I went to the local VW dealer and picked up a pair of fuel pump relays.  The parts they gave me are labeled #53 and the part number is 141 951 253B.  When I got home I opened the black box above the coil and I see a pair of #24 part number 171 937 503.  Am I looking at the correct relays?  Is the #53 a newer replacement for them?  They appear to both be 40 amp relays, but I don't want to fry something by swapping them.

  Thanks,
  Clint