NSK 55ATB0723A02B03 Engine Timing Belt Tensioner

NSK Timing Belt Tensioner for Honda Civic

The NSK 55ATB0723A02B03 engine timing belt tensioner is built for precise belt control in 2002-2005 Honda Civic applications. It combines OE-style fitment with low-friction bearing performance to help maintain stable timing belt tension under daily driving and demanding operating conditions.

Key Features

• Premium OE technology with vehicle-specific fit, form, and performance
• Long-life, low-friction bearing with a superfinished, precision-matched raceway
• Advanced multi-lip seal design for resistance to water and contamination
• Sealed-for-life construction with premium all-weather grease for zero maintenance
• Inside diameter: 10 mm; outside diameter: 55 mm; width: 24 mm

Detailed Description

NSK 55ATB0723A02B03 is an engine timing belt tensioner engineered for the Honda Civic timing system, where consistent belt tension is critical to smooth engine operation and accurate valve timing. NSK’s bearing expertise is reflected in the tensioner’s low-friction design, sealed construction, and contamination-resistant sealing, helping support dependable operation in the engine bay. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Compatible With 2002-2005 Honda Civic timing belt service, this tensioner is a direct-fit service part for owners replacing a worn or noisy unit. The part number 55ATB0723A02B03 is also a useful reference when matching the correct tensioner for Honda Civic maintenance and repair.

What It Helps Address

• Belt noise caused by a worn or rough tensioner bearing
• Inconsistent timing belt tension during engine operation
• Contamination-related wear from moisture, dust, or debris
• Premature tensioner replacement due to seal failure or grease loss
• Timing belt service needs on 2002-2005 Honda Civic models

Installation Notes and Tips

Replace the tensioner during timing belt service and inspect the belt, pulleys, and related components for wear before reassembly. Confirm the application by year and engine configuration before installation. The sealed bearing design of 55ATB0723A02B03 is intended for maintenance-free operation once installed.

Quality Assurance

NSK is recognized globally for rolling bearing engineering and supplies components to major automotive manufacturers and suppliers. The 55ATB0723A02B03 reflects that OE-focused manufacturing approach, with attention to bearing life, sealing, and operating performance in demanding engine environments.