NSK 52TB2803B01 Engine Timing Belt Tensioner

NSK Timing Belt Tensioner for OE-Style Service

The NSK 52TB2803B01 engine timing belt tensioner is built for precise belt control in timing belt service applications. It combines vehicle-specific fitment with low-friction bearing construction to support stable operation in demanding engine environments.

Compatible with select Kia Sportage, Mazda B2200, Ford Probe, Mazda 626, and Mazda MX-6 applications, this tensioner is a direct-fit service part for timing system maintenance. The NSK 52TB2803B01 is engineered for consistent belt tension, contamination resistance, and long service life.

Key Features

• Premium OE technology with vehicle-specific fit, form, and performance
• Superfinished precision-matched bearing raceway for low-friction operation
• Advanced multi-lip seal design for resistance to water and contamination
• Sealed-for-life construction with premium all-weather grease
• Inside diameter: 29 mm
• Outside diameter: 52 mm
• Outer race width: 28.5 mm

Detailed Description

NSK is known for advanced rolling bearing engineering and supplies components to major automotive manufacturers and suppliers worldwide. The 52TB2803B01 timing belt tensioner reflects that background with a sealed bearing design intended to maintain smooth belt tracking and reduce friction under heat, vibration, and contamination exposure. It is a practical OE-style replacement for timing belt service on 1995-2002 Kia Sportage, 1987-1993 Mazda B2200, 1989-1992 Ford Probe, 1988-1992 Mazda 626, and 1988-1992 Mazda MX-6 applications. This part number, 52TB2803B01, is built for engines that rely on accurate belt tension to keep valve timing stable.

What It Helps Address

• Timing belt slack or inconsistent belt tension
• Belt noise caused by worn tensioner bearings
• Premature timing belt wear from rough pulley movement
• Contamination-related bearing wear from moisture or debris
• Service issues during timing belt replacement on Kia Sportage and Mazda applications

Installation Notes and Tips

Replace the tensioner during timing belt service and inspect the belt, idlers, and related pulleys at the same time. Confirm engine code and application details before installation, since timing components must match the exact vehicle configuration. For best results, follow factory torque specifications and timing procedures, and verify smooth pulley rotation before closing the timing cover. The NSK 52TB2803B01 should be installed on the correct application listed for 1995-2002 Kia Sportage, 1987-1993 Mazda B2200, 1989-1992 Ford Probe, 1988-1992 Mazda 626, and 1988-1992 Mazda MX-6.

Quality Assurance

NSK manufactures this tensioner using bearing-focused OE engineering and sealed bearing construction for dependable service in engine timing systems. The design emphasizes low friction, contamination resistance, and long-life operation for routine maintenance on the listed vehicles.