2003 Mazda B4000

The 2003 Mazda B4000 is a compact pickup truck that shares its platform and many components with the Ford Ranger. It was offered with two engine options: a 2.3L inline-4 and a 4.0L V6. The 4.0L V6 produced approximately 207 horsepower and 238 lb-ft of torque. The B4000 is generally liked for its reliability, affordability, and practicality, while common dislikes include its fuel economy and relatively basic interior features. Available transmissions are a 5-speed manual and a 5-speed automatic.

Engine

4.0L V6

• Timing Chain Rattle
  • Description/Symptoms: A rattling noise, especially on startup, coming from the front of the engine. This can be caused by worn timing chain tensioners, guides, or the timing chain itself.
  • Solution: Replacing the timing chain components (chains, tensioners, guides, and possibly sprockets).
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found
• Thermostat Housing Leak
  • Description/Symptoms: Coolant leak from the thermostat housing, often resulting in overheating and low coolant levels.
  • Solution: Replacing the thermostat housing and gasket.
  • Estimated Cost to Fix: $150 - $300
  • Recalls: None Found

2.3L Inline-4

No Issues Found

Transmission

5-Speed Automatic

• Harsh Shifting/Slipping
  • Description/Symptoms: Hard or jerky shifts, especially between 2nd and 3rd gear. Slipping during acceleration or while trying to shift gears.
  • Solution: Replacing the transmission fluid. In some cases, a complete transmission rebuild or replacement may be necessary.
  • Estimated Cost to Fix: $150 - $300 (fluid change), $2000 - $4000+ (rebuild/replacement)
  • Recalls: None Found

5-Speed Manual

No Issues Found

Suspension

• Ball Joint Wear
  • Description/Symptoms: Clicking or popping noises from the front suspension, especially when turning or going over bumps. Loose steering and uneven tire wear.
  • Solution: Replacing the worn ball joints.
  • Estimated Cost to Fix: $300 - $600 per side
  • Recalls: None Found
• Leaf Spring Sagging/Breakage
  • Description/Symptoms: Rear end sagging, especially when carrying a load. Reduced ride height and potential cracking or breakage of the leaf springs.
  • Solution: Replacing the leaf springs.
  • Estimated Cost to Fix: $400 - $800 per side
  • Recalls: None Found

Electrical

• Door Lock Actuator Failure
  • Description/Symptoms: Door locks not working correctly, either failing to lock/unlock or working intermittently.
  • Solution: Replacing the faulty door lock actuator.
  • Estimated Cost to Fix: $150 - $300 per door
  • Recalls: None Found
• Instrument Cluster Issues
  • Description/Symptoms: Gauges not working correctly (speedometer, fuel gauge, etc.), or the instrument cluster going completely blank.
  • Solution: Repairing or replacing the instrument cluster.
  • Estimated Cost to Fix: $200 - $500+
  • Recalls: None Found

Exterior

• Rust (Frame/Body)
  • Description/Symptoms: Rust developing on the frame, body panels, or undercarriage of the vehicle. This is more prevalent in areas with harsh winters or salty roads.
  • Solution: Rust repair, body panel replacement, or frame repair/replacement (depending on the severity).
  • Estimated Cost to Fix: $200 - $5,000+ (depending on severity)
  • Recalls: None Found

Interior

• Seat Upholstery Wear
  • Description/Symptoms: The fabric seat on the vehicle may get worn, leading to uncomfortable driving.
  • Solution: Replace the seat with a new seat
  • Estimated Cost to Fix: $200 - $400+
  • Recalls: None Found

Summary

The 2003 Mazda B4000, while generally reliable, does have some common issues. The 4.0L V6 is prone to timing chain rattle and thermostat housing leaks. Both manual and automatic transmissions are generally reliable but automatics can experience harsh shifting or slipping with age. Suspension issues like ball joint wear and leaf spring sagging are also common. Electrical problems include door lock actuator failure and instrument cluster malfunctions. Rust can be a significant issue, especially in certain climates. The severity and cost of these issues can vary, but potential buyers should be aware of them and inspect the vehicle carefully before purchasing.