INA ZG0603 Engine Timing Chain Tensioner Guide - Left

INA Timing Chain Guide for BMW V8 and Inline Applications

The INA ZG0603 engine timing chain tensioner guide is built for BMW timing systems that require a left-side guide with OE-level material hardness and fit. It is a direct replacement for select BMW 740i, 650Ci, 550i, 650i, X5, 750i, 750Li, 545i, 645Ci, 745i, and 745Li applications.

INA timing chain guides are engineered to match or exceed original equipment performance, with plastic material formulated to meet OEM PA66 and PA46 grade requirements.

Key Features

• Part number: ZG0603
• Engine timing chain tensioner guide for the left side
• OE-style replacement for select BMW timing chain systems
• Plastic material matched to OEM PA66 and PA46 grade standards
• Designed for consistent hardness and wear characteristics
• Cross-reference: INA Global Number 555 0603 100

Detailed Description

INA ZG0603 is an engine timing chain guide designed for BMW engines that use a left-position guide in the valve train system. It serves as a replacement timing component for maintaining proper chain routing and guide surface integrity in select BMW 740i, 650Ci, 550i, 650i, X5, 750i, 750Li, 545i, 645Ci, 745i, and 745Li models. The ZG0603 part number is also identified by INA Global Number 555 0603 100.

Compatible With: Fits 2011-2013 BMW 740i, Left; Fits 2006-2011 BMW 650Ci, Left; Fits 2006-2010 BMW 550i, Left; Fits 2006-2010 BMW 650i, Left; Fits 2004-2010 BMW X5, Left; Fits 2006-2008 BMW 750i, Left; Fits 2006-2008 BMW 750Li, Left; Fits 2004-2006 BMW 545i, Left; Fits 2004-2005 BMW 645Ci, Left; Fits 2002-2005 BMW 745i, Left; Fits 2002-2005 BMW 745Li, Left.

What It Helps Address

• Timing chain noise from a worn guide surface
• Chain misalignment caused by guide wear
• Rattling or slack in the timing chain path
• Valve train timing instability from damaged guide material
• Replacement needs during timing system service on BMW engines

Installation Notes and Tips

Verify the left-side position and confirm engine application before installation. Timing chain guide replacement is typically performed during timing system service, so inspect related components such as the chain, tensioner, and adjacent guides at the same time. Follow BMW service procedures and torque specifications for proper installation.

Quality Assurance

INA timing chain guides are manufactured to meet or exceed OE quality and performance expectations. The guide material is formulated to match OEM PA66 and PA46 grade requirements for hardness and durability.