2018 Chevrolet Impala

large car / 4-door sedan

Crashworthiness

Rating overview
Evaluation criteria	Rating
Small overlap front: driver-side
Moderate overlap front: original test
Side: original test
Roof strength
Head restraints & seats

Crash avoidance & mitigation

Evaluation criteria	Rating
Headlights
Front crash prevention: vehicle-to-vehicle
Optional system	Superior
Optional system	Basic

Seat belts & child restraints

Evaluation criteria	Rating
LATCH ease of use

Other available safety features

Optional blind spot detection
Optional lane departure warning

Key

G
Good
A
Acceptable
M
Marginal
P
Poor

Superior
Advanced
Basic

Some ratings use a scale of Poor to Good. Others range from Basic to Superior.

Small overlap front: driver-side

Rating applies to 2015-20 models

Tested vehicle: 2017 Chevrolet Impala 1LT 4-door

The Chevrolet Impala was redesigned for the 2014 model year. Beginning with the 2015 model year, the front-end structure was modified and the door sill was reinforced to improve occupant protection in small overlap frontal crashes.

Evaluation criteria	Rating

Structure and safety cage
Driver injury measures
Head/neck
Chest
Hip/thigh
Lower leg/foot
Driver restraints and dummy kinematics The dummy’s head contacted the frontal airbag but then slid off the left side, leaving the head vulnerable to contact with forward structure. The side curtain airbag deployed and had sufficient forward coverage to protect the head from contact with side structure and outside objects. The side torso airbag also deployed.

Action shot taken during the small overlap frontal crash test.

The dummy's position in relation to the door frame, steering wheel, and instrument panel after the crash test indicates that the driver's survival space was maintained reasonably well.

The dummy's head contacted the frontal airbag but slid completely off the left side, allowing the head to move into the gap in coverage between the frontal and side curtain airbags.

The driver's space was maintained reasonably well, and risk of injuries to the dummy's legs and feet was low.

Technical measurements for this test

Evaluation criteria	Measurement
Test ID	CEN1709
Lower occupant compartment
Lower hinge pillar max (cm)	11
Footrest (cm)	8
Left toepan (cm)	1
Brake pedal (cm)	3
Parking brake (cm)
Rocker panel lateral average (cm)	3
Upper occupant compartment
Steering column	1
Upper hinge pillar max (cm)	6
Upper dash (cm)	8
Lower instrument panel (cm)	8

Evaluation criteria	Measurement
Test ID	CEN1709
Head
HIC-15	89
Peak gs at hard contact	no contact
Neck
Tension (kN)	1.3
Extension bending moment (Nm)	17
Maximum Nij	0.21
Chest maximum compression (mm)	17
Femur (kN)
Left	0.5
Right	0.0
Knee displacement (mm)
Left	0
Right	1
Knee-thigh-hip injury risk (%)
Left	0
Right	0
Maximum tibia index
Left	0.68
Right	0.32
Tibia axial force (kN)
Left	2.0
Right	0.1
Foot acceleration (g)
Left	54
Right	48

About the small overlap front test

Moderate overlap front: original test

Rating applies to 2014-20 models

Tested vehicle: 2014 Chevrolet Impala LS 4-door

The Chevrolet Impala was redesigned for the 2014 model year. Moderate overlap frontal ratings are assigned by the Institute based on a test conducted by General Motors.

Evaluation criteria	Rating
Overall evaluation
Structure and safety cage
Driver injury measures
Head/neck
Chest
Leg/foot, left
Leg/foot, right
Driver restraints and dummy kinematics

Technical measurements for this test

Evaluation criteria	Measurement
Test ID	VTF1225
Footwell intrusion
Footrest (cm)	4
Left (cm)	8
Center (cm)	10
Right (cm)	7
Brake pedal (cm)	2
Instrument panel rearward movement
Left (cm)	0
Right (cm)	0
Steering column movement
Upward (cm)	-2
Rearward (cm)	-8
A-pillar rearward movement (cm)	0

Evaluation criteria	Measurement
Test ID	VTF1225
Head
HIC-15	230
Peak gs at hard contact	no contact
Neck
Tension (kN)	1.1
Extension bending moment (Nm)	4
Maximum Nij	0.27
Chest maximum compression (mm)	27
Legs
Femur force - left (kN)	0.6
Femur force - right (kN)	1.9
Knee displacement - left (mm)	0
Knee displacement - right (mm)	1
Maximum tibia index - left	0.55
Maximum tibia index - right	0.47
Tibia axial force - left (kN)	2.9
Tibia axial force - right (kN)	4.4
Foot acceleration (g)
Left	48
Right	90

About the original moderate overlap front test

Side: original test

Rating applies to 2014-20 models

Tested vehicle: 2014 Chevrolet Impala LT 4-door with standard front and rear head curtain airbags and standard front and rear seat-mounted torso airbags

The Chevrolet Impala was redesigned for the 2014 model year. Side ratings are assigned by the Institute based on a test conducted by General Motors.

