Product Description
YH BMW CAS3 CAS4 Test Adapter can test: whether CAS is broken, whether key programming is complete, whether the key frequency is accurate etc.
YH BMW CAS3 CAS4 Test Adapter
CAS adapter functions:
1. Whether CAS program is running normally.
2. Whether CAS data is valid.
3. Whether the key is outputting inductive signal.
4. Whether the key is legal.
YH CAS Tester indicator light meaning:
1. The indicator D2 flashes to indicate that the tester CAN Bus communicates with the CAS module normally.
2. The indicator light D4 is on for a long time, indicating that the CAS module data is valid.
3. Put the key into the induction coil, and the D3 indicator flashes, indicating that the key is outputting LF signal.
4. If the tester beeps, indicating that this key is the valid key of the corresponding CAS module, or the newly programmed key is learned successfully.
Package includes:
1pc x CAS3/4 Test Adapter Host
1pc x CAS3 Interface Board
1pc x CAS4 Interface Board
1pc x 8P Cable
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If you have any questions about the device, the price or the payment, please feel free to contact us.

E-Mail:Sales@carTool.co.uk
Whatsapp: 86-18186167299
Shipping & Delivery
We offer multiple shipping options to meet your needs, with clear timelines and tax policies as follows:
- UK Warehouse Shipping
- Delivery time: 24 to 48 hours
- Key advantage: Tax-free; most items are in stock at our UK warehouses for fast fulfillment.
- EU Warehouse Shipping
- Delivery time: 2 to 5 working days
- Key advantage: Tax-free; most items are in stock at our EU warehouses for fast fulfillment.
- 4PX Express (UK Exclusive)
- Delivery time: 7 to 10 working days
- Key advantage: Tax pre-paid by us; no additional tax or fees upon package arrival.
- Yanwen Express (European Countries)
- Delivery time: 7-15 working days
- Key advantage: IOSS-registered shipment; items declared under 150EUR are tax-paid by us, no extra costs for EU customers.
- DHL Shipping
- Delivery time: 5-7 working days
- Applicable scenario: For items out of stock in the UK/EU warehouse.
- Key note: We will declare a reasonable lower value on the invoice to facilitate customs clearance.
Important Reminder: If you haven’t received your package within the estimated delivery time, please contact us promptly to check the status via online customer service or email: sales@cartool.co.uk.
Technical Support
- For issues such as failed software download from the included CD, or needs for software installation guidance:
- Please send an email to sales@cartool.co.uk. We will provide remote assistance via TeamViewer to resolve your problem efficiently.
