Frame for 2018 Buick Regal Sportback
1. Rail Assembly 
2. Aperture Panel 
3. Roof Panel 
4. Outer Center Pillar 
5. Fender Mtg Bkt 
6. Outer Wheelhouse 
7. Windshield Pillar Trim 
8. Cowl Grille 
9. Rear Floor Pan 
10. Rear Floor Pan 
11. Quarter Panel 
12. Rear 
13. Lower Panel 
14. Rail Assembly Upper Reinforced 15. Frame Side Member Reinforcement No.
Part # / Description / Price
Price
2
Driver Side Front Compartment Side Rail Bracket 
GM
GM Positions: Left
Notes: PARTS: Part included rail assembly.
Description: Lower rail. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $13.84
$9.09
MSRP $13.84
$9.09
2
Rail Assembly Front Bracket GM
GM Positions: Right
Notes: PARTS: Part included rail assembly.
Description: Lower rail.
MSRP $9.73
$6.39
MSRP $9.73
$6.39
3
Rail Assembly Rear Bracket GM
GM Positions: Right
Notes: PARTS: Part included rail assembly.
Description: Lower rail.
MSRP $9.45
$6.20
MSRP $9.45
$6.20
4
Driver Side Front Engine Compartment Inner Rail Extension GM
GM Positions: Left
Notes: PARTS: Part included rail assembly.
Description: Lower rail. Front center. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $80.03
$52.62
MSRP $80.03
$52.62
4
Passenger Side Front Compartment Inner Side Rail Extension GM
GM Positions: Right
Notes: PARTS: Part included rail assembly.
Description: Lower rail. Front center. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $80.03
$52.62
MSRP $80.03
$52.62
4
Front Passenger Side Wheelhouse Panel Extension GM
GM Positions: Front right outer
Description: Front outer. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $87.17
$57.37
MSRP $87.17
$57.37
4
$47.90
5
Rail Assembly Upper Reinforced GM
GM Positions: Left
Notes: PARTS: Part included rail assembly.
Description: 2021-23, lower rail. 2024-26, lower rail.
MSRP $31.13
$20.44
MSRP $31.13
$20.44
5
Rail Assembly Upper Reinforced GM
GM Positions: Right
Notes: PARTS: Part included rail assembly.
Description: 2021-23, lower rail. 2024-26, lower rail.
MSRP $13.03
$8.56
MSRP $13.03
$8.56
6
Driver Side Front Compartment Side Rail Rear Reinforcement GM
GM Positions: Left
Notes: PARTS: Part serviced with rail assembly.
Description: Lower rail, #3. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $21.08
$13.84
MSRP $21.08
$13.84
6
Rail Assembly Lower Reinforced GM
GM Positions: Right
Notes: PARTS: Part serviced with rail assembly.
Description: 2021-23, lower rail, #3. 2024-26, lower rail, #3.
MSRP $17.68
$11.61
MSRP $17.68
$11.61
8
Passenger Side Underbody Rear Side Rail GM
GM Positions: Rear right
Description: Sportback, 4-link suspension. Helps strengthen and support your vehicle's underbody
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
.
Collision parts are designed to help promote proper and safe repair
$238.99
$238.99
8
Passenger Side Underbody Rear Side Rail GM
GM Positions: Rear right
Description: Sportback, 5-link suspension. Tourx. Helps strengthen and support your vehicle's underbody
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
.
