Relatively easy for a novice amateur mechanic. Fits perfectly on my 2004 VW Passat 1.8t if you recommend having heat resistant tape handy as the crimp connectors are cumbersome when not taped together. I only had one broken coil connector (very dry rotted - shattered into pieces in my hand checking for misfires) but now I have three spares for a great price in case any of the other connectors break!
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