Husqvarna 539132140 Lawn Tractor Seat Switch Genuine Original Equipment Manufacturer (OEM) Part This part is compatible with models including; Z4219BF-968999763,968999656,968999655,RZ4619,917204140,966612301,RZ4219/250201,917289821,917289820,RZ4219,Z4824BF-968999517,RZ5422,917277730,966659301,968999508,Z4619BF-968999764,966042901,Z4220BF-968999685,917289880,RZ4219BF-966582201,966582201,965881201,RZ3016 (966612301),917277780,965881401,968999512,968999517,968999511,Z4218-968999281,967721801-00,966455801,966809001,RZ5424/966659301,Z4619-968999656,917277790,RZ4219-966809001,289820,917277710 Seat switch 539132140 prevents the engine from starting or running if the driver leaves the seat Genuine Original Equipment Manufacturer (OEM) part. Compatible Brands: Husqvarna,Craftsman,Poulan This seat switch (part number 539132140) is for lawn tractors Wear work gloves to protect your hands when installing this part