Moog K90493 Front Lower Ball Joint for 2002-2004 Acura RSX/2002-2005 Civic Si

Vehicle Fitment

• 2002-2004 Acura RSX (All Trims, 2.0L I4, FWD)
• 2002-2005 Honda Civic Si (Hatchback, 2.0L I4, FWD)

Fitment Notes

• Honda Civic fitment is restricted to the Si Hatchback body style only; does not fit Civic Sedan, Coupe, DX, LX, EX, or GX trims
• Does not fit 2005 or later Acura RSX
• Sold individually - purchase two (2) units to replace both front lower ball joints

Features

• Improved follower ball joint design extends product life and simplifies installation compared to OE
• Heat-treated ball studs meet or exceed OE strength requirements to resist premature failure and fatigue
• Greaseable socket design allows fresh lubricant to flush out contaminants, reducing corrosion and wear
• Belleville preload washer keeps the bearing package tight as bearings wear, absorbing impact loads
• Patented pressed-in cover plate seals out debris, minimizes looseness, and reduces bearing wear for extended service life
• Powdered-metal gusher bearing allows grease to fully penetrate bearing surfaces for reduced friction and enhanced strength
• One-piece forged housing delivers maximum durability and structural integrity under load
• Full-ball hardened stud provides consistent 360-degree stud articulation throughout the life of the part
• Premium polychloroprene dust boot with grease-relief valve prevents contamination ingress
• Precision-machined tolerances ensure direct-fit installation and correct steering alignment right out of the box

Specifications

• Position: Front Lower
• Fitment Type: Direct Fit / Press-In (Non-Adjustable)
• Drivetrain: FWD
• OE Cross References: 51210S5TZ00, 51210S6FE01, 51210S6M010, 51215S5TZ00, 51215S6FE01, 51215S6M010
• Warranty: MOOG Limited Lifetime Warranty
• UPC: 080066324371
• Shipping Weight: 0.88 lbs

Included Components

• 1x Front Lower Press-In Ball Joint
• 1x Pre-installed Polychloroprene Dust Boot

Product Description

The Moog K90493 is a front lower press-in ball joint engineered as a direct OE replacement for the 2002-2004 Acura RSX and the 2002-2005 Honda Civic Si Hatchback. Ball joints serve as the pivoting connection between the suspension control arm and the steering knuckle, allowing controlled wheel movement during cornering, braking, and road irregularities. Over time, OE ball joints wear out, leading to symptoms such as clunking noises, loose steering feel, uneven tire wear, and compromised vehicle alignment - all of which this Moog unit is designed to fully resolve.

What sets the K90493 apart from standard replacements is Moog's suite of problem-solving innovations. The powdered-metal gusher bearing allows grease to flow continuously through the bearing and onto the ball stud, dramatically reducing friction and slowing wear. A Belleville preload washer maintains consistent socket tension as components wear, while the patented pressed-in cover plate locks out dirt and debris that would otherwise accelerate deterioration. The one-piece forged housing and heat-treated stud together provide the structural integrity needed to handle daily driving demands and spirited use alike.

Installation is straightforward for any technician familiar with Honda K-series platform suspension. The K90493 uses a press-in design compatible with standard shop press equipment and replaces multiple OE Honda part numbers including 51210S5TZ00 and 51210S6M010. Note that for the Honda Civic, this ball joint fits the Si Hatchback configuration only - it does not fit Sedan, Coupe, or other trim levels such as DX, LX, EX, or GX. This unit is sold individually; two are required for a complete front axle ball joint replacement. Backed by Moog's Limited Lifetime Warranty, the K90493 is the ideal choice for restoring like-new steering precision and suspension confidence.