How long will a magnet last if it is opposed by a magnetic force equal to its own?
Go to the dealer, have them inspect it.
Check it to see if anything is bent or broke. You may want to get the front end aligned.
Just go to the professional place to check
A permanent magnet has its magnetic dipoles lined up to a certain extent. When it is placed with another magnet with an opposing field one of two things happen. Either it immediately loses some of its magnetism or it never will. It doesn't wear out or get used up. There is hysterisis in the magnetic field needed to magnetise and demagnetise a magnet. For modern magnets it needs a field far stronger than the residual magnetism ( i.e magnetism at the time the magnet is provided ) to either magnetise the material or demagnetise it.
