When shopping for a used car, safety should rank high on your priority list. The challenge? Figuring out how to compare vehicle safety ratings across different systems can feel confusing at first glance. Two organizations, NHTSA and IIHS, use different testing methods and scoring scales, which makes side-by-side comparisons tricky without some background knowledge.

At Certified AutoBrokers, we help customers throughout Western New York and beyond find reliable vehicles that meet their safety standards. Whether you're browsing our inventory online or visiting our Grand Island location, understanding what those star ratings and safety picks actually mean gives you more confidence in your purchase decision.

This guide breaks down both rating systems, explains what the scores represent, and shows you exactly how to use these tools when evaluating your next vehicle. By the end, you'll know how to read crash test results, interpret safety awards, and make informed choices based on real data rather than marketing claims.

What vehicle safety ratings can and can't tell you

Safety ratings give you objective crash test data that shows how a vehicle protects its occupants during specific impact scenarios. Both NHTSA and IIHS conduct controlled laboratory tests that measure factors like airbag deployment, structural integrity, and dummy injury readings. These scores let you compare vehicle safety ratings based on repeatable, standardized collision scenarios rather than relying on anecdotal evidence or marketing materials.

What the ratings actually measure

NHTSA runs frontal, side, and rollover tests that simulate common crash types you might encounter on the road. Their star system rates how well a vehicle protects adult passengers and children during these impacts. IIHS takes a different approach by testing small overlap frontal crashes, roof strength, and head restraints that address specific injury patterns they've identified through real-world accident research. Both organizations use crash test dummies equipped with sensors to measure forces on the head, chest, legs, and other body regions during impact.

What gets left out of the scores

The ratings focus exclusively on crashworthiness and crash avoidance technology, which means several important safety factors fall outside their scope. Here's what the tests don't evaluate:

Visibility and blind spots: How well you can actually see around the vehicle
Ease of use: Whether safety features are intuitive or confusing
Reliability: If the safety systems will still work after 50,000 miles
Child seat installation: How easily you can secure different car seat models
Emergency handling: How the vehicle responds during panic maneuvers
Weather performance: Traction and stability in rain, snow, or ice

Driver behavior also plays a bigger role than any rating can capture. A five-star vehicle doesn't protect you if you're distracted, speeding, or ignoring road conditions.

Safety ratings measure how a vehicle performs under controlled test conditions, not how it handles every real-world scenario you'll face.

The scores also reflect testing from a specific model year, which matters when you shop for used cars. A 2018 model might have earned top ratings when new, but those scores don't account for wear on safety components like seat belts, sensors, or structural elements. You still need to inspect any used vehicle thoroughly and check its maintenance history, regardless of what its original safety ratings showed.

Step 1. Nail down the exact vehicle you're comparing

Before you can compare vehicle safety ratings effectively, you need to identify the exact make, model, year, and trim level of each vehicle on your list. This precision matters because safety scores often vary between different configurations of the same car. A base model sedan might have four stars while the top trim with additional safety features earns five stars, even though they share the same nameplate.

What details you need to collect

Write down these specific details for each vehicle you're considering:

Year: 2019 Honda Accord (not just "Accord")
Trim level: LX, Sport, EX, EX-L, or Touring
Body style: Sedan vs coupe vs hatchback
Drive configuration: FWD, RWD, AWD, or 4WD
Engine type: 4-cylinder vs V6 vs hybrid

Trim levels determine which safety features come standard versus optional. An LX trim might lack the blind spot monitoring and forward collision warning that come standard on the Touring trim, which directly affects test scores and available ratings.

Small differences in trim level can mean the difference between a Top Safety Pick award and no recognition at all.

Use this comparison template

Create a simple comparison sheet to track each vehicle's specifics:

Vehicle 1: 2020 Toyota Camry SE (4-cylinder, FWD)
- NHTSA Overall: ___
- IIHS Award: ___
- VIN (for used cars): ___

Vehicle 2: 2020 Honda Accord Sport (4-cylinder, FWD)
- NHTSA Overall: ___
- IIHS Award: ___
- VIN (for used cars): ___

For used vehicles at Certified AutoBrokers, you can request the VIN to verify the exact trim and factory options. This step prevents you from accidentally comparing ratings between vehicles with different safety equipment packages.

Step 2. Compare NHTSA stars and recalls

NHTSA's website (nhtsa.gov) provides star ratings from 1 to 5 for frontal crash, side crash, and rollover resistance tests. You'll find these scores by searching for each vehicle's year, make, and model in their database. The overall rating combines these three categories into a single score, which gives you a quick snapshot of crashworthiness. Each star represents a 10% range in calculated risk, so a five-star vehicle has a 10% or less chance of injury in the tested scenarios.

