MAS Chassis IS421 Front Inner Tie Rod End

The MAS Chassis IS421 is a front inner tie rod end designed to restore precise steering control and eliminate steering looseness, wander, and uneven tire wear. This inner tie rod end connects the steering rack to the front wheel assembly through the steering knuckle, translating steering input into wheel movement for responsive handling.

Key Features:

• Direct OE replacement design for reliable fit and performance
• Heat-treated components for enhanced durability and fatigue resistance
• Precision-engineered to restore proper steering alignment
• Anti-corrosion surface treatment for extended service life
• Wrench flats on housing and stud for easy installation and alignment adjustment

Inner tie rod ends are critical steering components subject to wear from normal driving conditions, potholes, and road hazards. Worn tie rod ends can cause symptoms including excessive tire wear, steering vibration, loose steering feel, and clunking noises from the front end. Since the outer tie rod must be removed to replace the inner tie rod, it's recommended to replace both inner and outer tie rods together to save time and prevent future issues.

Cross-Reference Numbers: EV421, MEV421, ES4131, 269-5555, 1L2Z3280CA, 45A2137