2004 BMW Z4

The 2004 BMW Z4 marked a departure from the Z3, offering a more modern design and improved performance. It was available with several engine options, including the 2.5L inline-6 (184 hp and 175 lb-ft of torque), the 3.0i inline-6 (225 hp and 214 lb-ft of torque). Transmission options included a 5-speed manual, a 6-speed manual, and a 5-speed automatic. Owners often praise the Z4 for its sharp handling, sporty styling, and engaging driving experience. Common complaints include electrical issues, suspension problems, and higher maintenance costs associated with a German sports car.

Engine

2.5L Inline-6

• Oil Filter Housing Gasket Leak
  • Description/Symptoms: Oil leak near the oil filter housing, noticeable oil smell, low oil level, oil spots under the car.
  • Solution: Replace the oil filter housing gasket.
  • Estimated Cost to Fix: $200 - $400+
  • Recalls: None Found

3.0i Inline-6

• VANOS (Variable Valve Timing) Issues
  • Description/Symptoms: Rough idle, loss of power, engine hesitation, diagnostic trouble codes related to VANOS.
  • Solution: Replace VANOS seals, clean VANOS solenoids, or replace VANOS unit.
  • Estimated Cost to Fix: $300 - $1000+
  • Recalls: None Found
• Oil Filter Housing Gasket Leak
  • Description/Symptoms: Oil leak near the oil filter housing, noticeable oil smell, low oil level, oil spots under the car.
  • Solution: Replace the oil filter housing gasket.
  • Estimated Cost to Fix: $200 - $400+
  • Recalls: None Found

Transmission

5-Speed Automatic

• Valve Body Issues
  • Description/Symptoms: Harsh shifting, slipping between gears, failure to shift properly, transmission malfunction light.
  • Solution: Replace or rebuild valve body.
  • Estimated Cost to Fix: $800 - $2000+
  • Recalls: None Found

6-Speed Manual

• Clutch Failure
  • Description/Symptoms: Clutch slippage, difficulty shifting, clutch pedal sticking, unusual noises from the clutch area.
  • Solution: Replace the clutch disc, pressure plate, and throw-out bearing.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found

Suspension

• Control Arm Bushing Failure
  • Description/Symptoms: Clunking noises from the front suspension, wandering steering, uneven tire wear.
  • Solution: Replace the control arm bushings or the entire control arm.
  • Estimated Cost to Fix: $200 - $600+ per side.
  • Recalls: None Found
• Rear Subframe Bushing Failure
  • Description/Symptoms: Clunking or knocking noises from the rear suspension, especially when accelerating or decelerating, vague handling.
  • Solution: Replace the rear subframe bushings.
  • Estimated Cost to Fix: $500 - $1000+
  • Recalls: None Found

Electrical

• Window Regulator Failure
  • Description/Symptoms: Window not operating, slow window movement, clicking noise from the door panel.
  • Solution: Replace the window regulator.
  • Estimated Cost to Fix: $200 - $400+
  • Recalls: None Found
• Instrument Cluster Pixel Loss
  • Description/Symptoms: Pixels missing or fading on the instrument cluster display, making it difficult to read information.
  • Solution: Repair or replace the instrument cluster.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found
• Convertible Top Issues
  • Description/Symptoms: Failure of the convertible top to operate smoothly or completely, error messages related to the top mechanism.
  • Solution: Diagnose and repair the hydraulic pump, sensors, or wiring related to the convertible top.
  • Estimated Cost to Fix: $300 - $2000+ (depending on the specific issue)
  • Recalls: None Found

Exterior

• Rear Window Separation (Convertible Top)
  • Description/Symptoms: The plastic rear window of the convertible top detaches or separates from the fabric.
  • Solution: Repair or replace the convertible top.
  • Estimated Cost to Fix: $300 - $1500+ (depending on repair vs replacement)
  • Recalls: None Found

Interior

• No Issues Found

Summary

The 2004 BMW Z4 is a fun and stylish roadster, but potential buyers should be aware of some common issues. Engine and transmission problems, while not necessarily widespread, can be costly to repair. Suspension issues, particularly related to bushings, are relatively common and can affect handling. Electrical problems, such as window regulator and instrument cluster failures, are also frequently reported. The rear window separating from the convertible top is a common issue for convertibles that can be costly to repair or replace. Overall, while the Z4 offers an enjoyable driving experience, prospective owners should budget for potential repairs and maintenance. The severity and cost of issues vary, but addressing them proactively can help maintain the car’s performance and value.