2007 Mercedes-Benz G55 AMG

The 2007 Mercedes-Benz G55 AMG is a high-performance SUV known for its ruggedness, luxurious features, and powerful engine. The 2007 G55 AMG came with a 5.4L Supercharged V8 engine producing 493 horsepower and 516 lb-ft of torque paired with a 5-speed automatic transmission. Owners generally appreciate the G55 AMG for its distinctive styling, off-road capability, and powerful engine. Common dislikes include its poor fuel economy and high maintenance costs.

Engine

5.4L Supercharged V8

• Supercharger Issues
  • Description/Symptoms: The supercharger can experience failures such as a whining noise, reduced boost, and overall performance decline. This can be caused by worn bearings or a failing clutch.
  • Solution: Replace the supercharger or rebuild it. Replacing the supercharger is the most common route.
  • Estimated Cost to Fix: $4,000 - $8,000+
• Intercooler Pump Failure
  • Description/Symptoms: Overheating issues, especially during spirited driving or in hot weather, can be caused by a failing intercooler pump. This pump circulates coolant through the supercharger’s intercooler.
  • Solution: Replace the intercooler pump.
  • Estimated Cost to Fix: $500 - $1,000+
• Valve Cover Gasket Leaks
  • Description/Symptoms: Oil leaks from the valve cover gaskets are common on older G55s. Look for oil pooling around the valve covers or a burning smell.
  • Solution: Replace the valve cover gaskets.
  • Estimated Cost to Fix: $300 - $600+

Transmission

5-Speed Automatic

• Transmission Conductor Plate Failure
  • Description/Symptoms: Erratic shifting, getting stuck in gear, or failure to shift. A faulty conductor plate within the transmission can cause these issues.
  • Solution: Replace the transmission conductor plate and often the electrical connector.
  • Estimated Cost to Fix: $800 - $1,500+
• Torque Converter Failure
  • Description/Symptoms: Shuddering during acceleration, slipping between gears, or complete transmission failure.
  • Solution: Replace the torque converter.
  • Estimated Cost to Fix: $1,500 - $3,000+
• Valve Body Issues
  • Description/Symptoms: Hard or delayed shifting. Can be caused by worn valves or solenoids within the valve body.
  • Solution: Replace or rebuild the valve body.
  • Estimated Cost to Fix: $1,000 - $2,500+

Suspension

• Air Suspension Failure
  • Description/Symptoms: The G55 AMG utilizes an air suspension system, which can be prone to leaks, compressor failure, and sensor malfunctions. This can result in the vehicle sitting unevenly, failing to raise or lower, or displaying warning lights.
  • Solution: Identify the source of the leak (air strut, air line, valve block) or replace the compressor or sensors.
  • Estimated Cost to Fix: $800 - $2,000+ per strut, $500 - $1,000+ for compressor.
• Leveling Sensor Malfunction
  • Description/Symptoms: The air suspension can exhibit strange behavior, such as failing to level properly or displaying incorrect ride height. This can be caused by faulty ride height sensors.
  • Solution: Replace the ride height sensor(s).
  • Estimated Cost to Fix: $300 - $700+ per sensor

Electrical

• Battery Drain Issues
  • Description/Symptoms: The vehicle can experience unexplained battery drain, leading to a dead battery. This can be caused by a variety of factors, including faulty modules, parasitic draws, or a failing alternator.
  • Solution: Diagnose the source of the battery drain using a multimeter and electrical diagnostics. Replace the faulty component.
  • Estimated Cost to Fix: Varies greatly depending on the source, ranging from $100 to $1,000+
• Window Regulator Failure
  • Description/Symptoms: Power windows failing to operate correctly.
  • Solution: Replace the window regulator.
  • Estimated Cost to Fix: $300-$600
• Fuse Box Corrosion
  • Description/Symptoms: Erratic electrical behavior, starting issues. Corrosion can build up in the fuse box, causing connectivity problems.
  • Solution: Clean the fuse box, replace corroded fuses and relays, or replace the fuse box if the damage is severe.
  • Estimated Cost to Fix: $100 - $800+

Exterior

• Rust
  • Description/Symptoms: Rust is a common issue, especially in areas with road salt. Check around the wheel wells, door bottoms, and undercarriage.
  • Solution: Treat and repair the rust.
  • Estimated Cost to Fix: $500 - $5,000+ (depending on severity)
• Door Lock Actuator Failure
  • Description/Symptoms: Doors failing to lock or unlock properly.
  • Solution: Replace the door lock actuator.
  • Estimated Cost to Fix: $300 - $600+ per door

Interior

• Headliner Sagging
  • Description/Symptoms: The headliner material detaches and sags.
  • Solution: Replace the headliner.
  • Estimated Cost to Fix: $800 - $1,500+
• Sunroof Issues
  • Description/Symptoms: Sunroof failing to open or close properly, or leaking.
  • Solution: Repair or replace the sunroof mechanism or seals.
  • Estimated Cost to Fix: $500 - $2,000+

Recalls:

• None Found

Summary:

The 2007 Mercedes-Benz G55 AMG is a powerful and capable vehicle but can be expensive to maintain. Engine and transmission issues, particularly related to the supercharger, air suspension, and electrical components, are common concerns. Repair costs can range from a few hundred dollars for minor issues to several thousand for major repairs such as supercharger or transmission replacement. Potential buyers should be aware of these potential issues and factor them into the overall cost of ownership.