed

Fuel pump, fuel injectors, fuel rail, fuel pressure regulator, throttle body, fuel gauge sensor, evaporative emissions system, EGR (exhaust gas recirculation) valve, charcoal canister, fuel filter, fuel tank, vapor leaks.

Reported Problems:

  • All Activity Module May Cause Multiple Electrical Malfunctions

Analysis:

The 2003 Mercedes Benz ML55 AMG seems to have some issues with its All Activity Module, which can lead to multiple electrical malfunctions. This could be a bit of a headache if you’re considering this model, as electrical problems can be tricky and costly to fix. Overall, while the ML55 AMG is a beast in terms of performance, these electrical issues might make you think twice about its reliability.

Flagship-One-Engine-Computer-In-Stock
Onboard Electronics

Parts Assessed

Cruise control, keyless entry system, push-button start, wiper motor, warning lights, power mirrors, interior lighting, exterior lighting, dashboard indicators, electronic parking brake, tire pressure monitoring system (TPMS), alarm and security system, remote engine start, heated and ventilated seats, heated steering wheel, wireless charging pad.

Reported Problems:

  • Arms for Sunroof Wind Deflector May Break

Analysis:

The 2003 Mercedes Benz ML55 AMG has a known issue where the arms for the sunroof wind deflector may break, which can be a bit of a hassle if you enjoy cruising with the sunroof open. While this problem doesn’t affect the overall performance of the vehicle, it’s something to keep in mind if you’re considering this model. Overall, the ML55 AMG is a solid ride, but like any older car, it comes with its quirks.

Parts Assessed

Dashboard rattles, squeaks, wind noise, door seals, weather stripping, water leaks, air leaks, excessive road noise, suspension noise, drivetrain noise, exhaust rattles, engine bay noises.

Reported Problems:

  • Power Steering Return Hose May Leak at Radiator Cooler Fitting

Analysis:

The 2003 Mercedes Benz ML55 AMG has a known issue with the power steering return hose potentially leaking at the radiator cooler fitting. This problem can lead to a loss of power steering fluid, which might affect the vehicle’s steering performance. While it’s a specific issue, addressing it promptly can help maintain the overall reliability of the vehicle.

Parts Assessed

Paint durability, clear coat protection, rust prevention, corrosion resistance, body panel alignment, door seals, window trim, plastic trim, metal finishes, fading, cracking, peeling.

Reported Problems:

  • Steering Rack Prone to Leaks

Analysis:

No major problem has been reported

Parts Assessed

Struts, shocks, control arms, sway bars, ball joints, tie rods, wheel bearings, power steering pump, power steering fluid leaks, electronic power steering (EPS), steering rack and pinion, steering linkage, alignment issues, torsion bars, springs, air suspension (if applicable).

Reported Problems:

  • Wire Connector on Transmission May Leak Fluid and Damage Control Module

Analysis:

The 2003 Mercedes Benz ML55 AMG has a known issue with the wire connector on the transmission, which can leak fluid and potentially damage the control module. This problem can lead to costly repairs and affect the overall reliability of the vehicle. If you’re considering this model, it’s something to keep in mind and possibly check for any previous repairs or preventative measures taken by the previous owner.

Parts Assessed

Transmission rebuild, transmission replacement, torque converter, transmission solenoids, gear selector, gear shifting, transmission control module (TCM), transmission fluid leaks, clutch (manual transmission), automatic transmission valve body, CVT (continuously variable transmission) components, dual-clutch transmission (DCT) components.

Reported Problems:

  • Release Cables For Rear Seat May Stretch/Break

Analysis:

The 2003 Mercedes Benz ML55 AMG has a known issue with the release cables for the rear seat, which may stretch or break over time. This problem can be a bit of a hassle, especially if you frequently need to fold down the rear seats for extra cargo space. While it’s not a deal-breaker, it’s something to keep in mind if you’re considering the overall reliability of this model.

Conclusion

Facebook
Twitter
LinkedIn
Picture of Flagship One

Flagship One

The world's top supplier of programmed OEM (Original Equipment Manufacturer) Powertrain Control Modules (PCM), Engine Control Modules (ECM), Injection Control Modules (IDM), Body Control Modules (BCM), Transmission Control Modules (TCM), Engine Control Units and all other car control units. With over a decade in the business, we are the most reliable source when it comes to programming services for replacement engine control modules.

What Customers Think About Us