BMW Cooling System O Ring Kit E46 M52 M54 320i 323i 325i 328i 330i xi *Hose *Set

Description

These o-rings seal the BMW press & clip hose connections.  In addition, we also include o-rings for the heat exchanger (3x 17111711987) and temperature sensor in the lower radiator hose (1743299 or 13621743299).  As always, all our products are made in the USA with unparalleled quality and fit.
With trial and testing on vehicles we ourselves service, our kits optimize performance, quality, and value through the use of multiple compounds (NBR, HNBR, EPDM).  All the green o-rings in our kits are peroxide cured EPDM, which we use in the most vulnerable locations for its excellent high temperature performance (150C/300F) and chemical resistance to glycol based coolants.  We have transitioned all of our kits to more of these EPDM o-rings for the most vulnerable and highly stressed connections.  Also included is a packet of water based lube, which can be used on all coolant connections.
***Due to feedback from customers, we no longer include the coolant pipe o-rings (
11531435808) and have replaced them a few extras of other commonly needed ones because in the rare instance that you're removing the coolant pipes, you'll more than likely need to replace them with new ones that come with new o-rings already installed on their ends.
If, however, you need these o-rings, please send us a note with your order or message us, and we'll send them along at no additional charge.  As always, we use the optimal compound for this application.
When encountering o-rings of identical size, green ones may be used only for coolant connections.
Do not use petroleum based lubricants on any coolant connections!
This kit services vehicles equipped with automatic transmissions.For manual transmission and complete vehicle kits for e46 as well as other BMWs, please see links below.
Standard shipping is USPS 1st Class Package, 2-5 days in most cases.  If you need your item sooner choose expedited shipping, USPS Priority Mail 2-3 days or USPS Priority Express 1-2 days guaranteed.
If you require coverage for a different model not listed, please contact us and we'll assemble a kit that will cover your needs.
These are metric o-rings and are of the same dimensions as the ones that came on your car.  The cooling system on the 3 series (and all other BMWs) requires a good deal of maintenance, especially the expansion tank (ET) and thermostat.  In most cases, the o-rings at press & clip hosing ends will leak after they've been disconnected due to compression set.  During winter, leaks tend to develop during the cool down cycle as the already compressed rubber o-rings contract with lower ambient temperatures.  Where applicable, all kits include the temperature sensor o-ring for the lower radiator hose.
BMW does not offer o-rings for their press & clip hose connections and most dealerships do not stock the o-ring for the coolant temperature sensor in the lower radiator hose separately.   But don't waste money buying a new sensor or unnecessarily replacing hose assemblies, all of which can last well beyond 10 years/150,000 miles.  We've assembled this kit for working on customers' vehicles after growing tired of throwing away countless serviceable parts when all that was needed were some fresh o-rings.
The photo in this listing is generic.  Our kits contain between 19 and 34 o-rings depending on application.
We carry a large inventory.  For orders of more than 10 kits, please contact us!
For other complete vehicle kits, please click the proceeding links:
1 Series e81 e82 e86 e87
3 Series e46
3 Series e90, e91, e92, e93
5 Series e39, e60
X3 X5 e83, e53, e70
Z4 e85 e86