How to read NHTSA's star system

Pull up the ratings for each vehicle on your comparison list and record the individual category scores, not just the overall rating. A car might earn four stars overall but have five stars for side impact protection and only three stars for rollover resistance. These breakdowns matter because they show you specific strengths and weaknesses that might align with your driving conditions. If you frequently drive on highways with high-speed traffic, strong side-impact protection becomes more relevant than rollover scores.

Vehicles with identical overall ratings can have dramatically different performance in individual crash categories.

Check recall history alongside ratings

NHTSA also maintains a recall database that shows safety defects reported after a vehicle went on sale. Search for recalls using the VIN when you shop for used cars, since this tells you if previous owners completed required fixes. A vehicle with excellent crash test scores but multiple unresolved recalls presents a different risk profile than one with slightly lower ratings and a clean recall history. Print or save the recall report for any vehicle you're seriously considering, then verify with the seller that all safety recalls have been addressed before you finalize your purchase.

Step 3. Compare IIHS crash tests and awards

IIHS uses a four-tier grading system (Good, Acceptable, Marginal, Poor) for individual crash tests instead of stars. You'll need to visit iihs.org and search for each vehicle by year and model to find their detailed test results. Each vehicle gets separate grades for small overlap front tests (driver and passenger side), moderate overlap front, side, roof strength, and head restraints. The organization also evaluates headlight effectiveness and front crash prevention systems, which NHTSA doesn't test in the same way.

How to interpret IIHS crash test grades

Record the grades for each crash test category when you compare vehicle safety ratings across different models. A vehicle needs Good ratings in all six crashworthiness tests to qualify for any safety award. Pay special attention to the small overlap front test results, since this scenario (hitting a tree or utility pole with 25% of the front bumper) causes severe injuries in real-world crashes. Vehicles that score Acceptable or lower in this test show structural weaknesses that might not appear in other ratings.

IIHS discovered that many vehicles with strong moderate overlap scores performed poorly in small overlap crashes, which led to significant safety improvements across the industry.

Understanding Top Safety Pick awards

IIHS grants Top Safety Pick or Top Safety Pick+ awards to vehicles that meet specific criteria beyond crash test performance. A standard Top Safety Pick requires Good ratings in all crashworthiness tests plus Acceptable or Good headlights and Advanced or Superior front crash prevention. The plus version demands Good headlights on all trim levels and Superior-rated crash prevention systems. Check which trim levels earned the award, since manufacturers often equip only their highest trims with the required safety technology while lower trims miss the cutoff.

Step 4. Make an apples-to-apples decision

You've gathered NHTSA stars, IIHS grades, and recall histories for each vehicle on your list. Now you need to compare vehicle safety ratings in a way that accounts for your actual driving conditions and priorities. This step prevents you from choosing a vehicle based on an impressive overall score that doesn't match how you'll actually use the car.

Match configurations exactly before comparing

Line up vehicles with equivalent trim levels and safety equipment when you review the scores side by side. A 2021 Mazda3 Select (base trim) with basic collision warning doesn't compete fairly against a 2021 Subaru Impreza Premium with EyeSight driver assist. If one vehicle requires a higher trim level to achieve its top safety scores, factor that price difference into your budget comparison. Check each vehicle's window sticker or specification sheet to confirm which safety features come standard versus optional, since this affects both the ratings and your total cost.

Comparing a base model against a fully loaded trim creates a misleading safety evaluation that doesn't reflect what you'll actually buy.

Create a weighted decision matrix

Build a simple scoring system that reflects what matters most for your situation. Assign point values based on your priorities:

Vehicle A: 2020 Honda Civic EX
- NHTSA frontal crash (5 stars): 10 points
- IIHS small overlap (Good): 10 points
- Headlight rating (Acceptable): 5 points
- Recall status (2 open): -5 points
Total: 20 points

Vehicle B: 2020 Toyota Corolla LE
- NHTSA frontal crash (4 stars): 8 points
- IIHS small overlap (Good): 10 points
- Headlight rating (Good): 10 points
- Recall status (all resolved): 0 points
Total: 28 points

Weight the categories based on your daily driving patterns and passenger needs, not just which vehicle has the highest overall rating.

Final takeaways

Learning to compare vehicle safety ratings gives you objective data that cuts through marketing noise and helps you make smarter buying decisions. You now know how to interpret NHTSA's star system, read IIHS crash test grades, and understand what those Top Safety Pick awards actually require. More importantly, you know how to match the right configuration, check recall histories, and weight the scores based on your specific driving needs rather than chasing the highest overall rating.

Safety ratings don't tell the whole story about a vehicle's long-term reliability or real-world performance, but they provide a solid foundation for your research. When you're ready to see how these ratings apply to actual vehicles in our inventory, browse our used cars in Grand Island, NY to find models that meet your safety standards and budget. Our team can help you verify exact trim levels and confirm which safety features come standard on any vehicle you're considering.