There are a number of appliances which now come with a 5 year guarantee, however I was looking at buying a new dishwasher and found this.
Guarantee info " http://www.smeguk.com/GuaranteeOffers.htm
The Smeg DF612WE Dishwasher comes in a stylish white colour. The DF612WE has an efficient A energy rating. This Dishwasher has 12 place settings and benefits from 5 programmes.
The DF612WE has been rated A rated for wash performance and A rated for drying performance. To offer peace of mind the Smeg DF612WE free standing Dishwasher also comes with 5 years warranty.