INA ZS-S863A Engine Timing Idler Sprocket

Engine Timing Idler Sprocket for OE Fitment

INA ZS-S863A is an engine timing idler sprocket built for Chrysler, Dodge, Jeep, Mitsubishi, and Ram applications that use the listed OE-style timing gear setup. It is a direct-fit timing component for maintaining proper camshaft and crankshaft synchronization in supported vehicles.

Key Features

• Engine timing idler sprocket for valve train service
• Made from powdered metal, steel, or cast iron depending on application requirements
• Heat-treated to exact hardness specifications
• Built to meet or exceed OE quality and performance targets
• Cross-reference part number: 5540863100

Detailed Description

INA ZS-S863A timing gear/sprocket is engineered for precise timing operation in supported Jeep Grand Cherokee, Dodge Dakota, and Ram 1500 applications, along with other listed Chrysler Group and Mitsubishi models. As an OE-style replacement timing component, it helps maintain correct chain or gear alignment in engines that rely on an idler sprocket for timing control. This part number, ZS-S863A, is also referenced as INA Global Number 554 0863 100.

Compatible With 1999-2006 Jeep Grand Cherokee, Primary; 2000-2010 Dodge Durango; 2000-2010 Dodge Dakota; 2002-2012 Jeep Liberty, Primary; 2002-2010 Dodge Ram 1500; 2005-2010 Jeep Grand Cherokee, Primary; 2006-2010 Jeep Commander, Primary; 2006-2007 Mitsubishi Raider, Sprocket; 2007-2011 Dodge Nitro; 2007-2009 Chrysler Aspen; 2011-2013 Ram 1500; 2011-2012 Ram 1500, Primary; 2011 Ram Dakota, Primary; and 2011 Ram Dakota, Sprocket.

What It Helps Address

• Timing chain or gear alignment concerns during engine service
• Worn or noisy idler sprocket replacement needs
• Restoration of proper valve train timing in supported engines
• Replacement of a damaged OE-style timing gear component

Installation Notes and Quality Assurance

Install this sprocket only on engines listed in the fitment data and verify timing marks, chain condition, and related components before reassembly. Because timing system service affects engine operation, follow the factory service procedure for the specific vehicle and engine. INA manufactures timing gears and sprockets to OE-level material and hardness standards for consistent fit and function.