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Stabilus 4B-440017 Deck Lid Lift SupportOE Quality 60-Day Returns
Part #: 4B-440017

Stabilus 4B-440017 Deck Lid Lift Support

39 vehicles fit this part
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Fitment: BMW, 430i, 430i xDrive, 440i, 440i xDrive, M4, 428i, 428i xDrive, 435i, and 435i xDrive
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BMW Lift Support for Trunk and Hatch Access

This Stabilus lift support is built for BMW rear liftgate or trunk applications that require controlled opening and holding force. With a 120 N gas charge, 8 mm rod diameter, and plastic socket end connections, it is a direct-fit style replacement for select BMW 4 Series and M4 models.

Use Stabilus 4B-440017 when replacing a worn support on a BMW 420i, 430i, 430i xDrive, 440i, 440i xDrive, 428i, 428i xDrive, 435i, 435i xDrive, or M4. This part number 4B-440017 is also cross-referenced with Tuff Support 613307 for the same application.

Key Features

  • Stabilus part number 4B-440017
  • 120 N / 27 lb force rating
  • Compressed length: 241.5 mm (9.508 in)
  • Extended length: 403.5 mm (15.886 in)
  • Rod diameter: 8 mm (0.315 in)
  • Tube diameter: 18 mm (0.709 in)
  • Plastic socket rod and tube connections
  • OE-style dimensions for select BMW rear lift support applications

Detailed Description

Stabilus 4B-440017 is a gas spring lift support engineered to restore smooth, controlled movement for the rear opening on select BMW vehicles. The specified compressed and extended lengths, along with the 120 N force rating, help maintain proper support and opening resistance for the application. The plastic socket attachment style and measured end diameters are important for matching the original mounting points on the vehicle.

Compatible With 2014-2016 BMW 428i, 2014-2016 BMW 428i xDrive, 2014-2016 BMW 435i, 2014-2016 BMW 435i xDrive, 2016-2020 BMW 420i, 2017-2020 BMW 430i, 2017-2020 BMW 430i xDrive, 2017-2020 BMW 440i, 2017-2020 BMW 440i xDrive, and 2015-2020 BMW M4. The Stabilus 4B-440017 part number is a useful reference when matching the correct lift support for these BMW 4 Series and M4 fitments.

What It Helps Fix

  • Rear hatch or trunk lid that will not stay open
  • Weak or slow lift support action
  • Uneven or inconsistent opening resistance
  • Drooping rear lid during loading or unloading
  • Noise or binding from a worn gas spring

Installation Notes and Tips

Verify the compressed length, extended length, rod diameter, tube diameter, and socket-style end fittings before installation. Compare the original support to Stabilus 4B-440017 to confirm the correct force rating and mounting style for your BMW 420i, 430i, 440i, 428i, 435i, or M4. Replace only after confirming the vehicle’s existing support uses the same attachment type and dimensions.

Quality Assurance

Stabilus is a recognized OE supplier of gas springs and lift supports, and this part is built to match the dimensional and force requirements listed for the application. Part number 4B-440017 is specified for select BMW rear lift support fitments and is cross-referenced with Tuff Support 613307.

BrandStabilus
Part Number4B-440017
Y
Y
Body0.709
Compressed Length9.508
Compressed Length241.5
Extended Length15.886
Extended Length403.5
Force (N)120
Force Lbs27
Hardware KitNO
Rod ConnectionPLASTIC SOCKET
Rod Dia (IN)0.315
Rod Diameter8
Rod End Attachment Dia (IN)0.394
Rod End Attachment Dia (MM)10
Shaft0.315
Shaft ConnectionPLASTIC SOCKET
Tube ConnectionPLASTIC SOCKET
Tube Dia (IN)0.709
Tube Diameter18
Tube End Attach Dia (IN)0.394
Tube End Attach Dia (mm)10

This part fits 39 vehicles. Search below:

YearMakeModelBody TypePositionNotes
2020BMW420iN/A
2020BMW430iCoupeN/A
2020BMW430i xDriveCoupeN/A
2020BMW440iCoupeN/A
2020BMW440i xDriveCoupeN/A
2020BMWM4CoupeN/A
2019BMW420iN/A
2019BMW430iCoupeN/A
2019BMW430i xDriveCoupeN/A
2019BMW440iCoupeN/A
2019BMW440i xDriveCoupeN/A
2019BMWM4CoupeN/A
2018BMW420iN/A
2018BMW430iCoupeN/A
2018BMW430i xDriveCoupeN/A
2018BMW440iCoupeN/A
2018BMW440i xDriveCoupeN/A
2018BMWM4CoupeN/A
2017BMW420iN/A
2017BMW430iCoupeN/A
2017BMW430i xDriveCoupeN/A
2017BMW440iCoupeN/A
2017BMW440i xDriveCoupeN/A
2017BMWM4CoupeN/A
2016BMW420iN/A
2016BMW428iCoupeN/A
2016BMW428i xDriveCoupeN/A
2016BMW435iCoupeN/A
2016BMW435i xDriveCoupeN/A
2016BMWM4CoupeN/A
2015BMW428iCoupeN/A
2015BMW428i xDriveCoupeN/A
2015BMW435iCoupeN/A
2015BMW435i xDriveCoupeN/A
2015BMWM4CoupeN/A
2014BMW428iCoupeN/A
2014BMW428i xDriveCoupeN/A
2014BMW435iCoupeN/A
2014BMW435i xDriveN/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.