The X5’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The 4Runner doesn’t offer pre-crash pretensioners.
The X5 has a standard PostCrash iBrake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The 4Runner 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.
Over 200 people are killed each year when backed over by motor vehicles. The X5 offers an optional Active Park Distance Control that uses rear sensors to monitor for objects to the rear and automatically applies the brakes to prevent a collision. The 4Runner doesn’t offer backup collision prevention brakes.
Both the X5 and 4Runner have rear cross-traffic warning, but the X5 has Cross Traffic Warning with Braking (automatically applies the brakes) to better prevent a collision when backing near traffic. The 4Runner’s Rear Cross-Traffic Alert doesn’t automatically brake.
For better protection of the passenger compartment, the X5 uses safety cell construction with a three-dimensional high-strength frame that surrounds the passenger compartment. It provides extra impact protection and a sturdy mounting location for door hardware and side impact beams. The 4Runner uses a body-on-frame design, which has no frame members above the floor of the vehicle.
Both the X5 and the 4Runner have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, 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, driver alert monitors and available all wheel drive.
A significantly tougher test than their original offset frontal crash test, the Insurance Institute for Highway Safety does 40 MPH small overlap frontal offset crash tests. In this test, where only 25% of the total width of the vehicle is struck, results indicate that the BMW X5 is safer than the 4Runner:
|
|
X5 |
4Runner |
| Overall Evaluation |
GOOD |
MARGINAL |
| Restraints |
GOOD |
GOOD |
| Head Neck Evaluation |
GOOD |
GOOD |
| Head injury index |
114 |
142 |
| Peak Head Forces |
0 G’s |
0 G’s |
| Steering Column Movement Rearward |
1 cm |
12 cm |
| Chest Evaluation |
GOOD |
GOOD |
| Hip & Thigh Evaluation |
GOOD |
GOOD |
| Femur Force R/L |
1.4/1.3 kN |
3.9/2.4 kN |
| Hip & Thigh Injury Risk R/L |
0%/0% |
1%/0% |
| Lower Leg Evaluation |
GOOD |
ACCEPTABLE |
| Tibia index R/L |
.41/.52 |
.95/.85 |
| Tibia forces R/L |
2.3/.8 kN |
5/2.9 kN |
The BMW X5 achieved a “Top Safety Pick” rating from the Insurance Institute for Highway Safety (IIHS) for the 2024 model year. This recognition was based on its impressive performance in the small overlap frontal crash test, updated side impact crash test, headlight evaluations, and pedestrian crash prevention testing. The 4Runner is not a “Top Safety Pick” for 2024.

