Bosch say that, "According to internationally recognised risk assessment methodology, which takes into account the likelihood of various factors that would contribute to a potential fire, the risk is deemed low." However, anyone that has their kitchen or home going up in flames probably won't agree so if you have an affected model please have it checked as soon as possible as Bosch do go onto to say that, "There is a possibility that a fire could break out in the control panel. If unattended, the fire could potentially apread beyond the dishwasher. If you have one of the affected models, please call the helpline at 0800 561 0082 or arrange a callback with BSH customer service immediately to schedule a free repair."
So, low risk but don't use it or it could burst into flames as several appear to have done already.
The official notice from Bosch read as follows:
BSH Home Appliances Limited has announced an in-home repair programme of certain dishwashers manufactured between 1999 and early 2005. The affected dishwashers are in the batch number range from FD 7901 to FD 8504.
Dishwashers which are outside the above batch number range are not affected.
To find out if your dishwasher is included in this repair action
Please enter the model number and batch number which can be found either engraved on the top or on a sticker on the left hand side of the inner part of the door
You can find the model and FD number as shown below on the rating plate of the dishwasher and the information can be entered on the Bosch Repair Action website from this link.