Front Lower Control Arm Ball Joint (Left) for BYD Tang DM-i, OE 11779778-00

Yes. This is the left front lower control arm ball joint. The side is named from the driver's seat looking forwards, so with the car facing you it is the joint on your right. Joints are ordered per side, and the right-hand one has its own listing and OE number. If you are replacing both sides at once, put two items in the order. Where you are unsure which side the noise or play came from, ask the garage to tell you before you buy rather than working it out from the invoice afterwards.

The listing runs across a broad spread of BYD models, so check the fitment table on this page against your own model and year instead of trusting the title. Look for your exact variant in the table, since one model name can cover several builds. The surest check of all is the OE number 11779778-00 taken from the joint or the arm being replaced. If your car is missing from the table and you still think this is the part, send the details through the quote route on this page first.

It is. The OE number is 11779778-00, and it is also known as ST-2904300, so a quote written against either one lands on this listing. Read the marking off the old part where you can, because that beats working back from a description. If the number you or the garage has matches neither reference, use the quote route on this page and send it over with your model and year, and we will check it against the fitment table before you commit.

Yes, this joint is safety critical, and it sits in the underbody at the front of the car, in the lower position on the control arm. That puts the work on a ramp with the weight off the wheel. We give no fitting method and no figures on this page, and nothing here should be taken as a stand-in for the workshop procedure for your model. Hand the garage the OE number 11779778-00 and confirm the left-hand side when the car is booked in.

The delivery time is 8 to 25 days, from order to door. The shipping cost for your country is shown on this page and confirmed at checkout before you pay. Before you order, check the number on your old part against OE 11779778-00. If anything about the timing matters for a booked repair, ask through the quote route on this page. Keep the packaging until you have compared the new part with the one you removed.

This part is made from metal. Because it is metal, the new joint can be set beside the old one and compared directly on the bench before anything is fitted. If the two do not agree, leave the car as it is and raise it with us through the quote route on this page.

This listing holds a single version, the Original/Genuine joint from BYD, and the price shown on this page covers that item. There is no Aftermarket equivalent sourced against the reference, so no second tier appears. What sits behind that is availability for the number rather than a decision about which tier to show. If you would like an alternative looked into, use the quote route on this page and include the OE number 11779778-00 along with your model and year so we know what to search for.