Evaluation criteria	Rating
Overall evaluation
Structure and safety cage
Driver injury measures
Head/neck
Torso
Pelvis/leg
Driver head protection
Rear passenger injury measures
Head/neck
Torso
Pelvis/leg
Rear passenger head protection

Technical measurements for this test

Test ID	VTS1233
B-pillar to longitudinal centerline of driver's seat (cm)	-19.5
Negative numbers indicate the amount by which the crush stopped short of the seat centerline.

Evaluation criteria	Measurement
Test ID	VTS1233
Head HIC-15	316
Neck
Tension (kN)	1.5
Compression (kN)	0.9
Shoulder
Lateral deflection (mm)	40
Lateral force (kN)	1.7
Torso
Maximum deflection (mm)	39
Average deflection (mm)	35
Maximum deflection rate (m/s)	4.20
Maximum viscous criterion (m/s)	0.67
Pelvis
Iliac force (kN)	1.1
Acetabulum force (kN)	2.0
Combined force (kN)	3.1
Left femur
L-M force (kN)	1.1
L-M moment (Nm)	78
A-P moment (Nm)	-21

Evaluation criteria	Measurement
Test ID	VTS1233
Head HIC-15	113
Neck
Tension (kN)	0.2
Compression (kN)	0.6
Shoulder
Lateral deflection (mm)	15
Lateral force (kN)	1.0
Torso
Maximum deflection (mm)	19
Average deflection (mm)	14
Maximum deflection rate (m/s)	2.19
Maximum viscous criterion (m/s)	0.14
Pelvis
Iliac force (kN)	0.4
Acetabulum force (kN)	2.6
Combined force (kN)	2.8
Left femur
L-M force (kN)	0.4
L-M moment (Nm)	108
A-P moment (Nm)	-29

About the original side crash test

Roof strength

Rating applies to 2014-20 models

Tested vehicle: 2017 Chevrolet Impala 1LT 4-door

Overall evaluation
Curb weight	3,745 lbs
Peak force	16,836 lbs
Strength-to-weight ratio	4.50

About the roof strength test

Head restraints & seats

Seat type: Power leather seat

Overall evaluation
Dynamic rating
Seat/head restraint geometry

Technical measurements for this test

Seat type	Power leather seat
Geometry
Backset (mm)	15
Distance below top of head (mm)	17
Seat design parameters
Pass/fail	Pass
Max T1 acceleration (g)	13.1
Head contact time (ms)	56
Force rating	1
Neck forces
Max neck shear force (N)	1
Max neck tension (N)	446

About the head restraint & seat test
Currently, IIHS tests apply only to front seats.

Headlights

Ratings are given for 2 different headlight variations available on this vehicle.

Trim level(s)

Premier trim

Evaluation criteria	Rating
Low-beam headlight type	HID projector
High-beam headlight type	HID projector
Curve-adaptive?	No
High-beam assist?	No
Overall rating
Distance at which headlights provide at least 5 lux illumination:

Low beams
On the straightaway, visibility was inadequate on both sides of the road. On curves, visibility was fair on both right curves and inadequate on both left curves.

The low beams never exceeded glare limits.

High beams
On the straightaway, visibility was fair on the right side of the road and inadequate on the left side. On curves, visibility was inadequate in all 4 tests.

Technical measurements for this test

Evaluation criteria	Measurement
Trim level(s)	Premier trim
Low-beam headlight type	HID projector
High-beam headlight type	HID projector
Curve-adaptive?	No
High-beam assist?	No
Overall rating Applies to 2017-20 models

LOW BEAMS	Average minimum useful illumination distance (5 lux)	Amount glare exceeded threshold
Straightaway right edge	76.0 m	None
Straightaway left edge	42.5 m	None
250m radius right curve, right edge	55.1 m	None
250m radius left curve, left edge	41.6 m	None
150m radius right curve, right edge	48.9 m	None
150m radius left curve, left edge	38.9 m	None

HIGH BEAMS	Average minimum useful illumination distance (5 lux)
Straightaway right edge	129.4 m
Straightaway left edge	99.2 m
250m radius right curve, right edge	57.5 m
250m radius left curve, left edge	55.2 m
150m radius right curve, right edge	49.4 m
150m radius left curve, left edge	47.0 m

Trim level(s)

LS trim
LT trim

Evaluation criteria	Rating
Low-beam headlight type	Halogen projector
High-beam headlight type	Halogen projector
Curve-adaptive?	No
High-beam assist?	No
Overall rating
Distance at which headlights provide at least 5 lux illumination:

Low beams
On the straightaway, visibility was inadequate on both sides of the road. On curves, visibility was inadequate in all 4 tests.

The low beams never exceeded glare limits.

