I attempted to get my 2004 R53 EWS repaired with ECU Pro. It was a failure. Details: The car would not start with existing key that contained a new battery. Sent in Key, EWS, and computer for motor. I followed all instructions. After 2 weeks I called as I had not heard anything. The lady that answered with super polite and helpful...she shared that the team was behind, but was get to my parts in a few days. No issue for me...progress. I received a note saying that my key was the issue and that it would be fixed...I was given the option to purchase another key and I did. Paid additional fee and got parts back. Plugged in all parts and again followed all instructions and car is doing the same thing...not starting. I have confirmed that 12.6 volts is at the EWS when trying to start the car. Confirmed starter is good...power is not getting to solenoid. I am out $299, shipping, and the cost of a new key. The note I got back now claims that to get further testing done it is $75.00. I am going to pass and pursue other options. Because I have used these guys twice and got the same outcome. I would recommend another vendor. If I find there is another issue, I will review again and change review; however, right now, I am not pleased.