[T3] AIR PRESSURE SENSORS, AT VACUUM UNIT

[Arkady Mirvis <heaterman@nac.net>]

<x-rich>Fellows,

While going thorough my stuff with the intention to do the inventory,
I found 7 air pressure sensors (all made by Bosch) with the following
numbers:


                                                  Bosch number                                     
VW number


1.                                               0 280 100 116                                   
311 906 051 E

2.                                               0 280 100 116                                 
no number stamped

3.                                               0 280 100 049                                   
022 906 051 E

4.                                               0 280 100 049                                   
022 906 051 E

5 .                                              0 280 100 049                                   
022 906 051 E

6.                                               0 280 100 049                                 
no number stamped

7.                                               0 280 100 007


The Type 3 parts book I have ( printed 1971) states VW part # 311 906
051 E as one for cars with engines U 5000 001/ X0 000 001. Someone
wrote a note stating that the number is for '71 and later cars.

Elfrink book (page 52) states VW # 311 906 051C as the number for late
Type 3. On cars of which years is this sensor installed?

My '72 Squareback has the engine # X0 002 521. 

Will any of listed above air pressure sensors work on my engine? One
can see that sensors having numbers 906 051 E can have different
proceeding 3 numbers (311 and 022) and do have different Bosch
numbers. Can be that these sensors are for different cars but
internally and functionally are identical?

Anyway what I really need is to have one spare sensor for my car and,
if what I found isn't good for my '72 car, sell what I have. All
sensors look very fresh. 

What is the correct automatic transmission VACUUM UNIT number for my
car (body # 362 214 6881) ?

My thanks in advance. 

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Ark Mirvis

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</x-rich>