I'm told by a Leica tech that some M9 owners have cracked sensors and don't realize it from improperly mounted sensors.
The reason is that the cracks appear as lines in the image often don't show up in smaller size prints.
Check towards the corners of your sensors first, with a magnifier.
Or have a tech check for you.
As these sensors are no longer used in the newer M, getting a cracked M9 sensor replaced now UNDER WARRANTY while replacements are still available takes on new urgency!
Stephen
The reason is that the cracks appear as lines in the image often don't show up in smaller size prints.
Check towards the corners of your sensors first, with a magnifier.
Or have a tech check for you.
As these sensors are no longer used in the newer M, getting a cracked M9 sensor replaced now UNDER WARRANTY while replacements are still available takes on new urgency!
Stephen
ajramirez
Established
Is the sensor in the ME different? I thought it was the same sensor as the M9.
EdwardKaraa
Well-known
I bought a used M9 and discovered the crack in the sensor by taking a standard dust spot test shot at infinity and small aperture. The crack was very obvious and unmistakable. The camera was returned and I bought a brand new one with no cracks so far 
Vickko
Mentor
sigh, warranty expired in March this year.
seanbonner
Established
I was told this by Leica directly. The Leica M uses a new sensor, but the ME uses the same sensor as the M9
EdwardKaraa
Well-known
Does the problem still occur in the most recent batches? I don't believe so.
raid
Dad Photographer
Leica should accept the free return and repair of all cameras with cracked sensors, regardless of being under warranty or not. This is unacceptable, and it should be like a car recall.
D.J.
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Nigel Meaby
Well-known
My sensor was replaced for free out of warranty. They should be doing this for everyone as it's a known fault.
raid
Dad Photographer
This is good to know. Else, I would forever dump any digital Leica.
jaapv
RFF Sponsoring Member.
I think your tech confused a few things. The sensor crack occurs sporadically and the cause is officially unknown. The most likely suspect is the layering of the IR filter. It is impossible to miss on your image.
The unnoticed defect is the red line, caused by a dead pixel.
The M9 sensor is still in the Truesense catalog, is the same as for the ME and should be available as a spare for at least ten years after production on the ME stops.
The unnoticed defect is the red line, caused by a dead pixel.
The M9 sensor is still in the Truesense catalog, is the same as for the ME and should be available as a spare for at least ten years after production on the ME stops.