I have checked at the last 3 VW shows I attended, and it does appear that in
'86 VW changed the gas cap to use the ignition key on all models.  This is
not reflected in any key application chart I have seen.  I have forwarded
the information to key manufacturers and publishers of key references for
corrections.  I appreciate everyone on the list who corrected me.
Apparently early Vanagons (pre '86) used a short key (my '84 does.)  Syncros
and '86+ models used the ignition key.  Non-dealer aftermarket caps I have
found all use the short key.  I've not found an aftermarket syncro cap to
check.  Replacement late model caps from the dealer are sold uncoded
(without wafers or springs) and must be coded to the correct key .  I've
also not found a glove box using the ignition key.  Last week I spent half a
day in wrecking yards researching this, so I feel pretty sure about it all,
Thanks for all the information, everybody.  Just when I think I have all the
answers, somebody changes the question!
Steve Sandlin
www.steveslockshop.com
'84 Wolfsburg Westy
'79 Transporter
'00 New Beetle