Litens 999421A Automatic Serpentine Belt Tensioner

The Litens 999421A is an automatic serpentine belt tensioner designed specifically for Toyota and Lexus vehicles with 4.7L engines. Manufactured by one of the world's largest original equipment suppliers, this tensioner maintains the original form, fit, and function specifications while providing reliable performance and durability.

Key Features:

• Heavy-duty steel pulley with close tolerance ball bearing pocket for extended service life
• Internal round spring technology provides constant belt tension and alignment throughout its service life
• Electro-deposited coating for superior corrosion resistance
• Meets all original equipment specifications for proper form, fit, and performance
• Made in Canada with OE-quality construction
• Installation instructions included

This tensioner is engineered to automatically adjust for belt stretch and wear, ensuring your serpentine belt remains properly tensioned for optimal accessory drive performance. The robust torsion spring design enhances alignment and longevity compared to flat wire tensioners, while the precision ball bearing pocket ensures smooth, quiet operation.