Humanoid BOM Cost Breakdown
Where actuators and reducers sit in the teardown.
News · Supply Chain
Tesla Audits China Suppliers for Optimus Gen 3 Ramp — Tuopu, Sanhua, Joyson Visited
Tesla's Optimus team landed in Ningbo on September 16 and began a new round of mass-production audits the next day. The Yangtze River Delta sweep targets the third-generation Optimus — its first designed for volume — and the companies visited already hold orders.
A Tesla Optimus engineering and manufacturing team arrived in Ningbo on September 16 and began a new round of supplier audits on September 17, according to multiple Chinese supply-chain reports (21st Century Business Herald, Securities Times, Shanghai Securities News) picked up by Bloomberg, TrendForce and the South China Morning Post. The sweep covers the Yangtze River Delta — Ningbo, Hangzhou, Shanghai and Xiamen — and runs through October.
The companies named are all established Tesla automotive suppliers now pivoting into robot parts:
- Tuopu Group (拓普集团, Ningbo) — chassis maker; supplies actuator assemblies, joint modules and dexterous-hand drive parts, reported as the near-exclusive supplier of linear-rotary actuators.
- Sanhua Intelligent Controls (三花智控, Hangzhou) — thermal-management leader; supplies rotary actuators covering roughly 14 rotating joints (shoulder, wrist), with reported orders around RMB 1.2B and over 70% of the actuator content.
- Ningbo Joyson Electronic (均胜电子) — interior/electronics supplier; thermal and structural content.
What it means
These are not new-design awards — the suppliers already held Optimus orders before the audit. The audit verifies production-line quality, compliance and consistency, helps with equipment commissioning, and transfers US-style manufacturing know-how. Suppliers that pass are expected to begin production "very soon." TrendForce frames the round as the ramp-up of Optimus Gen 3, the first model designed for volume, targeting a roughly $20,000 price point. Separately, local reports say Tesla plans to build about 50,000 Optimus units this year for deployment across its global gigafactories, not yet for consumer sale.
These are not new-design awards — the suppliers already held Optimus orders before the audit. The audit verifies production-line quality, compliance and consistency, helps with equipment commissioning, and transfers US-style manufacturing know-how. Suppliers that pass are expected to begin production "very soon." TrendForce frames the round as the ramp-up of Optimus Gen 3, the first model designed for volume, targeting a roughly $20,000 price point. Separately, local reports say Tesla plans to build about 50,000 Optimus units this year for deployment across its global gigafactories, not yet for consumer sale.
Why this round matters
Optimus Gen 3 is the first Tesla humanoid designed for manufacturability, with an upgraded dexterous hand. The audit's explicit goals are exclusivity and consistency of supply, plus hands-on line setup — a classic step from prototype to repeatable manufacturing. It also confirms that Tesla's volume robot will lean heavily on China's existing EV supply base: the same companies that make seats, chassis and thermal systems for Tesla cars are now its actuator and structure suppliers. That mirrors our humanoid BOM breakdown, where actuators and motors dominate cost.
Beyond the Ningbo trio, Leaderdrive / Green Harmonic (绿的谐波) has already passed Tesla verification and supplies harmonic reducers to Tesla's Mexico plant, while screw and actuator specialists such as Shijian Transmission are also reported in the supplier pool.
Sources: 21st Century Business Herald; Securities Times; Shanghai Securities News; TrendForce (Sep 21, 2026); South China Morning Post; Bloomberg. Figures are supply-chain reports, not Tesla-confirmed.
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