What this page is
For OEM teams sourcing a heavy-truck BCM supplier in China, this page covers the body control modules we make, how they are built and validated, who we make them for, and how to get drawings, samples and a quotation moving within one business day — modules quoted against an OEM specification rather than shipped as a fixed catalogue part.
The information below is the qualification pack we share with engineering teams at the start of a commercial-vehicle body-electronics programme. For the engineering background — what a BCM controls and how to write the specification — see the heavy-truck BCM buyer guide.
Who Youlai is
Changsha Youlai Electronic Technology Co., Ltd. is an IATF 16949 certified OEM electronics manufacturer based in Changsha, Hunan, China. We supply vehicle electronics — body control modules, power distribution, switching, sensors, displays — to commercial-vehicle and construction-machinery OEMs including SANY, XCMG, ZOOMLION, SINOTRUK, YUTONG and BYD. The full named list is on the About page.
The quality system is certified to IATF 16949. For what to ask for in APQP / PPAP and how to verify certificates, see the OEM sourcing guide; environmental and OH&S system certificates (ISO 14001 / ISO 45001) are shared as current PDFs during qualification.
What we make in Body Control
The EBX family covers the body-electrics brain of a commercial vehicle, from heavy-truck 24 V architectures down to 12 V light-commercial cabs. Every model below is a published platform we can build to your OEM specification.
| Model | Role | Supply | Bus / RF | Sealing |
|---|---|---|---|---|
| EBX‑954 | Heavy-truck BCM; 67 inputs, 45 driver outputs | 18–32 VDC | 3 CAN + 1 LIN; ISO 15765 diagnostics | IP54 |
| EBX‑953 | BCM with fuse / relay carrier; ~145 pins | 18–32 VDC | 3 CAN + 1 LIN | IP53 |
| EBX‑2510 | BCM with fuse / relay carrier; 8 configurable analog inputs | 18–36 VDC | CAN 2.0B | IP20 |
| EBX‑952 | Compact central control; RKE, optional app remote | 12 VDC and 24 VDC rated | LIN | IP53 |
| EBX‑2305 | New-energy vehicle BCM with RKE / PKE | 9–16 VDC | 433.92 MHz smart-key receiver | IP5K0 |
| EBX‑2169 | 12 V BCM with integrated PEPS; ~178 pins | 9–16 VDC | 433.92 MHz RF receiver | IP5K0 |
| EBX‑964 | PEPS core controller | 18–32 VDC | CAN to the BCM; 125 kHz LF, 433.92 MHz RF | IP53 |
| EBX‑2162 | Wiper module | 18–32 VDC | CAN; LIN output | IP53 |
| EBX‑2163 | Door and window module | 18–32 VDC | CAN 250 kbps; LIN reserved | IP53 |
| EBX‑2164 | Tractor and trailer lighting module | 18–32 VDC | CAN 250 kbps; LIN reserved | IP53 |
| EBX‑2206 | 12 V anti-pinch window module | 9–16 VDC | CAN | — |
| EBX‑2315 | Window and mirror module; 36-pin | 18–32 VDC | Hard-wired | — |
| EBX‑2313 | Light-truck BCM; 100 pins, 5 connectors | 12 V or 24 V, per programme | 1 CAN + 2 LIN | Per programme |
| EBX‑2405 | Integrated body box: lock, start, turn signals, DRL | 9–36 VDC | — | IP5K2 |
| EBX‑2207 | Central lock and power-step controller | 18–32 VDC | LIN reserved | — |
| EBX‑2208 | Wiper module, 13-pin | 18–32 VDC | — | IP53 |
| EBX‑961 | Wiper, lighting and rain-sensor controller | 18–32 VDC | LIN | IP53 |
| EBX‑962 | BCM I/O expansion; 8 HSD-PWM outputs | 18–32 VDC | CAN | IP65 |
| EBX‑963 | Dump-truck body: cover, gate, lift, PTO | 18–36 VDC | CAN; 433 MHz RF | IP53 |
The other Smart Control Modules, including VCU, PMU and T-BOX, are on the Smart Control Modules overview page.
Lines and test equipment
The Changsha factory runs three SMT lines (solder-paste print, SPI, JUKI placement, multi-zone reflow and AOI), one THT auto-flow line with wave soldering, and four assembly lines. Every assembly line ends in a functional test station. In-circuit testing is done on the ICT station. Annual capacity across the factory is 1.5 million sets.
These rigs belong to the Changsha lab, which validates models across the four product families.
| In-house rig | What it tests |
|---|---|
| Water-spray chamber | IPX water ingress |
| Dust chamber | IP5X / IP6X dust ingress |
| Salt-spray chamber | Accelerated corrosion |
| Temperature and humidity chamber | Programmable temperature and humidity profiling |
| Climate cycling chamber | Long-form humidity and temperature cycling |
| Thermal-shock chamber | Hot–cold step change |
| Aging chamber | Sustained burn-in at elevated temperature |
| Vibration and shock | Multi-axis vibration table; drop and bump |
| ESD generator | ESD immunity per IEC 61000-4-2 |
| ISO 7637 simulator | Supply-line transient immunity |
| Surge generator | Lightning surge immunity |
| Hipot tester | Dielectric withstand and insulation resistance |
| HIL simulation rig | Hardware-in-the-loop vehicle-network simulation |
In-house EMC work is pre-compliance. Formal EMC certification, when a programme requires it, is at accredited third-party laboratories. The quality page has photos of the lines and of the rigs it shows. Dust ingress, vibration and mechanical shock are described on the environmental and EMC page.
How a programme starts
- Briefing. These help if you already have them: target vehicle / platform, expected annual volume, working voltage (12 V / 24 V), pin count, the function list the BCM owns, communication protocol (CAN 2.0 / CAN-FD / J1939), diagnostics (UDS / ISO 15765), IP rating, temperature range and connector preference.
- Selection or custom. We propose the closest standard EBX model. If your program needs a different I/O mix, pin count, software load or sealing, we quote a custom variant on the same EBX platform rather than starting from zero. Where the requirement does not map onto any existing platform, we scope it as a new design instead of forcing a fit.
- Software ownership. We agree early on who writes the application logic and who owns the bus matrix — a configurable software build or a fully custom load. This single decision drives lead time more than any hardware line item.
- Sample & validation. Engineering samples for standard variants, with validation supported by our in-house environmental lab and EMC pre-compliance.
- Mass production. On the lines above, with in-process inspection and traceable batch records. The drawing package, BOM and quality-system documentation are released at the milestones agreed with you. Market compliance paths (UNECE / e-Mark where applicable, SASO/SABER, FCC authorisation, DOT/FMVSS where applicable) available upon project requirement.
Why programmes pick this supplier
- Engineering-led, not catalogue-only. Every EBX model is a project we own end-to-end, from PCB design through harness validation. Custom variants are routine, not an exception.
- Bus integration. The protocol on each CAN channel, commonly the J1939 family on 24 V trucks, is set per programme. See how a BCM sits on the bus in the heavy-truck BCM guide, and how it divides work with the VCU and PMU.
- Full product-family coverage. Buyers consolidating the electronics side of a program get body control, power distribution, switches and sensors, displays and HUD from one supplier — see the four product families.
- Direct contact. Sales mobile +86 134 6767 4786, also on WhatsApp.
Get a quote moving
Email sales@yltronics.com or message us on WhatsApp. Drawings or a BCM specification help if you already have them. Typical reply within one business day. NDA on request.