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Old 03-20-2019, 02:56 PM
StephenVA StephenVA is offline
Join Date: Jun 2013
Location: Virigina, USA
Posts: 2,155
StephenVA is on a distinguished road
Way to easy

Expansion Tank BMW
Includes vent screw and leveling switch
Brand: Genuine BMW - Corporate Logo ES#: 38482 Mfg#: 17137501959

Expansion Tank
Includes vent screw and leveling switch
Brand: Mahle-Behr - Corporate Logo ES#: 3023890 Mfg#: 17137501959

Stay away no - RUN from the cheap aftermarket parts. They will fail. See all the postings on Expansion tank failures from those who went before you.....

Now, regarding the leaks that you are seeing else where. The entire cooling system at 140K is on borrowed time. They have run their normal life cycle and needs a complete replacement. Either all at once or part at a time. Your car, your choice. As each part will fail one at a time in normal driving cycles, start, stop, city, Hwy.

Gather up your parts and do the job once and while your in there consider all the passageways and lines.... Just a thought and suggestion.

TIP: When you install the hoses, wipe a THIN coating of American Grease Stick SG-4 Sil-Glyde Lube Compound (4 oz Tube) on the inside hose seals. This will stop them from rolling and binding on install. Plus it keeps them flexible into the future. Works on all rubber seals like the air intake parts around the MAF sensor tube, etc.
Attached Images

2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green

Last edited by StephenVA; 03-20-2019 at 03:25 PM. Reason: Warning
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