Second Compression Piston Ring for BYD Song & Sealion, OE 12798687-00

Check it rather than assume it. The reference spans a fair spread of BYD models, so start with the fitment table on this page and match your model to your build year. After that, compare OE 12798687-00 with the reference on the paperwork or packaging from the last strip down. Because this is the second ring rather than the first, ordering by description alone is easy to get wrong. If your car does not appear in the table, send a photograph of the old part and its label through the quote route and we will confirm against the OE number.

It does if it reads 472QA-1004202, which we offer as the alternative to OE 12798687-00 for this item. Either number will bring you to the same listing. Compare both against whatever you were given before assuming a problem. The ring itself will carry no reference you can read, so your paperwork is the thing to check. If the number you have matches neither of ours, send it to us with your model and build year on the quote route and we will tell you what it corresponds to.

Delivery takes 8 to 25 days from your order to your door. Set the workshop booking against it. If you are ordering ring sets for a rebuild, get everything on the same order so one item does not hold the engine open. Ask us if the date is tight. The shipping cost for your country is shown on this page and confirmed at checkout before you pay.

This ring is made of metal, with no further detail given beyond that. It is supplied new, and rings take permanent damage from being over sprung or stored loose, so keep it in its packaging until the piston is in front of you and you are ready to fit it. No gap, width or coating figure is published for it, so you should not read any of that into the material description alone. Handle it only once you are set up to fit it.

This ring sits in the engine bay, and inside the engine it sits with the piston and bearing group. It is reachable only with the engine stripped, so nobody buys this as a standalone repair. We give no guidance on fitting order or ring orientation and supply no instructions with the part. Do the fitment check against the table on this page first. Beyond that, the assembly detail belongs to the engine builder working on your car, who will also confirm what else is worth renewing at the same time.

Against OE 12798687-00 we offer only the Original/Genuine part made by BYD, with the Aftermarket tier empty for this reference. It is purely a question of what we can source. When a part does have two routes behind it, both tiers are priced on this page and the choice sits with you. Here the page shows one version at the price shown on it. If an alternative reference for the same engine would help you, put your model and build year to us on the quote route and we will look into it.