INA ZS-S1279 Engine Timing Crankshaft Sprocket - Outer

INA Timing Crankshaft Sprocket ZS-S1279

The INA ZS-S1279 engine timing crankshaft sprocket is built for OE-style timing system service on a wide range of Ford, Mercury, Mazda, and Land Rover applications. It is a direct-fit outer crank sprocket for vehicles such as the Ford Explorer, Ranger, Mustang, and Mercury Mountaineer.

Key Features

• Engine timing crankshaft sprocket for outer crankshaft position
• Made from powdered metal, steel, or cast iron depending on application design
• Heat treated to exact hardness specifications for timing system durability
• Engineered to meet or exceed OE quality and performance targets
• Cross-reference part number: 5540839100

Product Details

INA timing gear and sprocket components are manufactured to match original equipment standards for fit and function. The ZS-S1279 is used in timing drive service where precise crankshaft-to-camshaft synchronization is required. This part number, ZS-S1279, is listed for outer crankshaft applications across multiple platforms, including Ford Explorer, Ford Ranger, and Mercury Mountaineer models. It also appears in fitment for Ford Mustang, Mazda B4000, Land Rover LR3, and Ford Explorer Sport Trac.

Compatible With 1997-2010 Ford Explorer, Outer; 2001-2010 Ford Ranger, Outer; 1998-2010 Mercury Mountaineer, Outer; 2005-2010 Ford Mustang, Outer; 2001-2009 Mazda B4000, Outer; 2005-2007 Land Rover LR3, Outer; 2001-2005 and 2007-2010 Ford Explorer Sport Trac, Outer; and 2001-2003 Ford Explorer Sport, Outer.

What This Part Helps Address

• Worn or damaged crankshaft sprocket teeth
• Timing chain drive noise caused by sprocket wear
• Incorrect cam/crank synchronization from timing component wear
• Service replacement needs during timing system repair
• Restoration of proper timing drive engagement on outer crank applications

Installation Notes

Verify engine code, timing system layout, and crankshaft sprocket position before installation. Inspect the timing chain, guides, tensioners, and related wear components at the same time to avoid repeat service. Confirm the part number ZS-S1279 and the vehicle-specific application before assembly.

Quality Assurance

INA manufactures timing sprockets to OE-level quality standards using controlled materials and heat treatment processes for consistent hardness and performance.