Post
Research the Car Logo

2004 Mini Cooper

Posted
By Research the Car 5 min read

The 2004 Mini Cooper is a fun and stylish subcompact car known for its nimble handling and distinctive retro design. Engine options include a 1.6L inline-4 cylinder engine available in naturally aspirated and supercharged configurations. The base model produces 115 horsepower and 110 lb-ft of torque. The Cooper S, with its supercharger, bumps that up to 163 horsepower and 155 lb-ft of torque. Transmission options include a 5-speed manual and a CVT for the base model, and a 6-speed manual for the Cooper S. The Mini Cooper is praised for its go-kart-like handling and unique styling but is often criticized for its reliability issues and somewhat cramped rear seats.

Engine

1.6L Naturally Aspirated Inline-4

  • Coolant Leaks
    • Description/Symptoms: Coolant leaks can occur from various locations, including the thermostat housing, water pump, and radiator hoses. Common symptoms include a low coolant warning light, visible coolant leaks under the car, and engine overheating.
    • Solution: Replace the leaking component (thermostat housing, water pump, hoses, etc.). Pressure testing the cooling system can help pinpoint the source of the leak.
    • Estimated Cost to Fix: $100 - $500+ depending on the component and labor.
    • Recalls: None Found
  • Oil Leaks
    • Description/Symptoms: Oil leaks are common, especially from the valve cover gasket, oil pan gasket, and crankshaft seals. Symptoms include visible oil leaks, a burning oil smell, and low oil level.
    • Solution: Replace the leaking gasket or seal. Clean the affected area to ensure proper sealing.
    • Estimated Cost to Fix: $100 - $400+ depending on the location and labor.
    • Recalls: None Found
  • Crank Position Sensor Failure
    • Description/Symptoms: The engine may stall or fail to start, often accompanied by a check engine light. Diagnostic codes related to the crank position sensor may be present.
    • Solution: Replace the crank position sensor.
    • Estimated Cost to Fix: $80 - $200
    • Recalls: None Found

1.6L Supercharged Inline-4 (Cooper S)

  • Supercharger Failure
    • Description/Symptoms: Reduced engine power, whining or rattling noises from the supercharger, and a check engine light.
    • Solution: Rebuild or replace the supercharger.
    • Estimated Cost to Fix: $1500 - $3000+
    • Recalls: None Found
  • Intercooler Pump Failure
    • Description/Symptoms: Reduced engine power, particularly in warm weather. The intercooler pump is responsible for cooling the air entering the engine after being compressed by the supercharger.
    • Solution: Replace the intercooler pump.
    • Estimated Cost to Fix: $200 - $400
    • Recalls: None Found
  • Coolant Leaks
    • Description/Symptoms: Coolant leaks can occur from various locations, including the thermostat housing, water pump, and radiator hoses. Common symptoms include a low coolant warning light, visible coolant leaks under the car, and engine overheating.
    • Solution: Replace the leaking component (thermostat housing, water pump, hoses, etc.). Pressure testing the cooling system can help pinpoint the source of the leak.
    • Estimated Cost to Fix: $100 - $500+ depending on the component and labor.
    • Recalls: None Found

Transmission

5-Speed Manual

No Issues Found

6-Speed Manual (Cooper S)

  • Clutch Failure
    • Description/Symptoms: Slipping clutch, difficulty shifting, and a high clutch pedal engagement point.
    • Solution: Replace the clutch disc, pressure plate, and throw-out bearing. Consider replacing the flywheel as well.
    • Estimated Cost to Fix: $800 - $1500+
    • Recalls: None Found

CVT (Continuously Variable Transmission)

  • CVT Failure
    • Description/Symptoms: Jerky acceleration, slipping, inability to shift, and whining noises. The CVT is known to be problematic in this model.
    • Solution: Replacement of the CVT is often required.
    • Estimated Cost to Fix: $2500 - $5000+
    • Recalls: None Found

Suspension

  • Strut Mount Failure
    • Description/Symptoms: Clunking noises from the front suspension, particularly when going over bumps. Worn strut mounts can also affect handling and tire wear.
    • Solution: Replace the strut mounts. It’s often recommended to replace the struts and shocks at the same time.
    • Estimated Cost to Fix: $300 - $600+
    • Recalls: None Found
  • Control Arm Bushing Failure
    • Description/Symptoms: Loose steering, vibrations, and clunking noises from the front suspension.
    • Solution: Replace the control arm bushings. In some cases, it may be necessary to replace the entire control arm.
    • Estimated Cost to Fix: $200 - $500+
    • Recalls: None Found

Electrical

  • Power Window Failure
    • Description/Symptoms: Windows failing to operate, often accompanied by clicking noises.
    • Solution: Replace the window regulator or motor.
    • Estimated Cost to Fix: $200 - $400
    • Recalls: None Found
  • Central Locking System Issues
    • Description/Symptoms: Doors failing to lock or unlock with the remote or interior switch.
    • Solution: Diagnose the problem (faulty actuator, wiring issues, etc.) and replace the affected component.
    • Estimated Cost to Fix: $100 - $300+
    • Recalls: None Found

Exterior

  • Rust
    • Description/Symptoms: Rust can occur in various locations, especially around the wheel wells, door sills, and underbody.
    • Solution: Repair the rust by sanding, treating, and repainting the affected areas.
    • Estimated Cost to Fix: $200 - $1000+ depending on severity
    • Recalls: None Found

Interior

  • Odometer LCD Failure
    • Description/Symptoms: Faded or unreadable odometer display.
    • Solution: Replace the instrument cluster or repair the LCD screen.
    • Estimated Cost to Fix: $150 - $400
    • Recalls: None Found

Summary

The 2004 Mini Cooper is known for its fun driving experience, but it’s also plagued by several common issues. Engine problems, particularly coolant and oil leaks, are prevalent. The supercharged Cooper S can suffer from supercharger and intercooler pump failures. The CVT transmission is known to be unreliable and can require costly replacement. Suspension issues, such as strut mount and control arm bushing failures, are also common. Electrical problems, such as power window and central locking system issues, can also occur. Overall, prospective buyers should be aware of these potential problems and factor in the cost of repairs when considering purchasing a 2004 Mini Cooper. The severity ranges from minor inconveniences to major component failures.

Mini, Cooper
Mini Cooper 2004
This post is licensed under CC BY 4.0 by the author.