Who is liable in Germany if a 3D-printed spare part breaks?
In short
Who is liable in Germany if a 3D-printed spare part breaks? If you sell printed parts, you are the manufacturer and liable without fault. If you only print privately for yourself, you are liable for negligence, and personal liability insurance covers that from about 40 euros a year. From 9 December 2026, print files offered in the course of business also count as products.
Personal liability and contents cover for the hobby, product liability for selling. Guide figures from published premium examples in Germany.
Example
Typical range
Personal liability, single
about 40 to 120 euros a year
Personal liability, family
about 60 to 180 euros a year
Household contents, 80 square metres in Dresden or Düsseldorf
about 23 to 54 euros a year
Product liability, small retailer with 100,000 euros turnover
about 77 euros a year
Extended product liability, small business
about 200 to 500 euros a year
Guide figures, October 2026, from published premium examples.
The figures in the worked example are guide values from our quoting practice.
Norman Nammert acts as an insurance broker; the insurer pays the commission,
so the service is free for you.
Worked example
Side business: printed bike mounts sold online
A maker in Berlin sells around 300 printed mounts a year. One breaks while riding, the buyer falls and is injured.
Liability
as manufacturer, without fault
Personal liability insurance
does not pay, commercial activity
Product liability for the shop
from about 77 euros a year
Personal liability and contents for the rest
about 63 to 174 euros a year
For around 140 to 250 euros a year, hobby and sales are insured separately. Without product liability cover the maker pays treatment costs and damages for pain and suffering personally.
Selling makes you the manufacturer
Anyone who sells 3D-printed parts is a manufacturer under the German Product Liability Act (Produkthaftungsgesetz). If a printed bracket you sold breaks and injures someone, you are liable under section 1 without fault. That also applies to a side business through an online shop.
Until 8 December 2026, section 1(2) no. 3 excludes liability if you made the part neither for sale with an economic purpose nor in the course of your job. Occasionally giving printed parts to friends therefore does not make you liable as a manufacturer.
Case
Who is liable
Who pays
Privately printed part injures a guest
you, if negligent
personal liability insurance
Bracket you sold breaks at the customer's home
you as manufacturer, without fault
business liability with product liability
Faulty print file from a shop, from 9 Dec 2026
the provider of the file
its product liability cover
Your printer burns in the flat
no one else
household contents insurance
The printed part itself is broken
no liability cover
you
Printing privately: liable only for fault
If you print a spare part for your own lawnmower, pushchair or bike rack, general civil law applies. Under section 823 of the Civil Code (BGB) you are liable if you injure someone intentionally or negligently, for example by printing a load bearing part from unsuitable material.
Personal liability insurance (Privathaftpflicht) pays for this and also fends off unjustified claims. It does not pay for damage to your own device or the broken part, because liability cover only pays for harm to others.
From 9 December 2026 print files count too
Under the new German product liability law, digital manufacturing files become products. These are digital templates that automatically control machines such as 3D printers. The official explanatory notes expressly mention templates for 3D printers and CAD files.
The provider of a file can be liable if it supplies the file in the course of a business activity, even free of charge. Sharing a file purely privately is not covered. The Bundestag passed the Act on 8 October 2026, and it applies to products from 9 December 2026.
Substantially modifying a product
The new law also covers conversions. Anyone who changes a product after sale so that a new hazard arises and then puts it back on the market is liable as its manufacturer. A dealer who refurbishes used devices with self printed spare parts should know this.
The dealer can escape liability by proving the defect lies in a part it did not change. If the printed spare part is the one that breaks, that exception does not help.
Printed parts on your car
If a self printed part on your car breaks and causes an accident, motor liability insurance (Kfz-Haftpflicht) pays the other party's damage. Your own car is only covered by comprehensive cover (Kasko) within its terms.
Printed parts on brakes, steering or seat belts are risky. Before fitting one, check with a garage whether it affects the vehicle's type approval.
Which insurance you really need
For a private hobby, personal liability and household contents insurance (Hausrat) are enough. You do not need a special module for 3D printing.
As soon as you sell printed parts or print files, you need business liability insurance (Betriebshaftpflicht) with product liability. If your parts are built into other people's products, add extended product liability, which pays, for example, removal and installation costs. Personal liability insurance does not cover commercial risks like these.
Step by step
Decide whether you only print privately or offer parts or files.
Check personal liability and household contents cover for the hobby.
Take out business liability with product liability before your first sale.
Record material, print settings and checks for each batch.
Do not fit or sell safety relevant parts without testing.
Checklist
Personal liability insurance in place if you print privately
Household contents policy covers fire
Product liability before the first part is sold
Extended product liability if your parts go into other products
Print settings and material recorded for each order
Common mistakes
Selling through an online shop and relying on personal liability insurance
Offering print files commercially without thinking about the new law from 9 December 2026
Printing load bearing parts from unsuitable material
Expecting a liability policy to replace your own broken part
Questions and answers
Frequently asked
Am I liable if I give a printed part to a friend?
Not under the Product Liability Act if you made it neither for sale nor in your job.
If you are negligent you are liable under section 823 BGB, and personal liability insurance pays.
Am I liable for a print file I share for free?
For products from 9 December 2026 only if you supply the file in the course of a business activity.
Purely private sharing is not covered.
Does contents insurance pay if my 3D printer catches fire?
Fire is part of the basic cover of household contents insurance.
The printer and other belongings in the flat are covered within your policy limits.
Who is liable if the filament was faulty?
The filament maker is also liable under the Product Liability Act.
Towards your customer you remain liable as the maker of the end product.
Do I need special 3D printing insurance as a hobbyist?
No.
Personal liability and contents insurance cover the hobby.
