For enhanced safety, the front and rear seat shoulder belts of the Lexus ES Series 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 Acura TLX doesn’t offer pretensioners for the rear seat belts.
The ES Series 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 TLX 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 ES Series offers optional Intuitive Parking Assist with Auto Braking that uses rear sensors to monitor and automatically apply the brakes to prevent a rear collision. The TLX doesn’t offer backup collision prevention brakes.
The ES Series’ driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The TLX doesn’t offer a driver alert monitor.
Both the ES Series and the TLX have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, lane departure warning systems, rearview cameras, available blind spot warning systems, around view monitors and rear cross-path warning.
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 Lexus ES Series is safer than the TLX:
|
|
ES Series |
TLX |
| Overall Evaluation |
GOOD |
ACCEPTABLE |
| Restraints |
GOOD |
ACCEPTABLE |
| Head Neck Evaluation |
GOOD |
GOOD |
| Head injury index |
175 |
250 |
| Peak Head Forces |
0 G’s |
0 G’s |
| Chest Evaluation |
GOOD |
GOOD |
| Hip & Thigh Evaluation |
GOOD |
GOOD |
| Femur Force R/L |
.7/1 kN |
1.6/2.1 kN |
| Hip & Thigh Injury Risk R/L |
0%/0% |
0%/0% |
| Lower Leg Evaluation |
GOOD |
MARGINAL |
| Tibia index R/L |
.47/.55 |
1.15/.91 |
| Tibia forces R/L |
2.4/1.5 kN |
4.4/5 kN |
For its top level performance in IIHS driver and passenger-side small overlap frontal, moderate overlap frontal, side impact, roof strength and head restraint tests, its standard vehicle-to-vehicle front crash prevention system, its standard vehicle-to-pedestrian front crash prevention system, and its standard headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the ES Series its highest rating: “Top Pick Plus” for 2021, a rating granted to only 35 vehicles tested by the IIHS. The TLX is not even a standard “Top Pick.”

