How to Program BMW keys with EWS and CAS IMMO

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How to Program BMW keys with EWS and CAS IMMOMany green hands of auto locksmiths believe that it is difficult to program keys for BMW EWS & CAS IMMO. Here we share a guide on how to program key for BMW EWS and CAS system. After reading, you will get auto key programming skills of unless two BMW models.How to Program key for BMW EWS and CAS IMMO-1You need to have common knowledge of the BMW immobilizer, before starting to program key for BMW. Does it mean that you have the ability to tell which BMW IMMO you meet, EWS or CAS? EWS immobilizer: EWS1,EWS2,EWS3,EWS4 CAS immobilizer: CAS1,CAS2,CAS3,CAS3+,CAS4.How to tell BMW IMMO EWS or CAS?Straight Key with 3 buttons and a blue-white BMW logo on it’s center, just show below:We divide them based on years:EWS IMMO: Straight remote key of 3 series,5 series, and 7 series of 2000-2004 model. Below is the immobilizer box.How to Program key for BMW EWS and CAS IMMO-3CAS2 IMMO: 3 series,5 series,Z4,X5 and X3 equiped CAS2 immobilizer system.Below shows the CAS2 and CAS3 immobilizer box.How to Program key for BMW EWS and CAS IMMO-4Another type of BMW straight key is similar to Land Rover which has a black BMW logo on it. It also belongs to the CAS IMMO system. Usually, the older BMW 7 series is equipped with a BMW CAS1 immobilizer system. Usually, BMW 3 series and 5 series before 2010 are equipped with a BMW CAS3 immobilizer system. Usually BMW 3 series 2010– is equipped with a BMW CAS3+ immobilizer system. And BMW 1 series after 2011 is equipped with a BMW CAS4 immobilizer system.How to Program key for BMW EWS and CAS IMMO-5How can we confirm the CAS system?If it needs to plug the smart card into the card slot, then press on-key-start.You can make sure it belongs to the CAS immobilizer, and usually, it is CAS3. The key of CAS2 Immo is a straight key. For example: BMW 5 series 09. We can confirm it belongs to the CAS3 immobilizer.Which device can do the BMW key program?Here I introduce some BMW key programmers: AK90 Key Programmer AK300 Key Programmer BMW OBD2 Key ProgrammerHere also we take the BMW Obd2 multitool as an example:How to Program key for BMW EWS and CAS IMMO-6BMW OBD2 Multi-tool is mainly applied to CAS3 and CAS3+. If you need to program for BMW CAS1, you can use the BMW OBD2 Multi-tool write key function to program the key. There are no devices to program BMW CAS2 in no need for disassembling, you must remove the CAS module from the car to read out data. After reading out the data, you can use the BMW multi-tool to program the key.There are two ways to program the key for BMW if you use the BMW OBD2 Multi-tool. Use a file to program the key directly offline. Programing key by OBD port online.Method 1: Offline program BMW keyIn this method, you do not need to connect the BMW Multi-tool to the car. But you need to read out the data file from CAS already.For example, if you want to program the key for the CAS2 immobilizer, you need to use R270 to read out data.Then, open the BMW Multi tool software on your computer.Select the “data file generate key” function, then upload the data read out by the R270 key programmer.Put the new key into the coil of the BMW Multi tool.Select “CAS2” on the software, and click to generate the key.How to Program key for BMW EWS and CAS IMMO-7Method 2: Online Programming.Connect your car to compete with the BMW Multi tool via the OBD port.Read out EEPROM data, and save it on your computer.Select the key learn function, and you will see below the software interface and some buttons.“Generate dealer key- use programmer” means program key by BMW Multi too coi.l“Generate dealer key-use ignition switch” means program key by the ignition switch.Here we recommend using the programmer: BMW Multi tool coil to program the key.How to Program key for BMW EWS and CAS IMMO-8Click to get key information, it will show the key information. We need to select one of the key positions to generate the key. Usually, we choose one of position 3, position 4, or position 5 to generate a new key. After selecting a key position, you new key into the BMW multi-tool coil, then select “Generate dealer key-use by programmer”After that, the software shows a dialog box as above picture. We select the first option “Add key ”, then click the next step.It will remind you dealer key has been generated successfully. Now you can try this new key on your car.Conclusion: Only click the 5 buttons to program the BMW key with the BMW Multi tool. Click to read out EEPROM data. Save the data file on your computer. Select the key to learn function to get key information. Select the key position we need to generate the key. Click “Generate dealer key–use programmer”.In some situations, the new dealer key you program can not work on your car. Here, you need to do this operation:Back to the software main interface to click the button “synchronize DEM to CAS”.The way to program the key for the BMW EWS IMMO system is the same as the CAS IMMO system. You can use AD900 to program the key, but you need to use the R270 Programmer to read out data before.

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