2009 Mercury Grand Marquis

Introduction

The 2009 Mercury Grand Marquis is a full-size sedan that offers a spacious interior, comfortable ride, and a powerful V8 engine. Engine options include a 4.6-liter V8 producing 224 horsepower and 287 lb-ft of torque, and a 5.4-liter V8 that generates 260 horsepower and 350 lb-ft of torque. Both engines are paired with a 4-speed automatic transmission. Despite its positive attributes, the Grand Marquis is known for certain issues that affect its various components.

Engine

• 4.6-liter V8
  • Spark Plug Failure
    • Description/Symptoms: Misfiring, engine hesitation, rough idle
    • Solution: Replace spark plugs
    • Estimated Cost to Fix: $150 - $250+
    • Recalls: None Found
  • Intake Manifold Gasket Leak
    • Description/Symptoms: Coolant leak, reduced engine performance
    • Solution: Replace intake manifold gasket
    • Estimated Cost to Fix: $500 - $800+
    • Recalls: None Found
• 5.4-liter V8
  • Valve Cover Gasket Leak
    • Description/Symptoms: Oil leak from under valve covers
    • Solution: Replace valve cover gaskets
    • Estimated Cost to Fix: $200 - $350+
    • Recalls: None Found
  • Cam Phaser Solenoid Failure
    • Description/Symptoms: Engine knocking, reduced power
    • Solution: Replace cam phaser solenoids
    • Estimated Cost to Fix: $600 - $1,200+
    • Recalls: None Found

Transmission

• 4-Speed Automatic
  • Shifting Issues
    • Description/Symptoms: Hard shifting, delayed shifts
    • Solution: Service transmission (fluid flush, filter replacement) or rebuild transmission
    • Estimated Cost to Fix: $250 - $2,500+
    • Recalls: None Found
  • Transmission Line Leak
    • Description/Symptoms: Transmission fluid leak
    • Solution: Replace transmission line
    • Estimated Cost to Fix: $200 - $500+
    • Recalls: None Found

Suspension

• Strut Failure
  • Description/Symptoms: Noisy suspension, reduced handling
  • Solution: Replace struts
  • Estimated Cost to Fix: $800 - $1,500+
  • Recalls: None Found
• Coil Spring Breakage
  • Description/Symptoms: Sagging suspension, rough ride
  • Solution: Replace coil springs
  • Estimated Cost to Fix: $350 - $800+
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: Battery dies quickly after parking
  • Solution: Identify and repair parasitic power drain
  • Estimated Cost to Fix: Varies depending on the cause
  • Recalls: None Found
• Alternator Failure
  • Description/Symptoms: Dimming headlights, electrical problems
  • Solution: Replace alternator
  • Estimated Cost to Fix: $500 - $1,000+
  • Recalls: None Found

Exterior

• Rust
  • Description/Symptoms: Body panel rust
  • Solution: Repair or replace rusted body panels
  • Estimated Cost to Fix: Varies depending on the extent of damage
  • Recalls: None Found

Interior

• Door Panel Trim Peeling
  • Description/Symptoms: Trim on door panels peeling or falling off
  • Solution: Replace door panel trim
  • Estimated Cost to Fix: $150 - $300+
  • Recalls: None Found
• Dashboard Cracking
  • Description/Symptoms: Cracks in dashboard material
  • Solution: Replace dashboard
  • Estimated Cost to Fix: $500 - $1,500+
  • Recalls: None Found

Summary

The 2009 Mercury Grand Marquis has a number of known issues affecting various components. While some issues are relatively minor and inexpensive to fix, others can be more severe and costly to repair. It is important for owners to be aware of these potential problems and to take steps to address them as needed to maintain the vehicle’s reliability and performance.