Between Saturday 2nd August and Sunday 10th August 2025, 6 club member vehicles or Bay windows parked nearby, were reported to have sliding door issues. Each one was the same root cause, each fixed in under 10 minutes for free. You can do it too!

Sliding door won’t close and nothing has changed?
Sliding door won’t open and nothing has changed?
Sliding door won’t run smoothly and nothing has changed?

The root cause is the same – something HAS changed! Time has passed.

The sliding door has a top roller that runs in a channel. Grab your grease pot (avoid copper based as it is potentially carcinogenic), and put a decent sized blob of grease on that roller itself above the cream plastic cover. It runs in that top channel and only touches the left and right / inside and outside edges of the channel. Add a smear of grease to both sides – don’t bother greasing the top, the roller doesn’t touch it.

At the bottom of the door opening is another roller and another channel. You’ll need to repeat the process with the grease here – don’t just spray product into the hole, you need to grease the C shaped channel inside that hole and again you are doing the sides not the top. A blob on the roller as well will really help.

Now put the sliding door almost closed as in the above shot. The middle runner slides on top of a single 2mm thick piece of steel. Grease on the top of that but don’t worry about getting it perfectly on, just grease it up. The rearmost inch or so doesn’t get used, no need to grease to the end. When you are down there, that red U shaped steel goes up into the latch mechanism. From underneath, get a load of WD40 into there.

Now with the door almost fully open but not quite, locate the middle latch as shown above. That little finger holds the door open. Spray that liberally with WD40 from this side having just doused it from underneath.

That’s it for the hard work, now slide the door mostly closed to mostly open. Repeat 20 or 30 times to get that grease really spread through the dry sections and your sliding door should be a whole lot better.

You do do this as part of your regular maintenance though right?