For enhanced safety, the front and second-row seat shoulder belts of the Toyota Grand Highlander have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The Jeep Grand Cherokee L doesn’t offer pretensioners for its second-row seat belts.
The Grand Highlander has a standard Secondary Collision Brake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The Grand Cherokee L doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.
Both the Grand Highlander and Grand Cherokee L have rear cross-traffic warning, but the Grand Highlander Limited/Platinum has Parking Support Brake (automatically applies the brakes) to better prevent a collision when backing near traffic. The Grand Cherokee L’s Rear Cross Path Detection doesn’t automatically brake.
Both the Grand Highlander and the Grand Cherokee L have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, height adjustable front shoulder belts, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, blind spot warning systems, rearview cameras, rear cross-path warning, available all wheel drive and around view monitors.
Side impacts caused 23% of all road fatalities in 2018, down from 29% in 2003, when the Insurance Institute for Highway Safety introduced its side barrier test. In order to continue improving vehicle safety, the IIHS has started using a more severe side impact test: 37 MPH (up from 31 MPH), with a 4180-pound barrier (up from 3300 pounds). The results of this newly developed test demonstrates that the Toyota Grand Highlander is safer than the Grand Cherokee L:
|   
  | 
     Grand Highlander  | 
     Grand Cherokee L  | 
  
|   Overall Evaluation  | 
     GOOD  | 
     GOOD  | 
  
|   Structure  | 
     GOOD  | 
     GOOD  | 
  
|   
  | 
     Driver Injury Measures  | 
  |
|   Head/Neck  | 
     GOOD  | 
     GOOD  | 
  
|   Head Injury Criterion  | 
     38  | 
     163  | 
  
|   Neck Tension  | 
     134 lbs.  | 
     312 lbs.  | 
  
|   Neck Compression  | 
     45 lbs.  | 
     67 lbs.  | 
  
|   Torso  | 
     GOOD  | 
     ACCEPTABLE  | 
  
|   Shoulder Deflection  | 
     .35 in  | 
     1.06 in  | 
  
|   Shoulder Force  | 
     156 lbs.  | 
     178 lbs.  | 
  
|   Torso Max Deflection  | 
     1.1 in  | 
     1.3 in  | 
  
|   Torso Deflection Rate  | 
     4 MPH  | 
     7 MPH  | 
  
|   Head Protection  | 
     GOOD  | 
     GOOD  | 
  
|   
  | 
     Passenger Injury Measures  | 
  |
|   Head/Neck  | 
     GOOD  | 
     GOOD  | 
  
|   Neck Compression  | 
     89 lbs.  | 
     134 lbs.  | 
  
|   Torso  | 
     GOOD  | 
     ACCEPTABLE  | 
  
|   Shoulder Deflection  | 
     .67 in  | 
     1.38 in  | 
  
|   Shoulder Force  | 
     245 lbs.  | 
     268 lbs.  | 
  
|   Torso Max Deflection  | 
     1.1 in  | 
     1.69 in  | 
  
|   Torso Deflection Rate  | 
     6 MPH  | 
     11 MPH  | 
  
|   Pelvis  | 
     GOOD  | 
     ACCEPTABLE  | 
  
|   Pelvis Force  | 
     446 lbs.  | 
     915 lbs.  | 
  
|   Head Protection  | 
     GOOD  | 
     GOOD  | 
  

