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How to Replace the Spark Plugs on a Toyota Highlander V6

Model: Toyota Highlander Xu20 - Years 2001-2007
Part: Spark plugs

This guide shows how to remove and replace the spark plugs in the engine of a Toyota Highlander V6 by following these simple steps. First, open the bonnet and disconnect the electrical connectors from the ignition coils; then unscrew the fastening screws using a 10 mm socket to remove the connectors, as shown in the video. At this point, use a socket with an extension to unscrew and remove the spark plugs, replacing them with new ones (having the correct heat rating); screw them in by hand and then tighten with a socket!

Updated on 16 June 2026 by ScegliAuto

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