You have to strip the rear area behind your seats and continue to you see your fuel tank. There you will find a oval plate with about 10 8mm bolts. Be Very Careful. Highly Flammable.
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The 2002 Mazda MX-5-Miata runs on regular unleaded.
You can get a 1999 Mazda Miata fuel cap at any auto parts store.
See the Related Links section below.
The 1999 Mazda Miata is a returnless fuel system. It has a Fuel Pressure Regulator in the tank (above the fuel pump), and a snub at the end of the fuel rail.
The 2004 Mazda MX-5-Miata runs on regular unleaded.
The 2005 Mazda MX-5-Miata runs on regular unleaded.
The 2001 Mazda MX-5-Miata runs on regular unleaded.
The 2003 Mazda MX-5-Miata runs on regular unleaded.
in the tank
The 2007 Mazda MX-5-Miata runs on premium unleaded (required).
The 2010 Mazda MX-5-Miata runs on premium unleaded (required).
The 2013 Mazda MX-5-Miata runs on premium unleaded (recommended).