Changing spark plugs on Porsche Boxter

Loosen the wheel nuts

Raise the car using the jack at the location of the pad provided for this purpose.

Finish unscrewing the wheel nuts and remove the wheel

Place a candle to support the rear cradle

Once the car is lifted, the coils are directly accessible

Before unscrewing the coil screws it is best to disconnect the coil wire first (terminal circled in red)

Once disconnected, the coils are held by 2 5mm BTR screws (blue arrow), unscrew them.

Extract the coil by pulling on it (without difficulty)

Insert the spark plug wrench (16mm) into the coil location. You can add 1 or 2 extensions for more ease

Unscrew the spark plug, normally these are only slightly tightened.

Check that the spark plugs match well, especially in terms of base length (in red)

Replace the new spark plug and tighten it to 30NM + 3NM using the wrench provided for this purpose.

Then replace the coil and tighten the 2 5mm BTR screws to 10NM.

Reclip the cable onto the reel

Congratulations, you have just performed the operation for 1 of the 6 spark plugs. However, the operation is strictly the same for the other cylinders