AT21880 Ignition Key Switch for John Deere Tractor 400 440 300 350 380 540 480

Product Overview

This aftermarket replacement ignition key switch is intended for the listed John Deere tractor applications and cross-references part number AT21880. An ignition switch controls electrical circuits associated with starting and operating a tractor.

Key Features & Performance

• Controls the ignition-related electrical circuits used during tractor starting and operation.
• Designed for servicing or replacing the corresponding ignition switch in the listed tractor applications.
• Cross-references part number AT21880 for component identification.
• Applies to the John Deere tractor models identified in the product title.

Fitment & Compatibility

• for John Deere 400 tractor applications
• for John Deere 440 tractor applications
• for John Deere 300 tractor applications
• for John Deere 350 tractor applications
• for John Deere 380 tractor applications
• for John Deere 540 tractor applications
• for John Deere 480 tractor applications

Common Uses

• Replacing a worn, damaged, or malfunctioning ignition switch.
• Routine servicing of a tractor starting and ignition electrical system.
• Restoring normal switch control after the existing component has failed.

Technical Specifications

• Product Type: Ignition key switch
• Part Number(s): AT21880
• Model Application(s): John Deere 400, 440, 300, 350, 380, 540, 480
• General Application: John Deere tractors

Frequently Asked Questions

Q: What does an ignition switch do? A: An ignition switch controls electrical circuits associated with starting and operating a tractor.

Q: How should fitment be verified? A: Compare the complete existing part number, including AT21880, with the complete tractor model designation before purchase.

This is an aftermarket replacement part and is not represented as genuine or original equipment. Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number, model year, or existing part number. Verify fitment before purchase.