Drain plug washers

Fellas, am just about to do a complete oil change...well not RIGHT now... but have realised I don't have replacement drain plug washers for the gearbox (300tdi) and transfer box and I'm struggling to figure here's heir part numbers and where to get them. any help? Am I right in thinking the one for the transfer box is the same size as the one for the engine sump?

do I even need to replace them or can I get away with reusing the old ones?

cheers

Unless they're leaking oil why would you change them...assuming they're copper all you should ever need to do is heat them up and let them cool naturally to soften them

cheers, heat it is

Make sure they get red hot or it dont work. Dont dunk them in water otherwise they go hard again.

gear box washer is ftc4112 transfer box frc4808

thanks James, v helpful

Nip into stealers and ask for the washer. Mine gives them out free coz they cant be bothered with the transaction as its a few pennies!