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3966404
Spark Plug Wire
Cummins®

IN STOCK

Cummins®

More than 10 are currently available

Ships within 1 business day

$45.99 $59.79
Genuine OEM Part

This truck part is made by Cummins®. We guarantee that all of our parts are from the OEM (original equipment manufacturer), ensuring a proper fit and quality manufacturing. We make it easy to buy truck parts online.

Manufacturer Warranty*
DESCRIPTION
A spark plug wire is an integral part of a truck's ignition system, responsible for delivering electrical current from the distributor or ignition coil to the spark plugs. The 3966404 model is a specific type of spark plug wire used in certain makes and models of trucks. These wires are made up of an insulated core, typically composed of silicone or EPDM rubber, surrounded by a conductive metal strand that transmits the electrical current. The ends of the wire are fitted with connectors that attach to both the distributor and spark plug terminals. Over time, exposure to heat and vibration can cause these wires to degrade and fail, leading to misfires and other performance issues. It's important to regularly inspect and replace worn out spark plug wires as part of routine maintenance on your truck's engine.
RELATED PARTS
Supersedes
3931678, 3934221, 3938886

SPECIFICATIONS

Package Dimensions
6.0 x 2.0 x 1.5 in
Weight
0.185 lbs
* This information is provided as is and may be out of date. Please contact us or the manufacturer to verify warranty coverage.
* Variable geometry turbocharger and electronic actuator repairs are not eligible to be claimed as over-the-counter under New or ReCon parts warranty for parts installed after October 1, 2018.
* Diesel Oxidation Catalyst (DOC), Diesel Particulate Filter (DPF), Selective Catalyst Reduction (SCR) catalyst, and Electronic Control Module (ECM) repairs are not eligible to be claimed as over-the-counter under New or ReCon parts warranty for parts installed after January 1, 2020.
* These restrictions are only applicable to New parts and ReCon parts coverages for the components listed above sold to a customer in the US or Canada. All other coverages are excluded. All other regions are excluded.

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