Both are 6.5"
Front are 6.5" round and rear are 5x7" oval
they are five and a quarter...
FRONT DOORS ARE 5X7 OR 6X8
4 inch in front an d rear doors
The front (door) speakers are round 5-1/4"
Front are 4x6 Rear 6.5
Everything I can find indicates that all four are 5x7 inch speakers.
The speaker size of a 1993 Ford Escort 1.6 CLX is 9 inches. This is the standard size for most cars in this class and provides a good balance of quality and performance.
1993 mercedes station wagon 3.2 liter
engine diagram for a 1993 saturn
Crutchfield.com has vehicle specific information available regarding factory speaker sizes etc. Check them out!
You should also check the relay and the temperature sensor.