Front Steering Knuckle - Right
- Mfg Part #
- 8K0407254AA 8K0407254AA
- ECS Part #
- ES#5529541
- Brand
-
Product Details
On the Audi B8 five-link front suspension, the lightweight aluminum steering knuckle (wheel bearing housing) serves as the structural upright for the front corner, housing the 90mm hub bearing and anchoring the tie rod end, lower control arms, and dual upper links. Part number URO-024304 (OE 8K0407254AA) is the direct replacement for the front right (passenger side) spindle, matching the left-side counterpart URO-024303.
During suspension work, the steel upper pinch bolt commonly seizes within the aluminum upright, frequently resulting in snapped bolts or damaged casting ears during removal. Furthermore, severe pothole strikes or curb impacts can bend the knuckle neck, causing uncorrectable camber and caster alignment errors.
Important KSM vs. Cobapress Casting Split:
Audi utilized two different casting suppliers for B8 knuckles: KSM and Cobapress. Audi also upgraded the lower ball joint taper size from M12 to M14 on November 1, 2009. Part number 8K0407254AA corresponds strictly to the KSM variant (stamped "KSM" directly into the casting) with the M14 lower ball joint seat. Verify whether your existing casting is stamped KSM or Cobapress prior to ordering.
Features & Specs:
Direct OE-Specification Replacement: Precision-machined to factory dimensions, taper seats, and 90mm wheel bearing bore specs.
Cast Aluminum Alloy: Matches OEM tensile strength and unsprung suspension mass.
Solves Geometry & Seizure Issues: Direct fix for bent knuckles or stripped/broken upper pinch bolt ears.
Corrosion-Resistant Surface: Treated to withstand winter de-icing chemicals and road spray.
Note: Front wheel bearing assembly (8K0498625A), ABS sensor (WHT003856), upper pinch bolt/nut hardware, and control arms are sold separately.
- URO-024304
- 8K0407254AA
This Part Fits the Following Vehicles
| Make | Model | Submodel | Engine | Special Fitment Notes |
|---|---|---|---|---|
| Audi | B8 A4 | FWD | 2.0T | Use vehicle selector to confirm fitment |
| Audi | B8 A4 | Quattro | 2.0T | Use vehicle selector to confirm fitment |
| Audi | B8 A4 | Quattro | V6 3.2L | Use vehicle selector to confirm fitment |
| Audi | B8 A5 | Quattro | 2.0T | Use vehicle selector to confirm fitment |
| Audi | B8 A5 | Quattro | V6 3.2L | Use vehicle selector to confirm fitment |
| Audi | B8 Allroad | Quattro | 2.0T | Use vehicle selector to confirm fitment |
| Audi | B8 S4 | Quattro | 3.0T | Use vehicle selector to confirm fitment |
| Audi | B8 S5 | Quattro | 3.0T Cabriolet | Use vehicle selector to confirm fitment |
| Audi | B8 S5 | Quattro | 3.0T Coupe | Use vehicle selector to confirm fitment |
| Audi | B8 S5 | Quattro | V8 4.2L | Use vehicle selector to confirm fitment |
| Audi | Q5 | Quattro | 2.0T | Use vehicle selector to confirm fitment |
| Audi | Q5 | Quattro | 3.0 TDI | Use vehicle selector to confirm fitment |
| Audi | Q5 | Quattro | 3.0T | Use vehicle selector to confirm fitment |
| Audi | Q5 | Quattro | 3.2L | Use vehicle selector to confirm fitment |
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Items marked with a 'Free Shipping On Orders $49 and Up' logo may qualify for free standard economy ground shipping to the contiguous United States (48 states) for most orders with a value greater or equal to $49.00 USD. Oversized products and direct ship products are excluded from this offer unless otherwise noted.
Free Shipping
Items marked as 'Free Shipping' may qualify for free standard economy ground shipping to the contiguous United States (48 states). Oversized products and direct ship products are excluded from this offer unless otherwise noted.
The policies listed above are subject to change at any time without notice.
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At ECS Tuning, we understand that plans can change. That's why we offer a flexible cancellation policy for our customers. You may cancel your order at any time before you receive the shipment confirmation. This policy is designed to provide you with peace of mind and the flexibility to make adjustments to your purchases as needed. Should you decide to cancel your order, simply reach out to our customer service team, and we will assist you with the process swiftly and efficiently.
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