Whether a car door stops a bullet depends on whether it was built and tested as armor, to which standard, and against which rounds. For ordinary, unarmored car doors, we found no government or police test report that measures how they perform against gunfire (checked 29 September 2026), so this article does not guess. It covers armored doors: the standards a claim can point to, what each one tests, and what to ask for. It reports what the records show; it never ranks or endorses a product.
"Bulletproof" and "bullet-resistant"
For body armor, NIJ's own Body Armor User Guide says no body armor is bulletproof. Vehicle and barrier standards use the word "bullet-resistant" or "bullet-resisting" instead, and tie it to a defined test. UL 752, for example, says "bullet-resisting" means protection against complete penetration, passage of fragments of the projectile, or spalling (fragmentation) of the protective material, to the degree that a person directly behind the barrier would not be injured. Every rating names the rounds it was tested against, and says nothing about rounds outside that list.
The standards a door claim can point to
VPAM BRV, for whole vehicles
VPAM, an association of European test laboratories, publishes a test guideline for specially protected vehicles, meaning vehicles that offer protection from attacks with firearms. Under it, the materials of the essential protective areas are tested first, and only pretested materials may be used. The vehicle is tested from all angles of attack, except the floor unless testing of the floor is requested. After installation, the testing facility inspects the protective components, and a test fails if the witness plate behind the target is perforated. The guideline classifies vehicles into resistance classes named VR, such as VR8, VR9 and VR10.
NIJ Standard 0108.01, for materials
NIJ Standard 0108.01, Ballistic Resistant Protective Materials (1985), sets performance requirements and test methods for armor materials intended to protect against gunfire. NIJ lists its uses as protecting the occupants of vehicles, portable ballistic shields and fixed structures. It excludes body armor and helmets, which have their own NIJ standards. It rates a material, not a finished vehicle.
UL 752, for barriers
UL 752, Standard for Bullet-Resisting Equipment, covers materials, devices and fixtures that form bullet-resisting barriers against robbery, holdup or armed attack, and can be used for building components such as windows and walls. It does not address personal protective equipment. Its twelfth edition, dated 17 October 2023, uses performance designations such as UL-HG-A for handguns, UL-RF-A for rifles and UL-SG-A for shotguns. Its published scope does not mention vehicles (read 1 October 2026).
A material rating and a finished door are different records
Our position, stated as ours: a door is more than a panel. It has a window, seams, a hinge side and a latch side. A material rated under NIJ 0108.01 or UL 752 was tested as a sample of that material. A vehicle rated under VPAM BRV was tested as a vehicle, with its installed components inspected. Ask which of the two a claim refers to, because the answer changes what the claim covers.
Levels also do not convert between systems. Each standard uses its own threats and its own pass criteria: VPAM judges penetration against a witness plate, UL 752's definition includes spalling, and NIJ levels are defined by their own test rounds. A level from one system has not been tested to another system's rounds unless it was tested to both.
What to check
- Which standard and edition is the claim made under: VPAM BRV, NIJ 0108.01, UL 752, or another?
- Does the rating cover the whole vehicle, or a material or panel used in the door?
- Which level or class, and which rounds does that level name?
- Which laboratory tested it, and can you see the test report for that exact vehicle or material?
- Are the door windows covered by the same rating as the door panel?
A bullet-resistant rating answers the question its test asked. Ask for the standard, the class and the test report, and read what was tested: the material, or the finished vehicle.
Sources
- NIJ, Body Armor User Guide (read 2026-09-29)
- VPAM, VPAM-BRV test guideline (overview page) (read 2026-09-29)
- VPAM, Test Guideline Specially Protected Vehicles: Requirements, Classification and Test Procedures (English, 2021) (read 2026-09-29)
- VPAM, APR test guideline, edition 3 (read 2026-09-25)
- NIJ, Ballistic Resistant Protective Materials, NIJ Standard 0108.01 (read 2026-09-26)
- UL Standards & Engagement, UL 752, Standard for Bullet-Resisting Equipment (read 2026-09-29)
- NIJ, Specification for NIJ Ballistic Protection Levels and Associated Test Threats, NIJ Standard 0123.00 (read 2026-09-25)
- UL Solutions, What Does It Take to Stop a Speeding Bullet? (read 2026-10-01)