The Leica M-E was introduced in September 2012, the same month and year that the Leica M9 was discontinued (after three years of production) and the Leica M typ 240 was introduced. The first reports of sensor corrosion problems I can find, reported on M9 bodies, date to late Spring 2014.
I'm sure Leica didn't know about the corrosion problem in 2012. There had been other problems with the sensor earlier in the model's history ... cracks and bad communications lines ... which were judged to be "single point defective" issues by all and sundry. They never amounted to more than a 1% of production warranty issue.
Since there are even now cameras that have not displayed the sensor corrosion problem, I surmise that it is a problem that surfaces after some time and under certain conditions of stress. For example, my M9 was purchased new in January 2012 and took three years to exhibit the problem. I never wet cleaned my camera's sensor either, and it was always kept in my usual manner ... mostly in a 68-75 degree, dry condominium in Silicon Valley. Far as I can tell, the camera was never stressed or subjected to unusually humid environment at all. It functioned perfectly the entire time I owned it, omitting the sensor corrosion issue itself which surfaced very rapidly about November of 2014.
Making the assumption that Leica knew that there was a corrosion problem with these sensors back when the M9 and M-E were being designed (approximately 2007 for the start of M9 development, I imagine) is to accuse them and the sensor supplier of extended fraud and conspiracy to defraud. I doubt you'll find any evidence to base that claim on, and I'm certain that it took Leica and the folks at Kodak who designed and produced the sensor for them by surprise as much as it took users by surprise. And it cost them FAR FAR more than the minor inconvenience of having the camera out of action while a new sensor was installed too.
The whole sensor corrosion issue is an unfortunate incident that has been as well handled by Leica as it is possible to imagine. You suggest a better way to handle what probably cost them a loss of several million dollars cash, a year or so worth of development effort and time, and so much user confidence and satisfaction.
G
What you are suggesting is that Leica and/or the sensor mfg did not perform any type of product testing before putting it out into the market.
Products normally undergo an intensive battery of tests to see points of failure, and how long to get there. And how to improve the failure rate so that the likelihood of it happening under warranty is minimized..
For my sensor to fail so quickly under the category of corrosion, as well as many others, this suggests that either there was little to no product testing pre market release, or Leica did not think it would be an issue as most Leica owners are not Leica users. The cameras are trinkets.
The gamble that Leica took obviously failed, and the only reason that this initial 'goodwill' offering was introduced was to stave off the possibility of a class action law suit.
To think that Leica has our backs is naive. The offer by them to 'upgrade' the affected users to an M240 was very clever as it keeps them in the fold.
Leica is a business, just like any other. They try to maximize their profits by cost cutting where they can without pushing it too far so it bites them.
In this case it did.
As for only finding out about it in 2014..
A quick google search and I am sure there are numerous other accounts.
Especially since mine failed in 2012, 2 years before Leica was "aware" of this corrosion issue.
https://www.dpreview.com/articles/8752612172/leica-m9-users-report-sensor-corrosion-issue
First comment from 2014:
"Three sensor changes in the fours years i have owned a M9....
Leica store in Paris blamed it on me because i use my camera in a tropical environment.....and i was warned that I will have to pay for the next sensor change !!!!"
So he had his first corroded sensor in 2010. The camera was released in 2009. But Leica was "unaware" of this until 2014? Right.
Yes he used it in a tropical climate, but so are digital cameras from other mfgs w/o this issue. And if the tropical climate is an issue Leica would have known it from their pre production testing. Such that it was.
From their testing results, they would have thus known about this failure and would have either :
1. made a change to the sensor or
2. informed owners that their cameras should not be used in humid climates (a non starter from a sales stand point)
3. Kept quiet about it figuring they could deal with it on a case by case basis.
Guess which one history shows they chose?
I am enjoying my M240 when I use it. Perhaps Leica has finally kicked these issues when they moved to the generic CMOS sensor.