Will a blower motor resistor with a slightly different part

Hi ive got a 1990 Audi coupe 2.3e B3 and my heaters blower motor is only working on number 4. Ive seen a lot of people with similar Audis get the same problem and 9 times out of 10 its the blower motor resistor. I bought a new resistor for my car and removed the old one at the weekend but the one i had bought was totally different. The new one only had a 4 pin connector but the original had a 5 pin connector and the connector from the blowwer motor could plug into it too. It was obviously not the right part. My original part number for the resistor is 894959263 but i cant get one anywhere. I csn however get one with the part number 893959263 which looks identical to my original part but the 3rd digit is one number higher on mine. Does anyone know if this part will fit my car? It looks identical and the connector is for 5 pins like mine. Thanks.