2001 Mercedes-Benz ML55 AMG

The 2001 Mercedes-Benz ML55 AMG is a performance SUV that delivers a powerful driving experience. It came equipped with a 5.4L V8 engine producing 342 horsepower and 376 lb-ft of torque. While offering impressive performance and a luxurious interior for its time, the ML55 AMG is not without its potential issues. Owners often appreciate the vehicle’s robust engine and distinctive AMG styling but may encounter challenges related to its age and complexity, including maintenance costs and component failures. Common complaints revolve around electrical issues, suspension problems, and the higher cost of maintaining a performance vehicle.

Engine

5.4L M113 V8

• Oil Leaks
  • Description/Symptoms: Oil leaks can occur from various locations, including valve cover gaskets, oil pan gasket, and rear main seal. Symptoms include visible oil leaks, oil consumption, and burning oil smell.
  • Solution: Replace the leaking gasket or seal.
  • Estimated Cost to Fix: $150 - $1200+, depending on the location of the leak.
  • Recalls: None Found
• Mass Air Flow (MAF) Sensor Failure
  • Description/Symptoms: Rough idling, poor acceleration, decreased fuel economy, and a check engine light.
  • Solution: Replace the faulty MAF sensor.
  • Estimated Cost to Fix: $200 - $400+
  • Recalls: None Found
• Crank Position Sensor Failure
  • Description/Symptoms: Engine stalling, especially when hot, or difficulty starting.
  • Solution: Replace the crankshaft position sensor.
  • Estimated Cost to Fix: $150 - $300+
  • Recalls: None Found

Transmission

722.6 5-Speed Automatic

• Valve Body Issues
  • Description/Symptoms: Hard shifting, slipping between gears, delayed engagement, or failure to shift.
  • Solution: Replacement of the valve body.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found
• Torque Converter Failure
  • Description/Symptoms: Shuddering during acceleration, unusual noises, or complete transmission failure.
  • Solution: Replace the torque converter.
  • Estimated Cost to Fix: $1000 - $2500+
  • Recalls: None Found

Suspension

• Air Suspension Failure (Rear)
  • Description/Symptoms: Rear of the vehicle sagging, failure to maintain ride height, compressor running constantly, suspension error messages.
  • Solution: Replace the faulty air springs.
  • Estimated Cost to Fix: $600-$1500+ per spring depending on if OEM or aftermarket parts are used.
  • Recalls: None Found
• Ball Joint Failure
  • Description/Symptoms: Clunking or popping noises when turning or going over bumps, uneven tire wear, and loose steering.
  • Solution: Replacing worn ball joints.
  • Estimated Cost to Fix: $300 - $800 per corner.
  • Recalls: None Found

Electrical

• Instrument Cluster Pixel Loss
  • Description/Symptoms: Pixels disappearing from the LCD displays in the instrument cluster, making it difficult to read information.
  • Solution: Repair or replacement of the instrument cluster.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found
• Window Regulator Failure
  • Description/Symptoms: Windows not operating properly, making grinding noises, or falling into the door.
  • Solution: Replace the faulty window regulator.
  • Estimated Cost to Fix: $250 - $500+
  • Recalls: None Found
• Sunroof Issues
  • Description/Symptoms: Sunroof motor failure, track misalignment, or water leaks.
  • Solution: Repair or replace the sunroof motor or track, and address any leaks.
  • Estimated Cost to Fix: $200 - $1000+
  • Recalls: None Found

Exterior

• Rust
  • Description/Symptoms: Rust formation on the rocker panels, door sills, and around the wheel wells.
  • Solution: Rust repair or panel replacement, followed by repainting.
  • Estimated Cost to Fix: $500 - $3000+, depending on the severity.
  • Recalls: None Found

Interior

• Center Console Cup Holder Failure
  • Description/Symptoms: Failure of the retracting mechanism of the cup holder
  • Solution: Replace the center console cup holder assembly
  • Estimated Cost to Fix: $50-$150
  • Recalls: None Found

Summary The 2001 Mercedes-Benz ML55 AMG, while offering a compelling blend of performance and luxury, is prone to several age-related issues. Engine oil leaks, transmission valve body problems, and suspension failures are common and can lead to significant repair costs. Electrical issues like pixel loss in the instrument cluster and window regulator failures are also frequent. Rust, especially in areas prone to corrosion, can further add to the maintenance burden. Owners should be prepared for potentially high maintenance costs associated with keeping this performance SUV in good running condition. The overall severity of these issues ranges from moderate to severe, with repair costs varying widely depending on the specific problem.