Help restore precise wheel location and smooth steering with the Delphi control arm and ball joint assembly, MPN TC1812. This front left upper forward unit is a direct-fit replacement for many vehicles, among them the 2007-2009 Audi S8, 2006-2010 Audi A6 and 2005-2010 Audi A6 Quattro — see the Buyer's Guide tab for the full list and engine-level fitment.
Delphi applies its OE steering expertise to this aftermarket assembly and tests to the extreme: parts withstand temperatures below -40°C and over 120°C and endure 720 hours of salt spray, backed by extensive dimensional and material analysis for close OE-to-aftermarket compatibility.
- Verified materials: 100% crack detection and ultrasonic flaw detection confirm the materials match OE specifications.
- Precision ball studs: studs machined to micron tolerances for durability and smooth joint operation.
- Robot-welded: welding delivers consistent performance and quality.
- Anti-corrosion protection: applied to each part for corrosion prevention and enhanced aesthetics.
The control arm locates the wheel and pivots with suspension travel, while the integrated ball joint lets the steering and suspension articulate. Signs the original may need replacing include clunking over uneven pavement, wandering steering, or uneven tire wear; if a failed control arm or ball joint is the cause, this assembly replaces it.
Interchange: 4E0 407 505 B · 4E0 407 505 E · 101-5966 · 102-5966 · AD-H103 · 520-993 · 4E0 407 505 D · 4E0 407 505 F · 502-1191
4E0407505B · 4E0407505E · 1015966 · 1025966 · ADH103 · 520993 · 4E0407505D · 4E0407505F · 5021191 · KSC4321 · CB12037 · CB12037PR · CK620618 · K620618 · RK620618 · FA4894 · CMS70109 · GS70109 · MS70109 · JTC1136
This part cross-references / interchanges with the following part numbers:
4E0 407 505 B, 4E0 407 505 E, 101-5966, 102-5966, AD-H103, 520-993, KSC4321, CB12037, CB12037PR, CK620618, K620618, RK620618, 4E0 407 505 D, 4E0 407 505 F, FA4894, CMS70109, GS70109, MS70109, 502-1191, JTC1136
