I'll throw this in. I just can't imagine an ILS contained in an NDB being accidentally coded with a front course more than 5 degrees in error, so
It's not the ILS which is wrongfully coded but the magnetic variation as it's is part of the data base. Logically if the variation is wrong everything else is wrong. on the 330 you can simply check it by switching to TRUE HEADING not on 320 as far as I remember. I clearly remember to have read the explanation in the old FCOMs but it was 20 years ago. However there's a FCB 15 on 320 saying
AUTOMATIC LANDING WITH OUT-OF-DATE ADIRS MAG VAR TABLE Some Airbus SA and LR aircraft continue to fly a number of years with ADIRS part numbers fitted with out-of-date magnetic variation tables. If the ADIRS magnetic variation differs by more than 2 ° or 3 ° (depending of aircraft type) compared to the airport current magnetic variation, the lateral performance of the automatic landing and rollout is significantly affected, which prevents from using the automatic landing system on these airports. Airbus publishes in the FCOM for each year, the list of airports where automatic landing is no more authorized with these ADIRS part numbers.
Last but not least what can you check at 350 ft you haven't done or seen before? ILS course check is part of approach briefing and done before TOD.
