2003 Mazda Protege Problems

What owners report

Owners of this model year most often describe intake-manifold shutter (VICS) screws working loose and damaging spark plugs or the engine, along with seat-belt buckles that stop latching and occasional engine stalling. Complaints span a wide mileage range, from a few thousand miles to well past 150,000, with several reports of rust in the front strut towers on older, salt-road cars.

1. 1
   Engine cooling

   Loose intake manifold shutter screws damaging engine

   • 34 complaints (28%)
   • median 70,900 mi at 5.0 yrs old (32 state mileage)
   • 2 mention a crash, fire or injury
   • owner-quoted repair $1,000 (median of 6 quotes)
   • filed 2003–2020

   Owners describe a rattling or knocking noise from the engine, rough running, a misfire code, and in some cases a stalled engine. Several report that screws from the intake manifold shutter valves backed out and were drawn into a cylinder, closing the spark-plug gap or damaging the piston, with repairs ranging from replacing plugs to replacing the manifold or engine. Some owners say their vehicle fell outside the build range covered by an emissions recall describing the same symptom. Reported from roughly 13,000 to over 180,000 miles, often noticed during normal driving or at idle.

   2 related service bulletins

   What to check: Ask whether the intake manifold shutter screws or manifold were ever inspected or replaced, and whether any emissions recall work was performed. Listen for rattling at idle and check for repeated misfire codes.

   2 excerpts from owner complaints in NHTSA records

   “My 2002 Protege 5 (built december 2002) had a catastrophic engine failure, due to loose vics screws from the intake manifold coming loose and being sucked into the combustion chamber. These screws sheared off the top of my spark plug, and destroyed my piston and valves. The outward symptoms was a loud 'coin in the washing machine' sound coming from my engine, followed by a sudden loss of power and stalling. After the engine was opened, 3 of 8 vics screws were off completely, and the remaining 5 were loose. …”

   NHTSA complaint #10273142, filed 2009-06, 72,000 miles

   “Purchased a pre owned 2003 Mazda Protege with approximately 50,000 miles on it. I drove the vehicle for about 4000 miles before there was an engine failure. There were no events that lead up to this incident. The engine began to make a loud knocking noise. I had it towed to the dealer of purchase. A screw on an the intake came loose and went into the engine cylinder. Damage caused the engine to need to be replaced. Mazda has recall 3005c for this problem for the exact year, model, and engine as the one I purchased. …”

   NHTSA complaint #10195432, filed 2007-07, 58,000 miles
2. 2
   Seat belts

   Seat belt buckle will not latch or falls apart

   • 12 complaints (10%)
   • median 91,500 mi at 7.2 yrs old (10 state mileage)
   • filed 2007–2015

   Owners report the driver or passenger seat-belt buckle failing to click into the receptacle, sometimes after becoming stiff, and in other cases the buckle breaking apart internally so the belt no longer holds. Some describe the warning light staying on; dealers or shops typically replaced the buckle assembly, and some owners were told the repair was not covered once out of warranty. Mostly reported between about 40,000 and 150,000 miles, on cars of varying age.

   What to check: Buckle and unbuckle every seat belt, including the rear ones, and check that each latches firmly and releases cleanly.

   2 excerpts from owner complaints in NHTSA records

   “The driver seat belt will no longer work. The male end will not connect to the female end. I looked with a flashlight and there were broken pieces inside. It looks like the buckle came apart. I now have to use the passenger side seat belt buckle.”

   NHTSA complaint #10542626, filed 2013-09, 109,687 miles

   “I was pulling up to my residence when the seat belt popped out of the receiver by itself.. I tried to re-latch the seat belt and it would not latch. I attempted a few more times and the seat belt receiver completely fell apart..”

   NHTSA complaint #10695508, filed 2015-03, 131,000 miles
3. 3
   Engine cooling

   Engine stalling and rough idle

   Mentioned in 10 of 80 sampled complaints

   Owners describe the engine stalling at stop lights or while driving, sometimes with a knocking or rattling noise beforehand, and restarting afterward. Several say the dealer could not reproduce the problem, while others had misfire codes read and plugs or the intake manifold replaced. Spread across the mileage range, from a few thousand miles up to around 100,000.

