Ignition Switch with 2 Keys 6665606 Replacement for Bobcat Loaders 310 313 322 440 530 533 630 631 MT50 MT521 OE Number: The part number for reference includes 6665606, MG641833, 91033317, 641833, S68213, and 31527. Please confirm compatibility with your original equipment. Applicable Models: Replacement for Bobcat Skid Steer Loaders 440, 443, 453, 463, 530, 533, 540, 542, 543, 553, 630, 631, 632, 641, 642, 643, 645, 653, 730, 731, 732, 741, 742, 743, 751, 753, 763, 773, 843, 853, 863, 864, 873, 943, 953, 963, 1213, 1600, 2000, 2400, 2410, 7753, MT50, MT52, MT55. Replacement for Bobcat Excavators 310, 313, 320, 322, 323. Simple Installation: Direct replacement for original parts, no modifications required. Easy and convenient to install. Direct Replacement: Manufactured to meet original equipment specifications, ideal replacement for old or damaged units, improves operational efficiency. Premium Material: Constructed from high-quality aluminum alloy with advanced craftsmanship, durable, scratch-resistant, and wear-resistant for long-term use.