2002 Mazda Millenia

The 2002 Mazda Millenia was a mid-size luxury sedan known for its comfortable ride and distinctive styling. It came with two engine options: a 2.5L V6 producing 170 horsepower and 160 lb-ft of torque and a supercharged 2.3L Miller-cycle V6 producing 210 horsepower and 210 lb-ft of torque. Both engines were paired with a 4-speed automatic transmission. Owners generally liked the Millenia for its quiet cabin and upscale features, but some disliked its reliability issues and higher maintenance costs, especially with the Miller-cycle engine.

Engine

2.5L V6

• Oil Leaks
  • Description/Symptoms: Oil leaks are common, often originating from the valve cover gaskets, oil pan gasket, or rear main seal. Symptoms include visible oil leaks, a burning oil smell, and low oil levels.
  • Solution: Replace the leaking gasket or seal.
  • Estimated Cost to Fix: $100 - $400+
  • Recalls: None Found
• Camshaft Position Sensor Failure
  • Description/Symptoms: Engine stalling, rough running, or a check engine light with a P0340 code.
  • Solution: Replace the camshaft position sensor.
  • Estimated Cost to Fix: $80 - $200+
  • Recalls: None Found

2.3L Miller-Cycle V6

• Supercharger Failure
  • Description/Symptoms: Whining noise from the engine, loss of power, and potential engine damage if not addressed.
  • Solution: Rebuild or replace the supercharger.
  • Estimated Cost to Fix: $800 - $2,500+
  • Recalls: None Found
• Oil Leaks
  • Description/Symptoms: Similar to the 2.5L, oil leaks can occur from valve cover gaskets, oil pan gasket, or rear main seal.
  • Solution: Replace the leaking gasket or seal.
  • Estimated Cost to Fix: $100 - $400+
  • Recalls: None Found
• Miller Cycle Specific Issues
  • Description/Symptoms: The Miller Cycle engine is a unique design with specialized components, and the rarity of these components may cause issues and make repair more difficult.
  • Solution: Locate a shop with expertise on this specific engine type for diagnosis and repair.
  • Estimated Cost to Fix: Unknown.
  • Recalls: None Found

Transmission

4-Speed Automatic (Both Engines)

• Slipping or Harsh Shifting
  • Description/Symptoms: Transmission slipping between gears, delayed engagement, or harsh shifts.
  • Solution: Could be caused by low transmission fluid, a faulty valve body, or worn clutch packs. Start with a fluid flush and filter replacement. If that doesn’t solve the issue, further diagnosis and repair are needed.
  • Estimated Cost to Fix: $100 - $2,500+
  • Recalls: None Found
• Torque Converter Failure
  • Description/Symptoms: Shuddering or vibration at low speeds, especially when accelerating.
  • Solution: Replace the torque converter.
  • Estimated Cost to Fix: $500 - $1,500+
  • Recalls: None Found

Suspension

• Strut Mount Failure
  • Description/Symptoms: Clunking noises from the front suspension, especially when going over bumps.
  • Solution: Replace the strut mounts.
  • Estimated Cost to Fix: $200 - $500+
  • Recalls: None Found
• Control Arm Bushing Wear
  • Description/Symptoms: Loose steering, wandering on the road, and clunking noises.
  • Solution: Replace the worn control arm bushings or the entire control arm.
  • Estimated Cost to Fix: $150 - $600+
  • Recalls: None Found

Electrical

• Power Window Regulator Failure
  • Description/Symptoms: Power windows failing to operate, or operating intermittently.
  • Solution: Replace the faulty window regulator.
  • Estimated Cost to Fix: $150 - $400+
  • Recalls: None Found
• Alternator Failure
  • Description/Symptoms: Dimming headlights, a dead battery, and a check engine light.
  • Solution: Replace the alternator.
  • Estimated Cost to Fix: $200 - $500+
  • Recalls: None Found

Exterior

• Antenna Mast Motor Failure
  • Description/Symptoms: Antenna no longer retracts or extends, or makes a grinding noise.
  • Solution: Replace antenna assembly
  • Estimated Cost to Fix: $50 - $250+
  • Recalls: None Found

Interior

• Climate Control Issues
  • Description/Symptoms: The climate control system blowing hot air only, cold air only, or not responding to temperature adjustments.
  • Solution: Could be caused by a faulty blend door actuator or a malfunctioning climate control module. Diagnose the specific issue and replace the faulty component.
  • Estimated Cost to Fix: $100 - $500+
  • Recalls: None Found

Summary: The 2002 Mazda Millenia, while offering a comfortable and somewhat luxurious driving experience, is prone to several issues. Engine oil leaks, particularly in both engine options, and transmission problems are relatively common and can be costly to repair. The 2.3L Miller-cycle engine has specific supercharger related issues that also can be costly. Suspension and electrical problems, while less severe, contribute to the overall maintenance burden. Potential buyers should be aware of these potential issues and factor in higher maintenance costs when considering purchasing this vehicle.