Because of some confusion when and what sensors speedometer mounted over the years and their compatibility I will try to explain.
Sensor on the left is mounted to sept.’87 on E30, E23, E24, E28. It has a white version too.
To the right is a sensor mounted after sept.’87 of E30, E34 (models to 525TDS), last E24
As can be seen in the next picture, irreplaceable:
The next picture is E30 to sept.’87: №62161369906
Here E30 after sept.’87: №62168355008
The same sensor on E34:
On the next picture are sensors that have the same connectors:
To the right of the photo are the sensors of the above photos that are installed after sept.’87 on E30, E34 (models 518i, 520i, 524td 525td and 525TDS), the sensor on the left with BMW № 62168357020, which is painted in blue for all E36 and E31, and this in white for visco LSD of E30, which is exactly the same, but with white plastic.
Here it is of E36:
Because of the difference in length, however, any of E34 sensors, may be replaced by a blue from E36, but not vice versa. This is because of structural differences in the rear cover and impulse wheel respectively:
Remained two sensors that are mounted on E34 (525i, 530i, 535i and M5) and E32 to july’90 №62161379874:
after july’90 №62161390063: