New headlight unit throwing up dipped light fault

[Bothwellbuyer]

I've just bought a 2012 Q7 S-line. The garage had the steering column changed I think due to a fault, and it took almost 8 weeks to get the part from Audi, which was fitted by a non-dealer specialist in Glasgow. When I picked the car up last week, a new offside geadlamp unit had been fitted. The lens was pretty bad so I assumed they changed it to get it through the MOT. I drove the car home, but within a mile, a fault light showed up on the dash saying the right side dipped headlamp was faulty. I took the car back today and they cleared the fault but it returned after a mile or so driving.
I used to own a 2014 Volvo XC90 and they had fault codes if the bulbs were non-compatible.
Any ideas on what I should look for here? Compare bulbs seems an obvious one, or does the new bulb/headlamp unit need coded into the car? Going back to the car dealer seems a waste of time.
The nearside headlamp unit is the original.

Other question - how much is it to buy/obtain a second key for the car?
Many thanks.

[Crasher]

What is the VIN?

[Bothwellbuyer]

Wauzzz4lxcd027741

[Crasher]

It has Pr8BP Bi functional gas discharge lights and there could be all sorts of reasons for the warning so firstly you need to get a code read done and if possibly, get the part number of the new unit they fitted.

[Bothwellbuyer]

It has Pr8BP Bi functional gas discharge lights and there could be all sorts of reasons for the warning so firstly you need to get a code read done and if possibly, get the part number of the new unit they fitted.

The garage gave me the box that the new unit came in - one label has AD8324923VA : SO-2981214 from Arnold Clark Autos.
The label says Audi Q7 10>15
Headlight Bi-Xenon (OEM/OES) R/H

Knowing nothing about bulbs, is this a different bulb type to the one you have mentioned ?

[Bothwellbuyer]

An Audi garage found the offside light has been wired via the nearside headlamp. With cables altered, they suspect a central ecu fault.