s4 or s5 \'89 fc?

[L18M]

i thought S4 had square lights and the S5 had round rear lights??
but im prob completely wrong lol

[sheprx7]

i thought S4 had square lights and the S5 had round rear lights??
but im prob completely wrong lol

correct i prefer the s4 square lights though

[pdtaylor18]

Another way is to have a look at the ECU,see which version it is and also what the plug connections are like. They differ between the S4 and S5 pretty much throughout the car but definately at the ECU. The S5 ones tend to have much smaller pins whereas the S4 had a mix of larger and smaller pins in the plugs.
The only pic I have is the door ones and are in the side footwells.

The left hand one was JDM S4 and the right hand pic S5 UK

[rx7pat]

Mazda also offered an optional aero kit so the spoilers prob wont give you a good indication. As pete said have a look at the ECU connectors to be certain, most peeps (excluding pete lol) prob wouldnt change the wiring loom.