One owner on r/Polestar has been measuring trunk lips. In a thread on r/Polestar, the poster works through three cargo mats before settling on one with enough structure to stop sliding and a raised edge tall enough to contain a spilled drink. The same post flags a sub-floor panel that gets lifted often enough for mat thickness to matter.

This is a single owner's account. It is worth reading because the complaint is specific, the criteria are clear, and the search ended in the aftermarket rather than with a first-party accessory.

What the thread actually says

The r/Polestar post lists the failure modes in plain language. Mat one slid around. Mat two had almost no raised lip, so a single leaking drink would defeat the purpose. Mat three was kept because it had enough rigidity to stay put and enough edge height to hold a spill.

None of that is a defect claim against the car. The poster does not describe a safety issue or a warranty event. They describe the experience of buying a cargo mat for a Polestar 3 and not finding the right one quickly.

Where it touches automaker strategy

Accessory programs are part of how premium brands hold margin after the sale. A cargo mat sold through the dealer at a known fit is a small line item that compounds across a model run. When an owner of a car positioned alongside the Polestar 4 ends up on Reddit comparing third-party mats, the first-party accessory funnel has lost that customer for that item.

AutonomyEV has not found a public Polestar statement on cargo accessory fitment for the Polestar 3 load bay, and the owner thread is one data point. We are not generalizing from it to a brand-wide product defect.

AutonomyEV's opinion

The interesting part of the post is not the mats. It is the gap between a car that photographs well and the daily friction of living with the load bay. Polestar's design language is strong on surfaces and weak, in this one owner's telling, on the boring geometry of what sits on the floor behind the rear seats.

If that experience repeats across other owners, and we do not have evidence yet that it does, the fix is small. Buy the mats the r/Polestar thread tested, measure against the Polestar 3 load floor, and offer the one that fits through the official accessory catalogue. That is a one-engineer, one-buyer task. It does not need a platform refresh, a software update, or a press event. It needs someone in Gothenburg to read the thread.