1991 model year · 300+ owner reports · Updated April 2026
According to Au7o's analysis of 300+ owner reports, the 1991 Mazda Protege has 2 documented known issues. No issues are rated critical, indicating generally reliable ownership. The most commonly reported issue is Engine Mount Deterioration with 160 owner reports. Across all issues, repair costs range from $80 to $600. DIY maintenance guides at au7o.io.
On the 1990-2003 Mazda Protege, engine mounts deteriorate causing excessive engine vibration and movement. Driver-side mount fails most commonly. Vibration is noticeable at idle and when shifting.
Replace failed engine mounts. Usually best to replace all 3-4 mounts as a set if vehicle has high mileage. Hydraulic mounts cannot be refilled — must be replaced.
Parts and tips from 160+ owners who fixed this issue
On the 1990-2003 Mazda Protege, thermostat sticks closed causing rapid overheating, or sticks open causing engine to run cold and poor heater output. Common failure on these engines past 80k miles.
Replace thermostat and housing gasket. Flush cooling system. Use OEM-temperature thermostat (not a colder aftermarket unit).
Parts and tips from 140+ owners who fixed this issue
EXTERIOR LIGHTING:HEADLIGHTS
DOPE, INC. IS RECALLING 42,540 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES OF VARIOUS PART NUMBERS SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES. THESE HEADLAMPS FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, "LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT." THESE LAMPS DO NOT CONTAIN THE REQUIRED AMBER SIDE REFLECTORS.
EXTERIOR LIGHTING
SABERSPORT IS RECALLING 16,270 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES OF VARIOUS PART NUMBERS SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES. THESE HEADLAMPS FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, "LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT." THESE LAMPS DO NOT CONTAIN THE REQUIRED AMBER SIDE REFLECTORS.
EXTERIOR LIGHTING
CERTAIN ALFAOTTO COMBINATION HEADLAMPS SOLD AS REPLACEMENT LAMPS FOR USE ON THE ABOVE LISTED PASSENGER VEHICLES. SOME COMBINATION LAMPS THAT ARE NOT EQUIPPED WITH AMBER SIDE REFLECTORS FAIL TO CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT.
EXTERIOR LIGHTING
CERTAIN TRADESONIC COMBINATION LAMPS SOLD AS REPLACEMENT LAMPS FOR USE ON THE ABOVE LISTED PASSENGER VEHICLES. COMBINATION LAMPS NOT EQUIPPED WITH AMBER SIDE REFLECTORS FAIL TO CONFORM WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT.
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS
VEHICLE DESCRIPTION: PASSENGER VEHICLES. SOME LEFT SIDE REAR BRAKE HOSES WERE DAMAGED DURING ASSEMBLY. BRAKE FLUID LEAKAGE COULD OCCUR.
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According to Au7o's analysis of 300+ owner reports, the 1991-1991 Mazda Protege has 2 documented issues. The most frequently reported are: Engine Mount Deterioration, Thermostat Sticking and Overheating. None are rated critical, but regular maintenance is recommended.
The 1991-1991 Mazda Protege has 2 known issues documented across 300+ owner reports. No issues are rated critical, suggesting generally good reliability. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Mazda Protege issues range from $80 to $600, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
Engine mounts deteriorate causing excessive engine vibration and movement. Driver-side mount fails most commonly. Vibration is noticeable at idle and when shifting. Repairs typically run $200-$600. Severity: medium.
Thermostat sticks closed causing rapid overheating, or sticks open causing engine to run cold and poor heater output. Common failure on these engines past 80k miles. Repairs typically run $80-$250. Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
