The Yanhua Mini ACDP Module 1 is a professional-grade, solder-free hardware solution engineered for reading, writing, and cloning BMW CAS1, CAS2, CAS3, CAS3+, CAS4, and CAS4+ immobiliser modules. By utilising specialised interface boards with spring-loaded contact probes, it eliminates the need to desolder microcontrollers, cut PCB traces, or lift delicate pins.
The Ultimate Solderless BMW CAS Key Programming Solution
For professional automotive locksmiths, vehicle remappers, and diagnostic specialists, interacting with BMW Car Access System (CAS) modules has traditionally been a high-stress, high-precision task. Standard micro-soldering techniques require physical alterations to multi-layered circuit boards, introducing immediate risk of permanent data loss or thermal shock.
The Yanhua Mini ACDP Module 1 completely eliminates this risk by introducing a solderless mechanical interface. Using precision-engineered test-point boards, the kit creates a reliable mechanical connection directly to the board’s debug test ports, revolutionising how workshops manage immobiliser data and key programming procedures.
The Science of Solder-Free ICP (In-Circuit Programming)
When communicating with Motorola micro controllers like the S12DXP512 (powering CAS3 and CAS3+) or the highly secure S12XEP100 (found in CAS4 and CAS4+ systems), conventional tools demand that you lift physical pins or cut communication traces on the PCB to isolate the MCU’s lines from the rest of the board’s electronic components.
Yanhua’s patented In-Circuit Programming (ICP) solution resolves this by employing custom-moulded alignment boards configured with industrial spring-loaded contact probes (pogo-pins). These pins compress directly onto factory-engineered test pads on the CAS PCB. By establishing an automated electrical handshake, the software calculates real-time resistance and line continuity before introducing writing voltage. If oxidation, varnish, or dust is detected, the system immediately halts execution, completely safeguarding the vehicle’s master immobiliser file against corruption.
Key Features & Workshop Benefits
Solder-Free & Zero Physical Modifications
No lifting MCU pins, cutting PCB tracks, or removing SMD resistors. This prevents permanent board failure and significantly accelerates turnaround times.
Pin Connection Intelligent Detection
Integrated hardware sweeps confirm valid physical contact across every pogo-pin before initiating communication protocols, eliminating communication dropouts mid-read.
Data Restoration & Diagnostics
Allows full access to modify operating frequencies, synchronise VINs, swap and clone modules, perform OBD restoration, or write custom EEPROM and FLASH dumps.
Comprehensive BMW CAS Coverage
Full support for classic CAS1 and CAS2, CAS3 through to the late CAS3+/CAS3++, and security-hardened F-Series CAS4/CAS4+ architectures.
Technical Specifications
| Parameter | Specification Details |
|---|---|
| MCU Families Supported | Motorola S12DXP512 (CAS3 series) & S12XEP100 (CAS4 series) |
| Immobiliser Systems | BMW, BMW Motorrad & Mini Cooper: CAS1, CAS2, CAS3, CAS3+, CAS3++, CAS4, CAS4+ |
| Access Methods | OBD-II Port (IMMO operations & basic sync) / ICP Bench Mode (Secure EEPROM/FLASH extraction) |
| Platform Compatibility | Works in tandem with Yanhua Mini ACDP-1 and ACDP-2 Master Programmers |
| Software Licenses Included | A500 (BMW CAS1-CAS4+ IMMO), A510, A515, A516 |
| Supported OS Interfaces | iOS, Android, and PC (Windows) via the unified ACDP Application |
What is Included in the Box?
The Module 1 expansion kit contains all high-precision interfaces required to complete bench-level CAS configurations safely:
- BDM01 Adapter: The core hardware interface and decryptor board.
- BDM-ICP Cable: Multi-channel ribbon cable connecting the adapter to individual interface boards.
- BMW-CAS3 Interface Board: Molded board configured with contact probes matching CAS3/CAS3+ test pads.
- BMW-CAS4 Interface Board: Molded board configured with contact probes matching CAS4/CAS4+ test pads.
- BMW-CAS4 Interface Board Buckle: A mechanical retention clamp to lock the interface board tightly onto the PCB.
- CAS3/CAS4 Copper Pillar Package: Threaded alignment pillars to provide stable, level mounting.
Why Buy from Mobile Eco Tuning?
At Mobile Eco Tuning, we are far more than an online retailer. From our state-of-the-art diagnostic and tuning headquarters in the UK, our active engineering team uses this exact Yanhua Mini ACDP ecosystem daily to program transponder keys, clone corrupted ECUs, and reset immobiliser systems on customer vehicles.
We maintain a direct, collaborative relationship with Yanhua’s development team. This means that every unit we ship is 100% genuine hardware, backed by official technical updates, warranty assistance, and professional post-purchase support from technicians who use these tools in real-world environments across our UK-wide network of over 800 agents.
💡 Mobile Eco Tuning Pro Tip:
Always clean the CAS circuit board with a soft nylon brush and high-purity Isopropyl Alcohol (IPA) before aligning the interface boards. Conformal coatings or grime on the test pads can interfere with the intelligent pin detection test. Never skip the pin-test step in the ACDP app; wait for all green indicators to illuminate before selecting “Read EEPROM” or “Read P-Flash”. Note: This requires an active ACDP Basic Module to function. For “All Keys Lost” programming on F-series CAS4 systems, you will also require ACDP Module 3 (ISN Reading) to extract the DME ISN security code.