High beams
On the straightaway, visibility was inadequate on both sides of the road. On curves, visibility was inadequate in all 4 tests.

Technical measurements for this test

Evaluation criteria	Measurement
Trim level(s)	LS trim LT trim
Low-beam headlight type	Halogen projector
High-beam headlight type	Halogen projector
Curve-adaptive?	No
High-beam assist?	No
Overall rating Applies to 2017-20 models

LOW BEAMS	Average minimum useful illumination distance (5 lux)	Amount glare exceeded threshold
Straightaway right edge	73.2 m	None
Straightaway left edge	36.4 m	None
250m radius right curve, right edge	42.9 m	None
250m radius left curve, left edge	37.3 m	None
150m radius right curve, right edge	35.1 m	None
150m radius left curve, left edge	32.3 m	None

HIGH BEAMS	Average minimum useful illumination distance (5 lux)
Straightaway right edge	118.6 m
Straightaway left edge	77.7 m
250m radius right curve, right edge	44.9 m
250m radius left curve, left edge	47.7 m
150m radius right curve, right edge	36.0 m
150m radius left curve, left edge	37.6 m

About the headlight evaluation

Front crash prevention: vehicle-to-vehicle

Ratings are given for 2 different trim variations available on this vehicle.

System details

Optional Forward Automatic Braking
Optional Forward Collision Alert

Package name

Optional Premier Confidence Package

Overall evaluation

Applies to 2018-19 models

Superior

with optional equipment

This system meets the requirements for forward collision warning.
In the 12 mph test, this vehicle avoided a collision.
In the 25 mph test, impact speed was reduced by 10 mph.

System details

Optional Forward Collision Alert

Package name

Optional Driver Confidence Package

Overall evaluation

Applies to 2016-19 models

Basic

with optional equipment

This system meets the requirements for forward collision warning.
Autobrake not available.

About the original front crash prevention test

Child seat anchors

Rating applies to 2015-20 models

Evaluation criteria	Rating
Overall evaluation
Vehicle trim	1LS
Seat type	cloth

This vehicle has 2 rear seating positions with complete child seat attachment (LATCH) hardware.

It has 1 additional seating position with a tether anchor, a single lower anchor and the ability to borrow the second anchor from another position.

Note: When anchors are borrowed, they aren't available to use in their designated positions.

Evaluation criteria	Rating
Overall evaluation
Vehicle trim	1LS
Seat type	cloth

Rating icon	Rating
G	Good
A	Acceptable
M	Marginal
P	Poor
	Seating positions that rely on borrowed lower anchors or have only a tether anchor available are not rated.
thether anchor symbol	Tether anchor
lower anchor symbol	Lower anchors
shared lower achors symbol	Lower anchor(s) can be borrowed from adjacent positions(s)
	No hardware available

Details by seating position

Position	Rating
1
1	Tether anchor
	easy-to-find location
	no other hardware could be confused for anchor
	Lower anchors
	too deep in seat
	not too much force needed to attach
	easy to maneuver around anchors
2
2	Tether anchor
	easy-to-find location
	no other hardware could be confused for anchor
	Lower anchors
	1 dedicated anchor and 1 that can be borrowed from seat 3
	too deep in seat
	not too much force needed to attach
	difficult to maneuver around anchors
3
3	Tether anchor
	easy-to-find location
	no other hardware could be confused for anchor
	Lower anchors
	too deep in seat
	not too much force needed to attach
	easy to maneuver around anchors

Technical measurements for this test

Lower anchor A
Open access rated	No
Depth (cm)	2-4
Force (lbs)	27
Clearance angle (degrees)	68
Lower anchor B
Open access rated	No
Depth (cm)	2-4
Force (lbs)	33
Clearance angle (degrees)	69
Tether anchor
Location	Rear deck
Confusing hardware present	No
Has contrasting label within 3 inches of tether anchor	No
Tether anchors can be accessed while seatback is properly positioned for use of LATCH	Not measured

Lower anchor A
Lower latch is shared for this seat position
Lower anchor B
Open access rated	No
Depth (cm)	4-6
Force (lbs)	22
Clearance angle (degrees)	54
Tether anchor
Location	Rear deck
Confusing hardware present	No
Has contrasting label within 3 inches of tether anchor	No
Tether anchors can be accessed while seatback is properly positioned for use of LATCH	Not measured

Lower anchor A
Open access rated	No
Depth (cm)	2-4
Force (lbs)	32
Clearance angle (degrees)	72
Lower anchor B
Open access rated	No
Depth (cm)	2-4
Force (lbs)	27
Clearance angle (degrees)	73
Tether anchor
Location	Rear deck
Confusing hardware present	No
Has contrasting label within 3 inches of tether anchor	No
Tether anchors can be accessed while seatback is properly positioned for use of LATCH	Not measured

About the child seat anchor evaluation