So what exactly do you do? Connect a tube from exhaust pipe and a hose of some sort to the driver's window and put it in?
Also from wiki
Suicide by carbon monoxide poisoning may be attempted by running the engine in an enclosed garage, or by piping the exhaust gas into the driver's compartment with a hose, but catalytic converters required for air quality regulations eliminate over 99% of carbon monoxide produced.[1
From lost all hope
Whilst it is possible to achieve death using this method, it does generally require older cars. The method is susceptible to a number of things that can go wrong, and for this reason it is no longer cited as an effective method of committing suicide, and certainly not in places like the US, UK and Australia where car emissions are more tightly controlled.
It is technically false to claim that modern cars in countries like the United States, the United Kingdom, or Australia cannot reach lethal concentrations of carbon monoxide (CO). Three-way catalytic converters, although highly efficient, only function properly after reaching operating temperatures above 300°C, which does not occur during the first few minutes after ignition. In that time frame, even a brand-new, fully compliant vehicle can emit exhaust gases containing more than 2% CO by volume (equivalent to 20,000 ppm). Channeling these gases into a sealed cabin of 2.5–3 cubic meters can lead to concentrations exceeding 10,000 ppm in under an hour—levels that can cause loss of consciousness within minutes and death within 10–15 minutes. Forensic studies confirm CO-related deaths in post-2010 vehicles even in countries with strict emissions standards. The statement that "modern cars no longer allow this" is an ideological oversimplification, not a technical fact. Wikipedia is often cited to support generic claims, but it is a secondary source, written by anonymous contributors—not by forensic experts or automotive engineers. Its content is subject to editorial bias, ideological revisions, and public health-driven censorship. Anyone who merely quotes Wikipedia without understanding the thermodynamic behavior of catalytic systems and the physiology of gas accumulation in enclosed spaces is not providing evidence, but merely an opinion disguised as authority. And in any case, no medical examiner or automotive expert would ever sign a written statement declaring that sitting in a closed garage with a modern catalytic car running poses "no risk whatsoever"—because that would be a technical falsehood and a legally indefensible claim.
Furthermore, it should be noted that the voluntary removal of catalytic converters is far more widespread than commonly assumed. In many countries, including the United States, the United Kingdom, and Australia, it is not uncommon for unofficial workshops or complicit mechanics to remove or bypass the catalytic converter to boost vehicle performance or resolve clogging issues, often without fully informing the client. There is also a large community of enthusiasts and private individuals who carry out such modifications themselves, removing the catalyst and remapping the ECU to disable the monitoring systems. In these cases, carbon monoxide emissions can increase drastically, with tailpipe concentrations exceeding normal values by 10 or even 20 times. This makes it even more evident how flawed the claim is that "modern cars no longer allow it," because many of these cars are no longer configured as they left the factory.
