FYI, there is ALSO an authorized Emissions Testing Center in Los Cedros, about 5 minutes north of Ixtlahuacan, or 15-20 minutes north of Chapala ... much closer than Guadalajara. Cost is $250 pesos. We got a sticker there just today. It is called AutoServicio Martinez -Techmart. Tel (376) 762-1676. Good mechanics, large covered and well equipped shop, also with computer analysis.