Spark Plug Set – Volvo (8642661)

Spark Plug Set converts a physical condition into a signal the powertrain module acts on. The module compares that signal against an expected range at every start-up, so a failing unit is usually logged before it becomes a driveability complaint.

Replace the Spark Plug Set when the fault repeats with the harness already ruled out, when resistance drifts as the part heats up, or when a connector has corroded past cleaning. Swapping a sensor to chase a wiring fault is the most common wasted repair on these circuits.

Ordering reference for the Spark Plug Set is part number 8642661, categorised under Spark Plugs & Ignition. Match that number against the component you are removing before you order.

This is genuine VOLVO stock, supplied for the Spark Plug Set with the manufacturer number intact so the reference on the box matches the catalogue.

This is sold as an set; if only one component has failed, confirm whether the single part is available separately.