Don't know about Nissans, but if Pugs are anything to go by, the replacement part may cost £100 or more. Garage costs are usually about labour, so it sounds like an hour or so there.

If you are happy about finding the way to take off the door card without damaging it, then replacing the part should be plug-and-play. A manual might advise disconnecting the battery while doing it, tho I guess removing the correct fuse would be simpler. And there may be a rainproof membrane to mend afterwards ....

You probably don't need to visit a breaker's, as parts like this are often available on E-bay for a reasonable price. You won't get the experience of dismantling of course, as the experts have already done that for you, but neither will you get wet or frustrated. You may also find a manual for the Note, but manuals for newer cars tell you less than the older ones IMHO - often because fewer tasks are possible for the DiY person.

Edited by Andrew-T on 27/11/2019 at 18:11