Coolant Expansion Tank for BYD Han EV & Qin PLUS, OE 12390675-00

The listing names the Han EV and Qin PLUS in its title, but the tank suits a wider set of BYD models than the two shown there. Cooling layouts change between variants, so work from the fitment table on this page and find your own build rather than reading the title alone. If your car appears, the second check worth doing is the reference moulded or labelled on the tank you are removing. Send a photograph of the old tank and that number through the quote route.

Yes. That reference appears alongside OE 12390675-00 on this page, so a tank marked HADE-1311010 is the same item under a different catalogue. Moulded references on plastic tanks are often hard to read once the surface has discoloured, so clean the face properly before deciding it does not match. Quote whichever number you can read when you send the enquiry. Where the number you have matches neither reference on this page, say so in the enquiry and we will check it against the OE number.

Delivery time is confirmed with your quote. It also helps to keep the old tank to hand when the new one turns up, so you can compare the two before committing to a fitting slot. If the delivery does not match what you ordered, use the quote route on this page to get it sorted before the car is booked in.

Plastic. It is a moulded item that sits in the engine bay, so it should be carried by the body rather than by any spigot when it is out of the car, and stored somewhere it will not be leant on. Nothing else about the construction is described here, so we will not describe wall thickness or the fittings beyond what the images show. Compare those images and the packed size on this page against the tank you are taking off before sending the quote request.

In the engine bay, which is where this tank sits. On the cars it suits, it is reached from above with the bonnet up and not from underneath. Knowing that helps when you are checking your own car against this listing, because the item you are comparing is the one visible in the bay on the images shown here. Look at those images alongside the fitment table on this page, then send your details through the quote route, since this one cannot be ordered in the ordinary way.

Only the Original/Genuine BYD tank is sourced against this OE number. No Aftermarket equivalent has been taken into the catalogue for it, so the page shows a single version instead of two tiers. That reflects what has been sourced and nothing more. Because this item is handled as a quoted order under the transport restriction, the enquiry you send comes back against that one version. Include OE 12390675-00 and your vehicle details so the reply is tied to the correct reference and not a similar tank from another model.