GMB 425-9390 Engine Timing Belt Idler - Lower

Engine Timing Belt Idler for Ford and Mazda Applications

The GMB 425-9390 engine timing belt idler is manufactured to meet or exceed OEM specifications for dependable timing system service. It is built with a metal pulley and a single groove design for applications that require a lower timing belt idler in the engine valve train.

Compatible with select Ford, Mercury, and Mazda models, including Ford Escape, Ford Focus, and Mazda Tribute applications, this part supports proper belt routing and stable operation in the timing drive system.

Key Features

• Engine timing belt idler for valve train service
• Metal pulley construction for durability
• Single-groove pulley design
• Serpentine and V-belt pulley type
• Built to meet or exceed OEM specifications
• GMB 425-9390 replacement part number for direct lookup

Detailed Description

The GMB 425-9390 is an engine timing belt idler designed for lower-position applications in the timing system. Its metal pulley construction and single-groove profile help maintain consistent belt tracking where precise alignment matters. This part is a practical OE-style replacement for vehicles that require a timing belt idler in the lower engine position, including Ford Escape, Ford Focus, and Mazda Tribute models.

This part cross-references Gates T42034 for the same application. The GMB 425-9390 also cross-references 4259390 and F8CZ6M250BA for additional catalog matching.

What This Part Helps Address

• Worn or noisy timing belt idler pulley
• Improper belt tracking in the lower timing drive
• Timing system service on Ford Focus and Ford Escape applications
• Replacement needs for Mazda Tribute and Mercury Cougar lower-position idlers
• Fitment-specific repair on Ford Escort, Contour, and Mercury Mystique models

Installation Notes and Tips

Verify the lower mounting position and compare the existing pulley style, groove count, and belt type before installation. Confirm vehicle year, make, and model against the listed fitment for Ford Escape 2001-2004, Ford Focus 2000-2004, Mazda Tribute 2001-2004, Ford Escort 1998-2003, Mercury Cougar 1999-2002, Ford Contour 1998-2000, and Mercury Mystique 1998-2000. Proper timing system alignment is important during service, so inspect related components before reassembly.

Quality Assurance

GMB manufactures this timing belt idler to meet or exceed OEM specifications, supporting consistent fit and function for the listed applications.