Collision parts are designed to help promote proper and safe repair
$333.95
$333.95
9
Driver Side Front Engine Compartment Inner Rail Extension GM
GM Positions: Left
Description: Front inner. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $79.13
$52.03
MSRP $79.13
$52.03
9
Passenger Side Front Compartment Inner Side Rail Extension GM
GM Positions: Right
Description: Front inner. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $79.13
$52.03
MSRP $79.13
$52.03
9
Driver Side Front Compartment Front Side Rail Reinforcement GM
GM Positions: Front left inner
Description: Lower rail. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $31.41
$20.62
MSRP $31.41
$20.62
11
Driver Side Floor Panel Number 1 Cross Bar Reinforcement GM
GM Positions: Left
Description: Center-lower. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $21.46
$14.09
MSRP $21.46
$14.09
11
Passenger Side Floor Panel Number 1 Cross Bar Extension GM
GM Positions: Right
Description: Center-lower. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $19.49
$12.80
MSRP $19.49
$12.80
12
Driver Side Front Compartment Outer Side Rail Extension GM
GM Positions: Left
Description: Lower rail, side upper. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $27.12
$17.81
MSRP $27.12
$17.81
12
Passenger Side Front Compartment Outer Side Rail Extension GM
GM Positions: Right
Description: Lower rail, side upper. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $26.34
$17.30
MSRP $26.34
$17.30
13
Driver Side Front Compartment Side Rail Rear Extension GM
GM Positions: Left
Description: Lower rail, side lower. Rear lower. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $52.71
$34.66
MSRP $52.71
$34.66
13
Passenger Side Front Compartment Side Rail Rear Extension GM
GM Positions: Right
Description: Lower rail, side lower. Rear lower. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $48.90
$32.16
MSRP $48.90
$32.16
14
Driver Side Front Engine Compartment Front Rail Reinforcement GM
GM Positions: Left
Description: Lower rail. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $31.87
$20.93
MSRP $31.87
$20.93
14
Passenger Side Front Compartment Front Side Rail Reinforcement GM
GM Positions: Right
Description: Lower rail. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $25.88
$16.99
MSRP $25.88
$16.99
15
Driver Side Front Compartment Outer Side Rail GM
GM Positions: Left
Description: Lower rail. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $46.35
$30.47
MSRP $46.35
$30.47
15
Passenger Side Front Compartment Outer Side Rail GM
GM Positions: Right
Description: Lower rail. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $47.08
$30.95
MSRP $47.08
$30.95
16
Upper Reinforced Bracket GM
GM Positions: Left
Description: Lower rail. Apron assembly.
MSRP $55.99
$36.82
MSRP $55.99
$36.82
16
Rail Assembly Brace GM
GM Positions: Right
Description: Lower rail. 2024-26, apron assembly.
MSRP $53.67
$35.29
MSRP $53.67
$35.29
17
Underbody Rear Side Rail GM
GM Positions: Rear left
Description: Sportback, 5-link suspension. Tourx. Helps strengthen and support your vehicle's underbody
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
.
Collision parts are designed to help promote proper and safe repair
17
Underbody Rear Side Rail GM
GM Positions: Rear right
Description: Sportback, 5-link suspension. Tourx. Helps strengthen and support your vehicle's underbody
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
.
Collision parts are designed to help promote proper and safe repair
17
Rear Underbody Side Rail GM
GM Positions: Rear left
Description: Sportback, 4-link suspension. Helps strengthen and support your vehicle's underbody
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
.
Collision parts are designed to help promote proper and safe repair
MSRP $56.97
$37.46
MSRP $56.97
$37.46
17
Rear Underbody Side Rail GM
GM Positions: Rear right
Description: Sportback, 4-link suspension. Helps strengthen and support your vehicle's underbody
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
.
Collision parts are designed to help promote proper and safe repair
MSRP $58.52
$38.48
MSRP $58.52
$38.48
18
MSRP $66.78
$43.91
18
MSRP $60.72
$39.93
19
Driver Side Front Compartment Side Rail Bracket GM
GM Positions: Left
Description: Lower rail. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $9.26
$6.08
MSRP $9.26
$6.08
19
MSRP $7.01
$4.60
20
Passenger Side Front Compartment Front Side Rail Reinforcement GM
GM Positions: Right
Description: Lower rail. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $31.41
$20.62
MSRP $31.41
$20.62
21
Driver Side Front Compartment Side Rail Plate GM
GM Positions: Left
Description: Lower rail. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $10.39
$6.82
MSRP $10.39
$6.82
21
Passenger Side Front Compartment Side Rail Plate GM
GM Positions: Right
Description: Lower rail. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $10.16
$6.67
MSRP $10.16
$6.67
22
Passenger Side Front End Sheet Metal Diagonal Brace Reinforcement GM
GM Positions: Right
Description: Lower rail. Helps reinforce and align your vehicle's radiator support panel reinforcement
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $11.35
$7.46
MSRP $11.35
$7.46
22
Driver Side Front End Sheet Metal Diagonal Brace Reinforcement GM
GM Positions: Left
Description: Lower rail. Helps reinforce and align your vehicle's radiator support panel reinforcement
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $11.19
$7.35
MSRP $11.19
$7.35