Folks, be aware that the rollover resistance rating is a calculation, not a test. Note that if there is no rating, it says 'not rated' instead of 'not tested' as it does in the other categories where they actually do the test. The NTSHA has adopted this calculation this year, after the IIHS introduced it 2 years ago.
I am not implying the Muano isn't relatively 'good' in this respect.
Now, the calculation may be a good one, but there are millions of details that can affect how well a simple math model represents a very complex reality.
Morale of this section: DON'T assume, based on this 'rating', that you can drive your Murano like a sports car. Bad things are likely to happen if you do.
I also have my doubts about the fundamental calculation validity(based on IIHS relative rating of 2WD S-10 Blazer vs. 4X4 S-10 Blazer and my extensive experience at driving both), but that is a personal bias on my part.
Speaking of personal bias, I feel compelled to say this:
The IIHS exists for one reason only. TO MAXIMIZE INSURANCE COMPANY PROFITS. Please consider this carefully when deciding how much you trust them, compared to a clumsy - but unbiased- government agency.
For example, all this hubub about SUV rollover danger. Who made this such a big deal? IIHS.
They used single-vehicle accident death statistics to support their position, stating that SUV occupants die at 4X the rate of non SUV occupants in single-vehicle accidents. Sounds bad, but consider: A single vehicle accident is just another way to say DRIVER SCREWED UP. The driver already has demonstrated failure to drive within his/her own limitations, road conditions, and, yes, vehicle performance limits...
Also, the same statistic database shows 75% of those occupants that died were NOT wearing their seatbelts, and 30% were drunk.
So, the stats were heavily biased toward BAD DRIVERS, yet the vehicle design is blamed. Why? Higher insurance premiums for vehicles with low 'rollover resistance' ratings. Never mind that drivers like me (and hopefully you) that 1. Have never had a 'single vehicle accident', 2. always wear seatbelts, and 3. don't drive drunk will in all likelyhood NOT roll their SUV, no matter how low it ranks in this calculation (I have well over 600k mi in the worst-rated vehicle, the S-10 Blazer, with no rollovers).
Whew. I feel better now. Thanks for listening.