disclaimer: uhoh asked me to copy/paste this from my answer on a different question.
The page Martian Meteor Showers repeats a claim that the altitude for, and magnitude of, meteors on Mars are roughly the same as Earth's:
A 1996 paper in the journal Icarus by Adolfsson, Gustafson and Murray has pointed out that, although the atmospheric pressure at the surface is less than one percent the respective value at the Earth, the larger mean scale height of the atmosphere means that at an altitude of ~120km where meteoroids begin to ablate, atmospheric densities are comparable. As a result, meteors of the same mass and atmospheric entry speed at the atmospheres would be of similar magnitude . Taking into account the slower average speed of incoming material at the heliocentric distance of Mars from the Sun, a meteoroid of the same mass entering the martian atmosphere at 30km/sec would produce a meteor +0.5 mag fainter than at Earth.
Adolfsson, Gustafson and Murray, The Martian Atmosphere as a Meteoroid Detector Icarus, Volume 119, Issue 1, January 1996, Pages 144-152, https://doi.org/10.1006/icar.1996.0007