2003 Mazda 6

The 2003 Mazda 6 marked Mazda’s return to the mid-size sedan market. It was lauded for its sporty handling, stylish design, and fun-to-drive nature, differentiating it from more appliance-like competitors. Owners often appreciated its engaging driving dynamics, responsive steering, and overall value. However, some common complaints included premature rust, some reliability concerns, and interior component quality. The 2003 Mazda 6 came with three engine options: a 2.3L inline-4 producing 160 hp and 155 lb-ft of torque, a 3.0L V6 producing 220 hp and 192 lb-ft of torque, and a 2.0L inline-4 that was offered outside of the US market. Transmission options included a 5-speed manual, a 5-speed automatic (for the 2.3L I4 and 3.0L V6), and a 4-speed automatic (exclusively for the 2.0L I4 outside the US).

Engine

2.3L Inline-4

• Timing Chain Issues
  • Description/Symptoms: Rattling noise, especially on startup, can indicate a worn or stretched timing chain. This can lead to poor engine performance, misfires, and eventually engine failure if not addressed.
  • Solution: Replacing the timing chain, guides, and tensioner. It’s often recommended to replace the water pump at the same time.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found
• Variable Valve Timing (VVT) Actuator Failure
  • Description/Symptoms: Engine rattle, rough idle, decreased fuel economy, and check engine light. Related to the timing chain issues.
  • Solution: Replacement of the VVT actuator, along with inspection/replacement of related components if damage is present.
  • Estimated Cost to Fix: $500 - $1000+
  • Recalls: None Found
• Intake Manifold Runner Control (IMRC) Valve Failure
  • Description/Symptoms: Loss of power, poor fuel economy, check engine light.
  • Solution: Replacement of the IMRC valve or the entire intake manifold.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

3.0L V6

• Oil Leaks
  • Description/Symptoms: Oil leaks are common from the valve cover gaskets and the front crankshaft seal. This can lead to low oil levels and potential engine damage. Visible oil leaks on the engine or oil spots under the car.
  • Solution: Replacement of the leaking gaskets or seals.
  • Estimated Cost to Fix: $200 - $600+
  • Recalls: None Found
• Coil Pack Failure
  • Description/Symptoms: Misfires, rough running engine, check engine light.
  • Solution: Replacement of the faulty coil pack(s).
  • Estimated Cost to Fix: $100 - $300+ per coil pack
  • Recalls: None Found

Transmission

5-Speed Automatic (Both 2.3L and 3.0L)

• Slipping or Harsh Shifting
  • Description/Symptoms: Delayed engagement, slipping between gears, hard shifts, especially between 2nd and 3rd gear.
  • Solution: Transmission fluid change (may provide temporary relief), valve body replacement, or complete transmission rebuild/replacement.
  • Estimated Cost to Fix: $150 (fluid change) - $3000+ (rebuild/replacement)
  • Recalls: None Found

Suspension

• Rear Control Arm Bushing Failure
  • Description/Symptoms: Clunking noises from the rear suspension, especially over bumps. Poor handling and tire wear.
  • Solution: Replacement of the rear control arm bushings. Often easier and sometimes cheaper to replace the entire control arm.
  • Estimated Cost to Fix: $200 - $600+ per side
  • Recalls: None Found
• Strut Mount Failure
  • Description/Symptoms: Squeaking, popping, or clunking noises from the suspension, especially when turning.
  • Solution: Replacement of the strut mounts. It is usually recommended to replace the struts themselves at the same time.
  • Estimated Cost to Fix: $300 - $800+ per axle
  • Recalls: None Found

Electrical

• Alternator Failure
  • Description/Symptoms: Dimming headlights, battery light on, difficulty starting, and eventual complete electrical failure.
  • Solution: Replacement of the alternator.
  • Estimated Cost to Fix: $300 - $600+
  • Recalls: None Found
• Power Window Motor Failure
  • Description/Symptoms: Window not going up or down, or moving very slowly.
  • Solution: Replacement of the power window motor.
  • Estimated Cost to Fix: $200 - $400+ per window
  • Recalls: None Found

Exterior

• Rust (Especially Rear Wheel Arches and Rocker Panels)
  • Description/Symptoms: Visible rust bubbles, perforation of the metal.
  • Solution: Rust repair, including cutting out affected areas, welding in new metal, and painting.
  • Estimated Cost to Fix: $500 - $2000+ per area (highly variable depending on severity)
  • Recalls: None Found

Interior

• Center Console Cup Holder Failure
  • Description/Symptoms: The sliding cover for the cupholders breaks easily.
  • Solution: Replacement of the cupholder assembly or complete center console.
  • Estimated Cost to Fix: $50 - $200+
  • Recalls: None Found
• Sun Visor Sagging
  • Description/Symptoms: The sun visors do not stay in the upright position and droop down.
  • Solution: Replacement of the sun visor.
  • Estimated Cost to Fix: $50 - $150+ per visor
  • Recalls: None Found

Summary The 2003 Mazda 6, while praised for its sporty driving experience and styling, does have its share of common problems. Engine issues, particularly with the 2.3L I4’s timing chain and the 3.0L V6’s oil leaks, are relatively frequent and can be costly to address. Transmission problems, especially slipping or harsh shifting in the automatic, also require attention. Rust is a significant concern, particularly in regions with road salt usage. Suspension issues, specifically with the rear control arm bushings, can impact handling and tire wear. Overall, while the Mazda 6 offers a fun driving experience, potential buyers should be aware of these potential maintenance costs and thoroughly inspect the vehicle before purchasing. The severity of these issues range from minor inconveniences (sun visor sagging) to major repairs (transmission rebuild), and costs can vary significantly depending on the extent of the damage.