3D Printed Car Parts: What You Can Print, What You Never Should, and What It Costs

3D printed car parts are a cheap, fast way to replace broken plastic pieces such as clips, caps, knobs, covers and cup holders. You buy a digital STL file for €5.99 to €14.99 and print it at home or at a print shop. Never print safety-critical parts like brakes, steering or seat belt components.

Every modern car is full of small plastic parts. They hold trim in place, cover screws, close storage boxes and turn the fan up. After 10 or 20 years of heat and sun, many of them crack. Dealers often sell them only as part of a bigger assembly, or have stopped making them.

That is where a 3D printer helps. One file and a few grams of filament can replace a missing clip or a snapped knob. This guide explains which parts work well, which parts you must leave to the professionals, which material to use, and how to find a file that fits your car.

Which car parts can you 3D print?

The best candidates are small, non-structural plastic parts. If a part breaks and the worst result is a rattle, a gap or an annoyed driver, it is usually a good print. Our library has more than 13,700 models for 45+ car brands, and most of them fall into the groups below.

A single car can have a long list of printable parts. For the BMW 3 Series E46 alone, our library holds 155 files: 21 clips, 18 covers, 12 trays, 12 cup holder parts, 10 panels and more. Older, popular cars usually have the most files, because owners have been fixing them for years.

Real examples from the library

• A 76 mm BMW oil filter wrench for the E46 318i, which its designer notes also fits the E30, E36, E34 and Z3 cap.
• A front ashtray cover for the E46, with a second hollow version that prints faster.
• A fan knob for the 1997+ Jeep Wrangler TJ, a part many owners struggle to find.
• Side marker light clips for the 2001–2004 Toyota Tacoma (Toyota part 53138-04010). The designer recommends nylon or PETG and warns against PLA.

Parts you should never 3D print

Some parts protect your life. A home-printed plastic part cannot match the tested materials and production control behind them. We never offer models for these parts, and we recommend you buy them from the car maker or a trusted supplier.

• Brakes: calipers, pads, brake lines, pedal parts and anything in the brake system.
• Steering: steering wheel hubs, column parts, tie rods and linkages.
• Restraints: seat belt buckles, guides and anchors, airbag covers and airbag parts.
• Structure: chassis, suspension, crash structures, towing and recovery points.
• Seat mounting: rails, brackets and anything that holds a seat to the floor.

A simple rule: if a part failing could cause a crash or make a crash worse, do not print it. Cosmetic covers near these areas are fine, such as a bumper end cap that is clearly marked as non-structural.

Best materials for 3D printed car parts

Material choice matters more than any other setting. A parked car in summer can reach 60–80 °C on the dashboard, which is hot enough to soften PLA. Pick the material by where the part lives.

• PETG: easy to print and tougher than PLA. Good for clips, caps, cup holder parts and anything out of direct sun. Softens around 75–80 °C.
• ASA: the best all-round choice for car interiors and exteriors. It handles heat to around 95–100 °C and resists UV light. Print it with an enclosure if you can.
• ABS: similar heat resistance to ASA and easy to sand or paint, but it yellows in sunlight and warps more during printing.
• Nylon (PA): tough and slightly flexible. Ideal for clips, latches and rod holders that must bend without snapping. Dry it before printing.
• TPU: rubber-like. Use it for plugs, seals, pads and anti-rattle parts.
• PLA: fine for a quick test fit, but not for parts that stay in the car.

For a deeper comparison with temperatures and print tips, read our best filament for car parts guide.

What 3D printed car parts cost compared with buying new

The cost of a printed part has three pieces: the file, the filament and the printing. Here is how the options compare.

The value is clearest for full car packs. Bought one by one, the 155 BMW E46 files are worth €1,409.45. The pack costs €49.99, a 96% saving. Dealer prices vary a lot by brand and part, so compare for your own car. The bigger win is often availability: a printed file still works when the original part is no longer made. Our guide to replacing discontinued car parts covers that case in detail.

How to find the right file for your car

A good fit starts before you press print. Follow these steps.

1. Identify the car exactly. Note brand, model, generation and body style. An E46 coupe and an E46 touring do not share every trim part.
2. Search by part and car. Browse your brand, for example our BMW parts collection, or look at all car, area and problem packs.
3. Read the product page. Each file credits its independent designer and lists their fitment notes, such as which year or body style they tested.
4. Measure the old part. Use a calliper on the key sizes: hole diameter, shaft shape, thread size.
5. Print a test copy. A fast draft at low infill shows fit problems before you spend time on the final part.

Want to understand the file format itself? Our guide to car parts STL files explains what you get and how to open it.

Common mistakes

1. Using PLA for a final part. It often warps in the first hot week. Use PETG, ASA, ABS or nylon.
2. Printing a safety part. No file, material or setting makes a printed brake or seat belt part safe.
3. Ignoring layer direction. Layers split more easily than they bend. Orient clips so the layers run along the arm.
4. Trusting fitment without checking. Designers test on their own car. Read the notes and measure yours.
5. Too few walls. Small parts get strength from 3–4 perimeters, not from 100% infill.

FAQ

Are 3D printed car parts strong enough?

For clips, caps, knobs, covers and trays, yes, if you print them in PETG, ASA, ABS or nylon with enough walls. They are not suitable for structural or safety parts.

Do you ship a physical part?

No. PartsRemade sells digital STL files. You print them at home or at any local or online print shop.

Is it legal to print replacement car parts?

Printing a part for your own car is generally fine. Our brand Pro packs include a commercial licence on commercially licensed designs, so you may print and sell parts, but not the files.

What printer do I need?

Any common FDM printer works for most files. An enclosed printer makes ASA and ABS easier to print without warping.

What if my part is not in the library?

Send us a photo through our contact page and request a model. We look at every request.

Written by the PartsRemade Engineering Team.