$24 ELM let me know the coolant temp moves a good bit in the first mile so was well worth it. Needle does not move until pulling into work...

Already have a USB OBDII scanner I paid ~$400 for in 2004... not rushing to spend real money on one again unless absolutely necessary. I think every semi-enthusiast should buy the $23 one and order the BavTech or play with the hacky options if something looks really broken.. or they are really curious too

Also until proved otherwise I am still sure the $23 one pulls all codes even it cannot decode all of them. We won't know what some mean like the errors I had a few weeks ago but I'd wager it pulls them

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Six Euro Deliveries since December 1998 (Owned E46, E90, E91, E92 and E93)

28 vehicles in 26 years of driving so far. Guess I like cars