Ignition Key & Switch AT21880 for John Deere 440 450 570 570A 350 380
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Ignition Key & Switch AT21880 for John Deere
This ignition key & switch AT21880 for John Deere replaces OEM part number AT21880 and restores reliable starting for your machine.
Overview
This ignition key & switch AT21880 for John Deere is a direct replacement assembly that delivers consistent electrical contact for dependable engine start-up. It is built for John Deere models 440, 450, 570, 570A, 350, and 380, providing a simple fix for worn ignition components.
Built For Performance
- Replaces OEM part number AT21880 for precise fit
- Includes both key and switch for complete replacement
- Robust contacts resist corrosion and wear
- Easy plug-and-play installation with standard wiring
- Compatible with 12-volt electrical systems
Fits These Machines
- for John Deere 440
- for John Deere 450
- for John Deere 570
- for John Deere 570A
- for John Deere 350
- for John Deere 380
On-The-Job Use
- Start crawler dozers and loaders in construction and land clearing
- Operate compact utility tractors for farm and ranch chores
- Restore ignition function on vintage John Deere equipment
- Replace broken or worn switches during routine maintenance
Specs At A Glance
| Part Number(s) | AT21880 |
| Type | Ignition Key & Switch |
| Voltage | 12V |
| Fitment | John Deere 440, 450, 570, 570A, 350, 380 |
Good To Know
Q: Will this ignition key & switch AT21880 work on my John Deere 450? A: Yes, this assembly matches the original AT21880 part and is designed to fit the 450 and other listed models. Always verify your serial number to confirm exact compatibility.
Q: How do I install this ignition switch? A: Disconnect the battery, remove the old switch, connect the wiring harness to the new switch, and mount it in place. Most installations take under 30 minutes with basic hand tools.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.