John Deere M45123 Mower Deck Idler Tightener Spring is a John Deere equipment manufacturer (OEM) part designed to maintain proper tension on your mower deck idler. This high-quality spring ensures optimal performance and longevity for your mowing equipment. If you need assistance finding the right John Deere part or accessory, John Deere specialists are available Monday through Friday, 8:00 AM to 5:00 PM (EST), by calling 800-345-2396, or you can reach out via email for support. Hartville Hardware strives to provide accurate parts information sourced from reliable systems, but please note that parts and compatibility may change without notice. If you are uncertain about the part you need, their Customer Support Team is ready to help.