Originally Posted by cheese_man
the newer models have more sophisticated ECM software now then back then in 1999
Maybe so, but I'm still going to maintain that you don't have to have a hard reset done by a Mazda dealer when installing a new oxygen sensor.
Here's a quote from Ron...
"it should only take 3 to 6 days for LTFT to correctly reflect new O2 sensors."
I think what ever dealership you spoke to is trying to drum up some business.
Mechanics and dealerships don't know everything or if they do they are taking advantage of their position.
I know a lady who had a 2002 Lexus SUV.
Check engine light came on, but still ran fine or at least she didn't notice anything wrong.
The dealer spent 10 hours trying to track the problem and never did find it.
He said "we can try and put in a new PCM in, but once it's plugged in, it's yours"
He gave her 4 of the 10 hours free, but the new PCM was still 1500.00 bucks ! (dealership price of course)
The mechanic was grasping at straws.
The lady didn't say what the code(s) were, she just said "after all that, the so called factory trained mechanic couldn't figure it out".
Shortly after that she traded it in on a Subaru and got 1500.00 for it.
The Subaru dealer didn't even want the Lexus on the lot, it got sold in an auction.
My point is that the Mazda mechanic doesn't know what he's talking about, or he's being dishonest.
At least at this stage, that's what it looks like.
When ever I hear things where one has to bring in a vehicle to have the PCM reset at the dealer to factory specs, my alarm goes off.
Anyways I won't be commenting on this anymore unless someone asks me a specific question, you may get the last word in, if you want.