2007 Mercedes-Benz G55 AMG

Introduction

The 2007 Mercedes-Benz G55 AMG is a high-performance SUV featuring a supercharged 5.4-liter V8 engine producing 493 horsepower and 516 lb-ft of torque. It comes equipped with a five-speed automatic transmission. Despite its impressive performance capabilities, the G55 AMG has encountered a range of issues reported by owners.

Engine

• 5.4L V8 Supercharged
  • Supercharger Intercooler Failure: Intercooler develops leaks, causing coolant loss and overheating. Symptoms include reduced engine power and coolant warning lights. Solution requires intercooler replacement. Estimated Cost to Fix: $1,000 - $2,000+
  • Crankshaft Position Sensor Failure: Sensor malfunction leads to engine stalling, difficult starting, and rough idle. Solution requires sensor replacement. Estimated Cost to Fix: $200 - $500+
• Intake Manifold Gasket Leak: Gaskets seal cracks, leading to vacuum leaks and engine misfires. Symptoms include rough idle, reduced performance, and illuminated Check Engine light. Solution requires gasket replacement. Estimated Cost to Fix: $500 - $1,000+

Transmission

• 5-Speed Automatic
  • Transmission Valve Body Failure: Valve body malfunctions, causing erratic shifting, slipping gears, and transmission overheating. Solution requires valve body replacement or rebuild. Estimated Cost to Fix: $2,000 - $4,000+
  • Torque Converter Lockup Failure: Torque converter clutch fails to engage, leading to transmission shuddering and reduced power transfer. Solution requires torque converter replacement. Estimated Cost to Fix: $1,500 - $2,500+
  • Transmission Control Unit (TCU) Failure: TCU malfunction causes transmission shifting problems, transmission overheating, and limp mode. Solution requires TCU replacement or reprogramming. Estimated Cost to Fix: $1,000 - $2,000+

Suspension

• Front Air Suspension Compressor Failure: Compressor fails, causing suspension to drop or malfunction. Symptoms include uneven ride height, warning lights, and reduced handling. Solution requires compressor replacement. Estimated Cost to Fix: $1,500 - $2,500+
• Rear Axle Differential Failure: Differential gears wear or fail, causing noise, vibrations, and limited slip capabilities. Solution requires differential repair or replacement. Estimated Cost to Fix: $1,000 - $2,000+

Electrical

• Battery Discharge: Excessive battery drain due to faulty components or accessories. Symptoms include difficulty starting, dimmed lights, and electrical system malfunction. Solution requires electrical system diagnosis and repair. Estimated Cost to Fix: $500 - $1,500+
• Headlight Control Module Failure: Module malfunctions, leading to headlight flickering, dimming, or failure. Solution requires control module replacement. Estimated Cost to Fix: $500 - $1,000+
• Ignition Switch Failure: Switch malfunction causes difficulty starting or intermittent engine shutdown. Solution requires ignition switch replacement. Estimated Cost to Fix: $300 - $600+

Exterior

• Door Lock Actuator Failure: Actuator malfunctions, preventing doors from locking or unlocking. Solution requires actuator replacement. Estimated Cost to Fix: $300 - $600+
• Sunroof Drainage Clogs: Drains become clogged, leading to water leaks into the interior. Solution requires drain cleaning or replacement. Estimated Cost to Fix: $200 - $500+

Interior

• Navigation System Display Failure: Display screen malfunctions, causing loss of navigation and information display. Solution requires display repair or replacement. Estimated Cost to Fix: $800 - $1,500+
• Climate Control System Failure: Compressor or actuators malfunction, leading to reduced or non-functioning air conditioning or heating system. Solution requires system diagnosis and repair. Estimated Cost to Fix: $500 - $1,500+

Summary

The 2007 Mercedes-Benz G55 AMG is a capable off-road vehicle with impressive performance, but it has encountered a range of issues affecting various components. Engine and transmission problems are the most severe and expensive, while electrical and interior issues can also be costly to repair. Potential buyers should consider these issues when evaluating the reliability of this vehicle and budgeting for potential repairs.