In earlier vehicles, they are used to directly turn the compressor off to avoid compressor failure. Global Parts Distributors. Warranty Duration. 30-13468, 3013468, 36206, 43-MT1541, 5L3T-AA, 5L3TAA, 925124, E96-5235, E965235, MT1541, MT1541-10, MT1541-20, MT1541-5, MT154110, MT154120, MT15415, RAA1735.