AFAIK, all of the Maintenance Minder items are driven by algorithms that
indicate when the fluids need changed.
It's based on things the cars are already monitoring: miles,
temperature, cold starts, RPMs, etc. All these things are thrown into
the mix and taken into account by the Maintenance Minder.
I don't believe there are any sensors actually looking at the fluids, no.
Likewise on MDX. I got the code and have them replaced. Good insurance.
Since new I always used dealer service whenever code pops up. Also
timing belt and water pump. This '08 MDX is still running like new.
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