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There are 2 generations of CTMs in use:
2009-spring 2012
2012 til 2019 (the youngest I've seen)
The newer ones only work fine on a hydraulic pump with 4 solenoids on top.
Our elder pumps mounted until spring 2012 only have 3 solenoids.
If you buy a new one from stock, only BMW can re-code it for an elder Z4.
If you buy a used one from i.e. eBay, you have to look at the 4 digits timestamp with WWYY (i.e. 4711 for week 47 on 2011).
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