Occupant restraint and airbag engineer

Expert class library · Product engineering · Either side

An automotive or mechanical engineer who analyzes seatbelts and airbags, including whether a belt unlatched or was worn, whether an airbag should have deployed and whether a safer restraint design would have prevented injury. Courts admit deployment threshold and alternative restraint design opinions grounded in crash data, inspection and literature, but exclude defect opinions that declare a component defective without testing or data.

What this expert is retained to answer

• What does the airbag control module or event data recorder show about crash severity and deployment commands?
• What is the airbag's must deploy threshold, and does the expert's crash speed estimate exceed it?
• What testing or data support the claim that a belt component, such as a buckle spring, was defective?
• Has the proposed alternative restraint, such as a center airbag or reverse geometry belt, been used or tested by any manufacturer?
• Does the expert's theory fit the physical evidence from this crash, such as belt marks and the buckle's condition?

Methods

• Belt witness mark examination
• Airbag control module data review
• Sensor algorithm analysis
• Sled testing
• Deployment threshold and crash speed analysis
• Alternative restraint design analysis

How the testimony is attacked

• Defect declared without testing. Defendants attack opinions that call a component defective without data. In Easterling v. Ford Motor Co. the court excluded a seat belt engineer's opinions that cracked plastic buckle return springs were defective and that steel springs were safer because he offered no testing or data.
• Testing divorced from the crash. Challengers argue that laboratory tests do not match the physical evidence. Easterling noted that buckle tests showing unlatching with a partly depressed button could not show the subject button was in that position during the crash.
• Non-deployment as proof of defect. Proponents argue that an airbag's failure to deploy in a crash above its threshold is evidence of a defect even without identifying the failed part. In Bensenberg v. FCA US the Seventh Circuit reversed exclusion of an engineer's opinion that the vehicle struck a post above the must deploy threshold, which supported a nonspecific defect claim under Illinois law.
• Alternative design reliability. Defendants argue that proposed alternative restraints were never shown to work. In Kim v. American Honda Motor the Fifth Circuit affirmed admission of an automotive engineer's opinion that a center airbag or reverse geometry belt would have prevented a far side impact injury, based on inspection, literature, patents and company documents.
• Qualifications for restraint design. Opponents note when an engineer has never designed a restraint system. Easterling found qualification a close question for an engineer with long crash experience but no buckle design work, and decided the motion on reliability instead.

What the public record shows

A deliberately narrow CourtListener search, (airbag OR "air bag" OR seatbelt OR "seat belt") AND engineer AND expert AND (Daubert OR "Rule 702"), returned 57 opinions filed since 2015, as of October 3, 2026; broader searches return more. Three that show how courts handle this class of testimony:

Each case links to the free opinion text on CourtListener.

Under amended Rule 702

Since December 1, 2023, Rule 702 says expressly that the party offering an expert must show the court it is more likely than not that the testimony meets each requirement: that it rests on sufficient facts or data, uses reliable methods, and reflects a reliable application of those methods to the case. Questions about the basis of an opinion are no longer automatically matters of weight for the jury. For how the circuits have applied the amendment, see the Rule 702 tracker, which follows each court of appeals; for what that means for preparing or attacking this class of expert, see the guide on amended Rule 702.

Related classes

• Automotive crashworthiness engineer
• Accident reconstructionist
• Biomechanical engineer

Guides

• Amended Rule 702 After Nearly Three Years: What Courts Exclude

Simulating this class on a matter

Supreme Mind simulates a class of expert, never a named individual, on your fact pattern and returns the likely opinion, the ranked cross-examination weaknesses, the Rule 702 attack surface and what it means for settlement. Read how it works, or book a demo.

Last reviewed October 3, 2026. How this page is built: rulings are found by searching court opinions on CourtListener, and each one is read in the opinion before it is summarised here; outcomes are labelled by what the court did with the expert's testimony. No individual expert is named. This page summarises public decisions for orientation and is not legal advice; read the opinion before relying on any ruling.