INA ZG-9-5891 Engine Timing Chain Tensioner

INA Timing Chain Tensioner for Mini Cooper

INA ZG-9-5891 is an engine timing chain tensioner for select Mini Cooper and Mini Cooper Countryman applications. It is built to meet or exceed OE quality and performance expectations, with plastic material formulated to match OEM PA66 and PA46 grade hardness requirements.

Key Features

• Engine timing chain tensioner for the valve train system
• OE-style material specification for consistent hardness and wear characteristics
• Designed for select 2007-2012 Mini Cooper and 2011-2016 Mini Cooper Countryman models
• INA ZG-9-5891 cross-references Dorman - HELP 91123 for the same application
• Part number ZG-9-5891 for accurate ordering and fitment lookup

Product Details

This INA timing chain tensioner is used in the engine timing system to maintain proper chain tension and support stable valve timing. For Mini Cooper and Mini Cooper Countryman engines, correct tension is important for keeping the timing chain engaged and reducing timing-related noise or irregular operation. The ZG-9-5891 is engineered with plastic material properties aligned to OEM PA66 and PA46 hardness standards, helping it match the original component’s material behavior in service.

Compatible With: Fits 2007-2012 Mini Cooper, N/A. Fits 2011-2016 Mini Cooper Countryman, N/A. This part number, ZG-9-5891, is also listed under alternate references including 9-5891.

Common Reasons for Replacement

• Timing chain noise from a worn or weakened tensioner
• Irregular chain tension affecting valve timing stability
• Plastic guide or tensioner wear in the timing system
• Service replacement during timing chain maintenance

Installation Notes and Quality

Install during timing system service with the engine properly secured and timing marks verified before reassembly. Because this is a valve train component, careful alignment and inspection of related timing parts is important during installation. INA manufactures timing chain guides and related components to OE-level material and performance standards, and ZG-9-5891 is built to match the OEM plastic hardness specification used in the original application.