Front Upper Control Arm — Left
OEM Part Number
48630-39055 [Verified]
What It Is
Left-side front upper control arm with integrated ball joint. Mirror of 48610-39085 Front Upper Control Arm Right. Part of the Front Suspension double-wishbone system. The ball joint cannot be replaced separately — if the joint wears, the entire assembly must be replaced [Verified].
Fitment
SC430 (UZZ40) 2001–2010, all model years [Verified]. Also fits GS300/GS400/GS430 (S160 platform) [Probable].
Pricing — OEM
~$479 AUD (April 2026) [Verified]
Aftermarket Alternatives
Same aftermarket options as the right side — see 48610-39085 Front Upper Control Arm Right for full table. Key options:
| Brand | Part Number | Price (April 2026) | Notes | Confidence |
|---|---|---|---|---|
| Moog | RK620336 | ~$128 AUD | Note: verify left-specific Moog number — RK620336 may be right-side only | [Probable] |
| SPC (adjustable) | 72270 | ~$620 USD/pair | Sold as pair — covers both sides | [Probable] |
| Mevotech (adjustable) | CMS861207 | ~$211 AUD each | Reported repackaged SPC | [Reported] |
Where to Buy
- OEM: Lexus dealer, LexusPartsNow.com, Amayama
- Aftermarket: eBay, Amazon, RockAuto, local parts stores
- Adjustable: ShopFIGS.com (FIGS Engineering), RockAuto, Amazon
Related Faults
- Upper Control Arm Ball Joint Wear — primary reason to replace this part
- Factory Camber Tyre Wear — adjustable UCAs are the fix for factory camber wear
Sources
Research data from OEM parts listings and forum threads (April 2026 ingest).