NO
Just the connector/resistors under each coil [ 3 ]
They break down from heat as they are trapped under the coils..
The spring on the connector looses temper [ it is a friction connection] and fails , whereas the other 3 plugs have snap on connectors , so they should be OK..

While there , I always check the plugs cuz they will be carboned from mis-fire.
You prolly already know to use only Bosch F8DC4 on that engine [ again, cheap to just change them..]
I seee so many guys change ECUs and throttle acuators, MAFs , etc , and wind up solving their 104 problems with some connectors and plugs..
So, I start at that end first..........along with the newer OVP.