   1 related service bulletin

   What to check: Take a test drive that includes idling at lights and a cold start, and ask whether the throttle body or idle control has been serviced.

   2 excerpts from owner complaints in NHTSA records

   “Car stalled at red light, there was a loud knocking sound coming from the engine. After stalling t more times the car ran for another 3 minutes to ge me home for the evening. I then to it to my local Mazda service center.”

   NHTSA complaint #10106112, filed 2005-01, 14,475 miles

   “2003 Mazda Protege 5 stalled when trying to accelarate from a stop light. This has happened twice already. Both times I was able to restart the car without problems. The dealer can't duplicate problem, and can't figure out what is causing the the problem.”

   NHTSA complaint #10064365, filed 2004-04, 3,400 miles
4. 4
   Air bags

   Airbags not deploying in collisions

   • 10 complaints (8%)
   • median 17,750 mi at 2.1 yrs old (8 state mileage, few)
   • 8 mention a crash, fire or injury
   • filed 2002–2019

   Owners report front or side airbags not deploying in collisions that resulted in substantial damage, and in one case an airbag warning light recurring after repeated dealer visits. Some also note the passenger airbag could not be replaced because the part was discontinued. Reported from near-new mileage up to about 150,000 miles, generally after a collision.

   1 related service bulletin

   What to check: Check that the airbag warning light does not stay on after start-up, and ask whether any non-original accessories or steering-wheel changes were made.

   2 excerpts from owner complaints in NHTSA records

   “I was taking a corner on hwy 36 and hit gravel on the side of the road. The car went off the road did a nose dive into a ditch flip forward end over end, slid and rolled twice. Non of the air bags deployed. Neither driver or passenger. I am not positive but my car should have had side curtain air bags but they did not deploy either.”

   NHTSA complaint #10149590, filed 2006-02, 45,000 miles

   “I was involved in a head-on collision in my 2003 Mazda protege5 while traveling approximately 10-20mph. The other party was traveling approximately 20-25mph. Upon impact, the seat belt pretensioner didn't work (I was wearing my seat belt) and none of the airbags infated. The damage to the car was mainly structural, estimates to fix the car were approximately $13,000-$14,000, subsequently the car was 'totaled'. …”

   NHTSA complaint #10062776, filed 2004-03, 1,204 miles
5. 5
   Suspension

   Rust at strut towers and control arm noise

   • 10 complaints (8%)
   • median 99,000 mi at 8.5 yrs old (7 state mileage, few)
   • 1 mention a crash, fire or injury
   • filed 2003–2017

   Owners in salt-road areas describe rust eating into the front strut towers and lower control arms, with clunking noises over bumps and, in one report, a control arm separating. Some dealers attributed the damage to road impacts, and a service bulletin notes that oil mist on struts or shocks is often normal, so inspection matters. Mostly reported between about 85,000 and 160,000 miles on older cars driven in winter-salt conditions.

   5 related service bulletins

   What to check: Inspect the strut towers and lower control arms from underneath for rust and cracks, especially on cars from snowy regions, and listen for clunks over bumps.

   2 excerpts from owner complaints in NHTSA records

   “I bought the car from a smaller cheap dealership, I had no idea that the front end would be as bad as it got. My lower control arm / ball joint was so corroded every time I made a left turn it would make a loud noise in the left front wheel then would continue to happen over and over each time. This would happen often when it was dry and warm and sat for awhile. Living in buffalo, well you can not help but hit potholes in some places more than others. This would make the problem worse and throw my steering off while travel at a high rate of speed. …”

   NHTSA complaint #10584041, filed 2014-04, 99,000 miles

   “Passenger side strut tower has rusted to the point that failure of the suspension is imminent. The rust inhibitor that was applied from Mazda motor corp. During manufacturing, on the passenger front wheel well has failed and is allowing water, road salt etc to enter the engine bay and cause severe rusting on the top and side portion of the strut tower where the side motor mount and strut tower brace attach to the strut tower. …”

   NHTSA complaint #10605125, filed 2014-06, 134,000 miles

Buying note. Check the seat belts and airbag warning light, and ask for evidence that the intake manifold shutter screws were inspected or replaced, since that is the most commonly reported repair on this model year. On older examples, look closely at the strut towers and control arms for rust before buying.

Summary written with AI from a sample of 80 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.