At 16 years it has done well.. dont expect the same service from the replacement. They are not built to last these days. Not unless you go for a Miele...sit down before you look at the prices.
The cost of getting someone to look at it will be close to £100 for a call out, plus parts and another visit to fit the parts.
Possibly time to bite the bullet and put the £100 towards a new one.
Bosch tend to come with a 2 year warranty and can be picked up for approx £250 from Currys and John lewis at the moment.