1994 Mazda Protege Problems: 1 Issues Every Owner Should Know
1994 model year · 140+ owner reports · Updated May 2026
According to Au7o's analysis of 140+ owner reports, the 1994 Mazda Protege has 1 documented known issues. No issues are rated critical, indicating generally reliable ownership. The most commonly reported issue is Thermostat Sticking and Overheating with 140 owner reports. Across all issues, repair costs range from $80 to $250. DIY maintenance guides at au7o.io.
All 1 Known Issues
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.
Common Symptoms
- Engine overheats quickly
- Temperature gauge fluctuates
- Heater blows cold air
- Engine runs cold in winter
- Check engine light for coolant temp
How to Fix
Replace thermostat and housing gasket. Flush cooling system. Use OEM-temperature thermostat (not a colder aftermarket unit).
What Owners Are Using
Parts and tips from 140+ owners who fixed this issue
- TipReplace the thermostat proactively when doing any cooling system work — they are cheap insurance
- UpgradeStant thermostat — OE-spec temperature control (Stant Thermostat)
- UpgradeGates thermostat with housing for complete replacement (Gates Thermostat)