I got the one from Amazon and installed it (takes a allen head socket insted of the 17MM factory one) seems to work well.  IMHO good deal for less than $100.00.

Anybody else come up with anything else? No way this one would work? its for the Teves system like in pontiac 6000s and some buicks and other GM products.

http://www.ebay.com/itm/ACDelco-25528382-Pressure-Accumulator-/271067617697?pt=Motors_Car_Truck_Parts_Accessories&fits=Make%3APontiac&hash=item3f1ce399a1&vxp=mtr

Quote from: Prospeeder on May 07, 2013, 08:30:53 PM
Anybody else come up with anything else? No way this one would work, its for the Teves system like in pontiac 6000s and some buicks and other GM products.

http://www.ebay.com/itm/ACDelco-25528382-Pressure-Accumulator-/271067617697?pt=Motors_Car_Truck_Parts_Accessories&fits=Make%3APontiac&hash=item3f1ce399a1&vxp=mtr

Very similar operation pressure to PMIII setup so they work fine. I've been busy, but meaning to look around for information on what pressures the BMW accumulators used. If they're close, they're probably the cheapest option from the place someone in this thread posted about($90). 

Autohaus AZ 1-800240-4620 P/N 34331162054 under 90 bucks

This part doesn't work, at least not anymore.  I just ordered one, first the accumulator is twice the size of ours.  And the threads are much much bigger...  So I do not believe it is an option anymore.  I sent mine back.

Go to GMpartsdirect.com. in stock for   $147. plug in year and model.