Please check notes in each part listing to ensure the Idler Pulley is correct for your 1990 MAZDA B2600 with a 2.6L engine. Special restrictions like "California only" or "with sport package" may indicate a Idler Pulley fits only certain 1990 MAZDA B2600 models.
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Manufacturer & Part #
DAYCO Part # 89039
81mm x 12mm 1/2 inch V-Belt Pulley (#231039, 89039FN)