*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 are uncertain about which kit you need, please send us the last 7 digits of your VIN to verify compatibility.  

These o-rings seal the BMW press & clip hose connections.   Excellent quality & made in the USA.  Where applicable, kits will also included the following o-rings: BMW Part # 13621743299, 17111711987, 11537802638, 11537545278, & 11517514942.

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.  

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!

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:




 X3 X5: e83, e53, e70

Z4 e85 e86

If you require coverage for a different model, 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.