Took the towing (i.e. withidl) plunge...

[Emory39]

Originally Posted by jcp240z

To add some more information for posterity, the E70 233A increased towing capacity option included a different rear differential. Discovered this on a UK site specializing in differential rebuild kits. Back checked on RealOEM.
It also included an additional small radiator in the wheel well. This appears to be added if the car had the hot climate or the increased towing capacity option.

The European vehicles had a hot climate option which gave a larger radiator for the 4.4i. This is the same radiator standard for the 4.6iS. I can't find a hot climate radiator for the 3.0, but if I was towing I'd search more to see if it was an option.
I do see on some posted Russian sites E53s with the 233a option, but have no,t been able to determine yet what is different about it.

Can you put the link for the external radiator I can't find. Thanks!

[jcp240z]

17117586544
Radiator
From:04/01/2008To:-Weight:1.463 kgPrice:$314.97
Supersedes:

17007796838 (01/02/2008 — 08/03/2008), nonexchangeable retrospectively
17117586545 (05/27/2008 — 10/07/2008), Exchangeable retrospectively
17007796839 (12/01/2006 — 04/07/2009)
Part 17117586544 was found on the following vehicles:
X5 E70   (02/2006 — 06/2013)
X5 E70 LCI   (04/2009 — 06/2013)
X6 E71   (01/2007 — 06/2014)
X6 E72 Hybrid   (10/2008 — 10/2011)

[Emory39]

So I just went to real OEM and notice that the extra oil cooler that you provided the part number for is some what the same as the one my X5 E53 4.4 n62 engine. Mine is just mounted in front of the coolant radiator, rather than the side bumper in front of the wheel.

Here is the link that shows it
https://www.realoem.com/bmw/enUS/sho...diagId=17_0289


The 3.0 with an m54 engine does not comes with this..

[jcp240z]

The one I posted is not an oil cooler. It's an extra coolant cooler giving the radiator extra capacity. This is for the E70 models. I can't find anything similar for E53s.

[Emory39]

Got it. I was looking at the 4.8 n62n engine. The radiator that you pointed out is for the 3.5d models. Makes sense it's a diesel.
.