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Part number 278950 in the original Maserati catalog: where it sits in the assembly and what the factory calls it.
Belt Tensioner Idler Pulley Kit for Maserati Ghibli, Levante, and Quattroporte. Includes 278950, 278940, 286570, and 243857. For Maserati vehicles featuring the Ferrari F160 3.0L Twin-Turbo V6 Engine M157. Drive belt kit with 1 short alternator belt, 1 drive belt tensioner, and 2 drive belt pulleys as pictured. Located in Burlington.
This OEM diagram is the property of Maserati or its respective rights holder. It is provided free of charge for parts identification, maintenance, and repair purposes, consistent with the principles of Fair Use (17 U.S.C. § 107) and Right to Repair. Legal Disclaimer