Why is my car down on power since its MoT?

Why is my Mazda 6 short on power since recent a MoT?

Is a broken tailgate an MoT failure?

I have a Hyundai i30 and the tailgate door wont open on the outside but does from inside. Is this an MOT failure?

I bought a secondhand car two months ago - is the seller responsible for fixing its faults?

My dad purchased me a 2009 MINI about two months ago, in which time I've done 2000 miles. When the car went for it's MoT, it passed with a minor refusal for headlight bulb but was advised an engine management...

Will my car fail the MoT due to broken front fog light?

The nearside front fog light on my 2013 Vauxhall Corsa doesn't work, I have changed the bulb but still not working, will my car fail its MoT because of this?