Delphi TC4729 Suspension Control Arm and Ball Joint Assembly - Front Left Upper
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Delphi

Delphi TC4729 Suspension Control Arm and Ball Joint Assembly - Front Left Upper

Brand Delphi TC4729
Position Front Left Upper
Fits Mazda · 7 vehicles

OE expertise. Applied to aftermarket steering parts for OE performance and compatibility.

Extreme testing. Withstands temperatures below -40°C, above 120°C, and 720 hours of salt spray.

Suspension control arm. A combined control arm and ball joint assembly for the suspension system.

Cross-references Dorman - OE Solutions 522-957, Mevotech Supreme CMS801138 and MOOG Chassis Products RK622750 for the same application. See all 5.

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Front Left Upper Control Arm for Mazda Miata

Delphi TC4729 is a front left upper suspension control arm and ball joint assembly for 1991-1997 Mazda Miata models. It is built for direct replacement use where precise suspension geometry and OE-style fit are important.

Key Features

  • Front left upper position for Mazda Miata applications
  • Suspension control arm and ball joint assembly
  • OE-focused dimensional and material analysis for fit consistency
  • Tested for temperature extremes from below -40 C to over 120 C
  • Exposed to 720 hours of salt spray during validation
  • Delphi OE expertise applied to the aftermarket steering and suspension portfolio

Detailed Description

Delphi TC4729 is engineered for the front left upper location on 1991-1997 Mazda Miata vehicles. This assembly supports suspension articulation and steering response while helping maintain the original alignment geometry expected in a Mazda Miata front suspension service repair. Delphi applies OE-based design knowledge and extensive dimensional and material analysis to improve part-to-vehicle compatibility. This part cross-references MOOG Chassis Products RK622750 for the same application.

Common Repair Uses

  • Restoring worn upper control arm and ball joint function
  • Addressing looseness or play in the front left suspension
  • Correcting uneven tire wear linked to suspension wear
  • Reducing clunks, squeaks, or instability from a fatigued front suspension joint
  • Replacing a damaged front left upper control arm on a Mazda Miata

Installation Notes and Tips

Fits 1991-1997 Mazda Miata, front left upper. Verify alignment after installation and inspect related suspension components, bushings, and fasteners before returning the vehicle to service. Confirm the part number TC4729 and match the vehicle position before ordering or installation.

Quality Assurance

Delphi validates this suspension component through temperature cycling and extended corrosion exposure testing to support OE-level performance expectations. The brand’s OE safety technology and aftermarket engineering are applied to help maintain consistent fit and durability in service.

Related reading

This part fits 7 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
1997MazdaMiataFront Left Upper—
1996MazdaMiataFront Left Upper—
1995MazdaMiataFront Left Upper—
1994MazdaMiataFront Left Upper—
1993MazdaMiataFront Left Upper—
1992MazdaMiataFront Left Upper—
1991MazdaMiataFront Left Upper—
Directly replaces or cross-references 5 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Dorman - OE Solutions — 522-957Mevotech Supreme — CMS801138MOOG Chassis Products — RK622750NA23-34-250NA23-34-250A