intereresting posting, asemaster. Thanks.
This is important in Mexico mostly for those in places like Mexico City where smog is a real problem.
My car does need to pass tail pipe testing every six months. But, you specified that passing verification does not mean it is running perfectly.
I am out in the country, an hour from any city. The only time we have detectable contamination is when there is a fire in the woods, which is not common. Or, when Popo, the volcano near Mexico City produces large amounts of ash.
I guess that was dumb. This is a quarry town, so we have dust contamination all the time.
I go to Tecamachalco to get my car verified. Until recently, the cousin I often reference went into Tepeaca (a town which existed when Cortes came here in 1520-ish) and they would tell him his Yukon failed but for a few dollars they could get is past. So he paid and got his sticker and document.
Once they told him it failed, but refused the bribe until he got if fixed. So, as soon as that happened, I assumed the other times it actually passed, they did not want a bribe to pass a failed vehicle, but a bribe to pass a good system. Grr. Grr.
In Tecamachalco, I shiver with nervous anticipation (what do I do and where do I go if it fails?) then they hand me the passed documents and put the sticker in the windshield.
I do plan on getting a graphing scanner in March when I return to the US for documents. Then, if it fails, I will know what the problem is, and will not need to trust someone who has no clue at all.
Sometimes the corrupt will hit a foreigner harder and sometimes they give them a pass if they think bad news might get taken out of Mexico. Some years ago, my daughter was out riding with her cousins in Mexico City, in the car of a military officer, former childhood friend. A cop stopped him for a failed stop light and tried to shake him down. Ernesto told him, “I am an officer and a gentleman, and cannot pay a bribe.”
So, the cop took them all to the station. As soon as the cops knew my daughter was American (you cannot tell by looking) they had a policewoman take her into a separate room until the matter was settled. They did not want a tourist to see what goes on. But, Ernesto never did pay a bribe. He took his fine like a man. “I goofed up; I must pay.”