js12oo

I've bought brand new boxed part 036906262F for a good price knowing it might not fit. The price was good so I took it. In worst case I'll sell it. So conclusion is to buy exact same part with the exact part number including suffixes? According to this listing, this is Audi number and it fits BBZ engines

No difference. Connector is brown on each, has 4 pin, length of cable is the same. For example this part is compatible with both "D" and "F" suffixes

Yes that's VIN of my car. Connector on both parts is the same shape and 4 pin

So my car won't explode and send me to an orbit? What's the difference between "D" and "F"? Is it improved?

I'd like to replace my post cat lambda sensor. The original number is 036906262D. Can I replace it with 036906262F ?

I plan to replace timing belt with water pump as well as auxiliary belt in my car. Would those parts fit my car? KP25565XS-1 - timing set 6PK1078 - auxiliary belt (not sure about the length of this one) Vin: TMBHD46Y 133 731 213 Thanks