Align Retention Points and Coverage Areas
Once the liner is in the cabin, guide it into the footwell without forcing the edges. Check that the retention points line up, the pedals have unobstructed movement, and the liner does not bunch up under the seat rails or trim. Those are the most important basics whether you are installing a driver-side liner or a full set sourced through Acura accessories.
If something looks off, stop and re-check the part selection before trimming or modifying anything.