2010 Mercury Grand Marquis

2010 Mercury Grand Marquis

The 2010 Mercury Grand Marquis was a full-size sedan that was powered by a standard 4.6-liter V8 engine, producing 224 horsepower and 280 lb-ft of torque. It was also available with an optional 5.4-liter V8 engine, producing 302 horsepower and 364 lb-ft of torque. Both engines were mated to a 6-speed automatic transmission.

The Grand Marquis was known for its spacious interior, comfortable ride, and affordable price point. However, it was criticized for its uninspired design, lack of features, and poor fuel economy.

Engine

4.6-liter V8

• Intake Manifold Gasket Failure
  • Description/Symptoms: Coolant leaks, engine misfires, rough idle
  • Solution: Replace intake manifold gaskets
  • Estimated Cost to Fix: $300 - $500
• Valve Cover Gasket Leaks
  • Description/Symptoms: Oil leaks from valve covers
  • Solution: Replace valve cover gaskets
  • Estimated Cost to Fix: $200 - $300
• Timing Chain Failure
  • Description/Symptoms: Engine rattling, loss of power, check engine light
  • Solution: Replace timing chain and tensioners
  • Estimated Cost to Fix: $1,000 - $1,500
• Spark Plug Failure
  • Description/Symptoms: Misfires, rough idle, reduced fuel economy
  • Solution: Replace spark plugs
  • Estimated Cost to Fix: $100 - $200

5.4-liter V8

• Cam Phaser Failure
  • Description/Symptoms: Engine ticking, loss of power, check engine light
  • Solution: Replace cam phasers
  • Estimated Cost to Fix: $1,500 - $2,000
• Oil Pan Leaking
  • Description/Symptoms: Oil leaks from oil pan
  • Solution: Replace oil pan gasket
  • Estimated Cost to Fix: $300 - $500
• Water Pump Failure
  • Description/Symptoms: Coolant leaks, overheating
  • Solution: Replace water pump
  • Estimated Cost to Fix: $500 - $700

Transmission

• Transmission Slipping
  • Description/Symptoms: Difficulty shifting, loss of power, check engine light
  • Solution: Replace transmission
  • Estimated Cost to Fix: $2,000 - $3,000+
• Transmission Fluid Leaks
  • Description/Symptoms: Leaks from transmission pan or lines
  • Solution: Replace leaking parts
  • Estimated Cost to Fix: $200 - $500

Suspension

• Front Lower Control Arm Bushings Failing
  • Description/Symptoms: Clunking noise, loose steering, uneven tire wear
  • Solution: Replace control arm bushings
  • Estimated Cost to Fix: $200 - $400

Electrical

• Battery Drain
  • Description/Symptoms: Battery dies prematurely
  • Solution: Replace battery or faulty alternator
  • Estimated Cost to Fix: $100 - $500
• Electrical Shorts
  • Description/Symptoms: Blown fuses, malfunctioning electrical components
  • Solution: Repair or replace faulty wiring
  • Estimated Cost to Fix: $50 - $500+
• Headlight Switch Failure
  • Description/Symptoms: Headlights not working
  • Solution: Replace headlight switch
  • Estimated Cost to Fix: $100 - $200

Exterior

• Door Handle Breakage
  • Description/Symptoms: Door handles break off
  • Solution: Replace door handles
  • Estimated Cost to Fix: $100 - $200

Interior

• Heater Core Failure
  • Description/Symptoms: No heat from vents, fogging windows
  • Solution: Replace heater core
  • Estimated Cost to Fix: $500 - $700
• Rear Defroster Failure
  • Description/Symptoms: No heat from rear defroster
  • Solution: Replace rear defroster element
  • Estimated Cost to Fix: $100 - $200
• Instrument Panel Lights Not Working
  • Description/Symptoms: Gauges or other panel lights not illuminating
  • Solution: Replace faulty bulbs or circuits
  • Estimated Cost to Fix: $50 - $200

Summary

The 2010 Mercury Grand Marquis had a number of common issues, particularly with its engine and transmission. Some issues, such as intake manifold gasket failure, were relatively minor and inexpensive to repair. However, other issues, such as timing chain failure and transmission slipping, could be more severe and costly to fix. Overall, the Grand Marquis had a higher-than-average number of reported issues for its age and mileage, which could potentially make it a risky purchase.