Do you have a MX5 MK2 or MK2.5 1998 - 2005, 1.6 or 1.8 with an intermittent non start problem?
Perhaps you need a working immobiliser?

More and more of the original MK2.5 TRW(ex Lucas) factory immobilisers, marked TRW 36AS and MK2 Lucas 19AS immobilisers are failing. It may begin with an uncharacteristic non start that does not recur for a month or more but is a sign that the immobiliser is starting to fail. The situation will get worse and finally the car will not start at all. No new immobilisers available. We have developed an emulator that replaces the immobiliser and that is listed here but you may require a working immobiliser and I am in a position to facilitate that and offer a Six Month Guarantee. 

Please make sure your immobiliser is marked DC69 67 5G2A/B, TRW 36AS for MK2.5 or GE4T/NC30 67 5G2 Lucas 19AS for MK2. I will require your ECU and keys because the new immobiliser will need to be programmed to these. I will test the compatibility/security function, so you will just need to fit these parts and no need to replace the ignition and locks.  

I like to be able to guarantee that a replacement immobiliser will resolve your problem, so encourage you to scroll down this listing to the seller Business Information and contact me prior to purchase. I will take you through the necessary tests that will facilitate a confident diagnosis of your problem and a guarantee that the replacement immobiliser will resolve the issue completely or a refund.