2003 Mazda Miata

The 2003 Mazda Miata, part of the NB generation (1999-2005), is a beloved roadster known for its nimble handling, simple design, and engaging driving experience. This model year came with a 1.8L inline-4 engine producing approximately 142 horsepower and 125 lb-ft of torque. Transmission options include a 5-speed manual, a 6-speed manual, and a 4-speed automatic. Owners often praise the Miata for its affordability, reliability, and the joy of open-top motoring. Criticisms generally revolve around its small size, limited cargo space, and relatively basic features compared to modern cars.

Engine

1.8L Inline-4

• Valve Cover Gasket Leak
  • Description/Symptoms: Oil leak from the valve cover gasket, resulting in oil drips onto the exhaust manifold (causing a burning smell) or onto the engine block. Visible oil residue around the valve cover edges.
  • Solution: Replace the valve cover gasket.
  • Estimated Cost to Fix: $50 - $200+
  • Recalls: None Found
• Oil Leaks from Front and Rear Main Seals
  • Description/Symptoms: Oil leak from the front main seal (behind the crankshaft pulley) or rear main seal (between the engine and transmission). Visible oil drips underneath the car near the front or rear of the engine.
  • Solution: Replace the front or rear main seal.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found
• Crankshaft Position Sensor Failure
  • Description/Symptoms: The engine stalls intermittently, runs rough, or doesn’t start at all. Check engine light illuminated with a code related to the crankshaft position sensor.
  • Solution: Replace the crankshaft position sensor.
  • Estimated Cost to Fix: $100 - $300+
  • Recalls: None Found

Transmission

5-Speed Manual

• Synchro Wear (Specifically 2nd Gear)
  • Description/Symptoms: Grinding or difficulty shifting into 2nd gear, especially when cold.
  • Solution: Rebuild or replace the transmission, including replacing the worn synchros.
  • Estimated Cost to Fix: $800 - $3000+
  • Recalls: None Found

6-Speed Manual

• Synchro Wear (Specifically 2nd Gear)
  • Description/Symptoms: Grinding or difficulty shifting into 2nd gear, especially when cold.
  • Solution: Rebuild or replace the transmission, including replacing the worn synchros.
  • Estimated Cost to Fix: $800 - $3000+
  • Recalls: None Found

4-Speed Automatic

• Harsh Shifting/Slipping
  • Description/Symptoms: Rough or delayed shifts between gears. The transmission may slip, causing the engine to rev without a corresponding increase in speed.
  • Solution: Perform a transmission fluid flush and filter change. If the problem persists, the transmission may require rebuilding or replacement.
  • Estimated Cost to Fix: $150 - $3000+
  • Recalls: None Found

Suspension

• Broken/Sagging Springs
  • Description/Symptoms: Uneven ride height, especially noticeable at the rear. Clunking noises when going over bumps.
  • Solution: Replace the front and/or rear springs.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found
• Worn Bushings
  • Description/Symptoms: Clunking or rattling noises from the suspension, especially when driving over bumps or rough roads. Loose or vague handling.
  • Solution: Replace worn bushings (control arm bushings, sway bar bushings, etc.).
  • Estimated Cost to Fix: $100 - $500+ per bushing/location
  • Recalls: None Found

Electrical

• Power Window Failure
  • Description/Symptoms: The power windows stop working, either intermittently or completely.
  • Solution: Replace the power window motor or regulator. Check the wiring harness for damage.
  • Estimated Cost to Fix: $150 - $400+ per window
  • Recalls: None Found
• Instrument Cluster Illumination Issues
  • Description/Symptoms: Dim or non-functional instrument cluster lights. Some gauges may stop working.
  • Solution: Replace bulbs or repair the instrument cluster.
  • Estimated Cost to Fix: $50 - $300+
  • Recalls: None Found

Exterior

• Soft Top Issues
  • Description/Symptoms: Tears, leaks, or broken zippers on the soft top. Difficulty latching or unlatching the top.
  • Solution: Repair or replace the soft top. Replace damaged hardware.
  • Estimated Cost to Fix: $50 - $1500+
  • Recalls: None Found

Interior

• Broken Door Handles
  • Description/Symptoms: The interior or exterior door handles break, preventing the door from opening.
  • Solution: Replace the broken door handle.
  • Estimated Cost to Fix: $50 - $200+
  • Recalls: None Found
• Center Console Latch Failure
  • Description/Symptoms: The latch on the center console breaks, preventing it from closing securely.
  • Solution: Replace the latch mechanism or the entire center console.
  • Estimated Cost to Fix: $20 - $150+
  • Recalls: None Found

Summary

The 2003 Mazda Miata is generally a reliable vehicle, but like any car of its age, it is prone to certain issues. Engine oil leaks and soft top problems are relatively common. Suspension components, particularly bushings and springs, can wear out over time. Transmission issues, especially synchro wear in the manual transmissions, can also occur. Electrical problems, such as power window failures, are also possible. The severity and cost of these issues can vary widely, from minor repairs costing under $100 to more extensive repairs requiring hundreds or thousands of dollars. Careful inspection and maintenance can help prevent or mitigate many of these issues.