Which parts fail
Components named in complaints (engine, cooling system, oil leaks, timing chain, exhaust).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2005 Mazda Mazda3 owners, lightly cleaned up (personal details are redacted by NHTSA).
Dt*: the contact stated while driving 50 MPH on a highway, all power failed as the vehicle was steered to the left into traffic on 4 separate occasions. The vehicle was restarted and taken to the service dealer for inspection after the first three occasions, but diagnostics failed to recreate the failure. On the 4th occasion when the power failed, the vehicle impacted the guardrail head on. Emergency medical and police responded to the accident and a police report was taken. The contact sustained minor injuries to the shoulder along with bruising to the upper body. Seatbelts were worn at the time of the accident. The vehicle was towed to the service dealer and the manufacturer was notified. Photos were taken by the contact. Updated 10/31/2006 -
Tl* the contact owns a 2005 Mazda 3. While driving at approximately 65 MPH, there was an abnormal noise and the vehicle stalled. The failure recurred once. The vehicle was towed to an independent mechanic where it was diagnosed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage 125,000. The VIN was not available.
Engine failed entirely during routine highway driving, vehicle lost forward propulsion, eventually coming to complete stop on the road. There were zero warning or any notice at all that the engine was dying. I was stranded on the side of the road for over 1 hour, while help arrived.
I was driving my 2005 Mazda 3 to the dealership to get it serviced, engine noise, and it caught fire less than a block from the dealership.. Mazda stated that they are not at fault even though my car is still under warranty..
Plague with fuel system problem. 1st time check engine came on, when car reached 44,000 miles. I took it to dealer, they ran a diagnostic, and replaced the o2 sensor. Warranty covered. 2nd time check engine came on at 51,000 miles. Dealer replaced 2 of the fuel injectors. When car reach 85,000 miles, engine started sputtering when I pressed gas pedal, engine just dies on the street. This time dealer said fuel pump might be bad. So we got it replaced for $800. When car reach 100,000 miles I had fuel line cleaned from fuel tank to the fuel injectors, and replaced spark plugs. At 105,000 miles check engine light came on again. I took car to autozone parts and had it read. The code says, p2004 (variable tumble shutter valve stuck open). …
We have had a 2005 Mazda 3 hatchback for little over a year and a half. We bought the car with 30,000 miles and have added around 26,000 more. Regularly keeping it serviced on our own accord with out taking it in to the dealership. The engine began making a knocking sound in the engine that seemed to be getting worse with time. After about a week we decided to take the car into the dealership. Their investigation found that there were metal shavings in the oil and that engine was failing (in 2005 car with only 56,000 miles on it) and that it would cost 7000$ for a new engine. We believed this to be a faulty engine rather than owner liability. We tried to contact Mazda customer service. They were rude and belligerent. When asked to speak to the supervisor, she was also rude and unresponsive. …
2005 Mazda 3 air compressor goes out, lines fry under hood after doing some research on the issue on the internet, I found that many individuals are having the same issue under 60,000 miles and the A/C never works to maximum output. Contacted Mazda and while they say they are aware of the problem, no recall has been proposed, therefore I was redirected to this site. Contacted Mazda over a year ago under the advice of 2 mechanics who insisted this incident should not happen to such a young car. They said I'm lucky there was no fire since all my lines nearly fried and Mazda needs to be made aware, especially after my mechanic did his own research on my behalf and seem to agree this is too common. I have been following up with Mazda's customer care and while they are empathetic, there's no solution for anyone experiencing this issue. …
2005 Mazda 3s with only 39K miles broke down with heavy smoke, near fire, fortunately at dia airport. Towed to local denver Mazda dealer, who diagnosed a seized A/C compressor. Contacted Mazda national customer care, who covered the $1K cost of the new compressor, with me picking up the labor. Out of warranty, barely; this kind of thing should not happen for a young vehicle, original owner, with pampered preventative mnx per schedule. I do appreciate the fact Mazda stepped up to compensate a majority of the repair cost. I continue to be very annoyed at the poor brake design, that squeals most of the time, using OEM parts, especially in reverse in colder temps.
I developed a tick in the engine, took to dealer who diagnosed " the shutter valve inside the intake manifold was coming apart". Took it to another independent Mazda repair shop and was told "the valve is actually just stuck open". Both shops quoted a $1500 repair bill. This should not happen to a car that is only 5 1/2 years old. You can't just replace the plastic shutter valve, you have to replace the entire intake manifold (that part costs $1000). Since I only paid $14,000 total for the whole car, I am very upset with (my 1st and last) Mazda. I will repair and sell asap.
I had done my oil change about 3 weeks before I was driving to work and I felt my car running different, when I brake and took a right turn, and the engine oil pressure came on, I checked and the amount of oil in my car was minimum, the car has no leaks and I had checked that with a mechanic, so the car is burning oil.. I had been talking to many mechanics and people from auto part stores about this problem on my engine, and they say that many, if not all of them Mazda3 cars from this year have that problem, and the problem is from the way it is manufactured.
Engine complaints in other Mazda3 years
Frequently asked questions
How common are engine problems on the 2005 Mazda Mazda3?
NHTSA has 23 complaints about the engine & cooling of the 2005 Mazda Mazda3, 24% of the model year's 97 complaints. The component named most often is engine (4 mentions).
Is there a recall for 2005 Mazda Mazda3 engine problems?
No. NHTSA lists no engine & cooling recall for the 2005 Mazda Mazda3, though it has 2 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2005 Mazda Mazda3 engine problems start?
Half of the complaints with a recorded mileage happened before about 52,000 miles, and 12% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 1 fire and 1 injury to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.