The worst place every
They will install parts they are trained to install even if you bring them in. But if it needs replaced or repaired you'll be stuck paying for it. I've done tires like this. They will charge you for the regular rotation for them since you didn't buy them from there so the expenses extend to regular service of the part like tire rotations. Something to keep in mind if you are just looking to save a buck on the initial purchase price.
Yes but no warranty unless they get the part
Yes they will. I have done that multiple times. The only catch is that NTB has a warranty on the installation of parts they purchase and if that part then fails again, they'll replace it for free. If you bring them a part, you don't get that warranty. And if that part you brought to them fails, you have to pay for them to remove and replace it.
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