MAF Senor

[Wizzbit]

Hi i have just found MAF sensors for sale on Eurocarparts website http://www.eurocarparts.com/engine-management-sensor. They have 2 listed both say bosh insert one is £191 the other £118. I have a £40 one fitted at present but it has given the car a nasty flat spot and it seems to be using alot more fuel im only getting 280 miles a tank. I have tried to find one at a scrapy but no joy. Are these ones listed a genuine one or should i be looking some where else. I got quoted £225 at a local car parts store. Cheers in advance for the help