Best Filament for Car & Automotive Parts
A parked car gets hot enough to warp PLA on its own. Here's what survives a dashboard, with live prices.
Last updated: June 2026
Cars are a hostile place for 3D prints. A parked car in summer easily passes 70-80C inside, and a dashboard in direct sun gets hotter still, which is enough to warp a PLA part on its own with no load at all. Add UV through the windows and you need a material built for it.
ASA is the default for car parts: it handles roughly 95C and resists UV, so it survives both the heat and the sun. PC steps in for the hottest spots and the highest strength, and nylon suits tough moving parts. The one rule everyone learns the hard way is to never use PLA in a car.
ASA is the go-to for phone mounts, vents, trim and any interior part that bakes in the sun. It handles around 95C and is UV-stable, so it won't warp or fade on the dash. It prints like ABS, so an enclosure helps.
When a part sees real heat or load, polycarbonate's ~110C resistance and toughness win. It's the pick for brackets near the engine or anything that must not soften or flex when hot. Needs an enclosure and a 300C hotend.
Nylon is strong, wear-resistant and heat-tolerant, good for clips, gears and parts that flex or rub repeatedly. PA-CF adds stiffness for brackets. Keep it dry, as nylon absorbs moisture fast.
For interior parts that stay out of direct sunlight and extreme heat, PETG is a cheaper, easier option that still beats PLA. It handles about 75C, so keep it away from the dashboard and rear deck where temperatures spike.
Never use PLA in a car. A hot parked interior passes PLA's ~60C softening point easily, so a PLA phone mount or vent clip will sag and warp on its own, no load required. Start with ASA for anything that sees sun or heat, and PC for the hottest, most loaded parts.