Walker 921-2140 Ignition Coil

Ignition Coil Overview

Walker ThunderSpark ignition coil 921-2140 is a direct-fit ignition component for specific 2001 applications. It is built for Cylinder 1 service and supports consistent spark delivery in the ignition system.

Compatible With 2001 INFINITI QX4 and 2001 Nissan Pathfinder, this ignition coil is identified by part number 921-2140 and is part of the ThunderSpark line.

Key Features

• Ignition coil for Cylinder 1 service
• Walker ThunderSpark product line
• Direct-fit replacement for listed applications
• Part number 921-2140 for accurate ordering

Detailed Description

The Walker 921-2140 ignition coil is specified for 2001 INFINITI QX4 and 2001 Nissan Pathfinder applications at Cylinder 1. As an ignition coil, it converts low-voltage electrical input into the high-voltage output needed to fire the spark plug and maintain proper engine operation. The ThunderSpark line identifies this component within Walker's ignition offering, and the 921-2140 part number helps confirm the correct match for the listed vehicles.

Common Issues This Part May Address

• Misfire caused by weak or inconsistent spark output
• Rough idle related to ignition coil failure
• Hard starting from poor ignition performance
• Loss of engine power tied to Cylinder 1 ignition problems

Installation Notes and Tips

Verify the vehicle application and Cylinder 1 location before installation. Confirm the connector style and mounting points match the original coil, and compare the old unit to Walker 921-2140 before final fitment. For best results, inspect related ignition components during service.