I'm in the process of replacing my Fuel Pressure Regulator.

Car is an 89 951, completlely stock, no mods. 109K miles. I checked out the appropriate BOSCH part number for this model 951 and came up with Pt# 280.160.286. Image attached.

When I size up what it's going to take to do the swap things don't look quite right. So now I check out the part number of the actual part number on the old FPR. (I know.. wrong sequence of events)

The part number on the old FPR is different. BOSCH Pt# 280.160.227. Image attached. Checking the Paragon site for the lowdown on this FPR says it's NOT Turbo S !

Everything on this car is OEM and the FPR certainly looks it's age which leads me to think it's original.

I'd usually just shrug and do the replace, but these two FPR's are different as to the installation of the fuel line. One's threaded and the others just a clamp fit.

It looks like the wrong FPR got installed at some point. Hard to believe it was a factory related problem. Any thoughts? Do I need some kind of adaptor to install the correct FPR?

 

The last MY89 944 Turbo and MY90/MY91 944 Trubo got the threaded connection FPR. Before (up to MY89), there was no threaded connection. You just need to choose with or without threaded connection depending on your car and fuel line

 

Asarus:

So if I understand correctly, there is no functional difference between the two types. My car was the 197th car made in the 89 model year, so I assume that Porsche introduced the threaded variant later in the production year?

I had replacing the fuel lines on my list of things to do so I guess in order to use the new threaded FPR I'll have to go to a new fuel line.

Thanks for the info.

 

You're right. Porsche introduced the threaded connection to get a more secure fuel connection (so it needs to get the correct threaded fuel lines as well). You can just change the FPR for a new one without threaded connection, or change the overall (fpr + fuel lines) to get the updated ones with threaded connection.

 

possible factory recall maybe ????

 

Motor serial up to 47 K 02563 (mid-MY89)
--> Porsche 944.110.198.03 = Bosch 0280 160 227 (no threaded connection, clamp)

Motor serial from 47 K 02563 (last MY89 + MY90/MY91)
--> Porsche 944.110.198.05 = Bosch 0280 160 286 (threaded connection)

No factory recall to my knowledge. It only depends on the date of fabrication of your car.

Bonus : Bosch 0280 160 258 or 0280 160 235 or 0280 160 249 (black fpr) are all 3.0 bar FPR without threaded connection (clamp). I didn't find a Bosch reference for threaded connection and 3.0 bar. I use the 968 AFPR from Lindsey Racing that gets the correct threaded connection to fit a MY90/MY91 944 Turbo