Mud Flaps & Arch Trim

Trimming a liner solves the noise and creates a slower problem. The liner exists to keep stones, water and road salt away from the wiring, brake lines and the inner face of the wing, and every centimetre you remove is an opening into that space. If the liner has pulled loose because the fasteners have gone, refitting it with a fresh clip set costs very little. If the moulding itself has torn or deformed, replace it. Liners are among the cheapest body parts here and they protect much more expensive ones.

On a car that sees winter salt or unsurfaced roads, yes. A mudflap catches the spray thrown rearwards by the tyre, which is what sandblasts the sill, the lower door and the panel behind the arch. The damage shows up as stone chipping along the lower edge and, a few years later, as corrosion starting from those chips. Flaps are inexpensive, they bolt into existing points on most vehicles, and this category lists them for each corner separately since front and rear shapes differ.

Position and coverage. The arch liner lines the wheel housing itself, curving around the tyre from the bumper to the sill. A splash shield sits below or behind that, covering the subframe, the drive unit or the underbody so spray does not reach mountings and connectors from beneath. They meet at the edges and often share fasteners, which is why one coming loose usually takes the other with it. Both are listed here individually, with the subframe shields carrying their own left and right brackets.

Get it on stands and look before it becomes an expensive noise. The usual cause is a front subframe splash shield with broken fasteners, hanging at one corner and beating against the road at speed. Left alone it eventually tears free, taking its mounting bracket or a piece of the liner with it. Check every fastener along the edge, replace the missing ones, and if the shield has torn around the mounting holes, order the shield and the brackets together rather than adding washers.

Most of them are textured black mouldings designed to be fitted exactly as they arrive, which covers liners, splash shields, mudflaps and the majority of arch trim panels. Body colour arch flares are the exception, and where a listing describes an unpainted flare it is supplied primed for painting to the colour code on your vehicle plate. Check the finish field before ordering. Textured trims should never be painted with ordinary body paint, since it sits on the grain and flakes at the first jet wash.

This is one of the cheapest categories on the site. Clips, brackets and mudflaps sit right at the bottom, liners and splash shields are modest, and the most expensive items here are large body colour arch flare panels. The live minimum and maximum are shown in the band at the top of this page. Since a missing liner leads to corrosion behind the wing and damaged wiring, replacing one promptly is among the better value repairs you can make on a car.

Yes, and it is a good first job. Turn the steering to full lock to open up the arch, remove the wheel if you want an easier time, then take out the push rivets, plastic screws and one or two bolts holding the liner. The new part goes in the same way. The only real skill is in the fasteners: buy a fresh clip set, note which type goes where before removal, and start every clip by hand rather than driving it home with a screwdriver. Budget an hour per corner.

Because tyre noise becomes obvious once there is no engine masking it. Felt faced or fibre moulded liners absorb the roar generated inside the wheel housing rather than reflecting it into the cabin, so manufacturers specify them widely on quiet vehicles and on higher trim levels. They are not interchangeable with plain plastic liners: the mounting pattern is usually shared but the thickness and the acoustic behaviour are not. If your car left the factory with felt, order felt, and check the listing description rather than assuming from the picture.

No. Arch trims are handed and position specific, and the ones mounted on the rear door differ from those mounted on the bodyside even where they meet at the shut line. The curvature follows the panel, the clip pattern follows the panel, and the grain often differs slightly between mouldings made in different tools. Match the OE number and the position described in the listing. If your number returns nothing, send it through the quote form so the factory catalogue is checked rather than approximated.

Keep the arch clear and the liner attached. Most arch corrosion starts on the inside, where a loose liner traps a wet pad of grit and salt against the paint and holds it there for months. Pull the liners once a year, wash the cavity out, check the drain slots along the lower edge are open, and replace missing fasteners. Where a liner is torn, replace it rather than cable tying it back. That routine costs almost nothing and prevents the most common repair on older cars.

A little, and more than they used to. Underbody shields and liner shaping keep airflow attached along the floor and out past the sills, which is why manufacturers cover so much of the underside on efficiency focused vehicles. Driving with a shield missing or hanging costs a small amount of range at motorway speed and a good deal more in spray reaching components. It is not the main reason to replace one, but it is another entry on the same side of the argument.

Yes. Arch liners and splash shields are moulded to one body shape and are often replaced only after damage, so the demand is irregular and pricing follows demand. Send the number and say which corner. Buy the clips with the liner. Arch liner clips are destroyed on removal almost without exception and a liner held by half its fixings tears free at motorway speed, which then takes the wiring or a brake hose with it. If the old liner was torn by a kerb strike, check the subframe splash shield behind it before you close the job.