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Hood & Trunk Strut Replacement
 
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Pelican Technical Article:

Hood & Trunk Strut Replacement

Nick Czerula

Time:

1 hour1 hr

Tab:

$100

Talent:

**

Tools:

Small flathead screwdriver, rags, vise grips or spring puller

Applicable Models:

BMW 525i/xi Sedan (2004-07)
BMW 528i/xi Sedan (2008-10)
BMW 530i/xi Sedan (2004-07)
BMW 535i/xi Sedan (2008-10)
BMW 545i Sedan (2004-05)
BMW 550i Sedan (2006-10)

Parts Required:

Support struts, grease

Hot Tip:

Have a friend nearby to help hold hood or trunk lid

Performance Gain:

Hood or trunk will stay open again

Complementary Modification:

Replace in pairs

The hoods on late BMW models have lacked a hood prop rod for some time now. With the omission of the prop rod, a gas charged hydraulic strut was installed. This adds some convenience to opening your hood. Pop the latch and pull it open. There's no need to search for the prop rod and the hood stays fully open. The hood struts attach to ball pivots at each end, on the hood and the body, and are secured with retaining clips.

The hood struts and trunk lift springs hold the weight of the hood / trunk lid when you open it. When they fail, the hood will no longer stay open without additional support. The struts are gas filled, but when they fail oil will sometimes leak out. You may notice oil stains on the strut cylinder. If this is the case, replace them before they totally fail. There is nothing worse than having the engine hood come down on top of you while you are working on your E60. The trunk springs are generally OK and rarely need replacement. They usually only require removing when you're performing bodywork on the car.

Remember that your car may have been serviced before and had parts replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve, as they grow older. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

The engine hood is quite heavy. Be sure to have an assistant available when replacing the hood support struts.

Hood Support Struts:
Hood Support Struts: When replacing the hood support struts (red arrow), I find it easiest to start by disconnecting the lower spring clip, then the upper.
Figure 1

Hood Support Struts: When replacing the hood support struts (red arrow), I find it easiest to start by disconnecting the lower spring clip, then the upper. I leave the bottom connected until the upper is removed. Support the hood with a screw jack.

Hood Support Struts: Working at the top of the support strut, use a small flathead screwdriver and move the retaining spring (red arrow) up to the top of the socket.
Figure 2

Hood Support Struts: Working at the top of the support strut, use a small flathead screwdriver and move the retaining spring (red arrow) up to the top of the socket. You do not have to remove it, just move it up far enough so the strut will come off the ball.

Hood Support Struts: Working at the bottom of the support strut, lever the bottom retaining clip down to disengage it.
Figure 3

Hood Support Struts: Working at the bottom of the support strut, lever the bottom retaining clip down to disengage it. Once disengaged, slide the top of the support strut off the pivot.

Hood Support Struts: Pull the support strut (red arrow) off the stud.
Figure 4

Hood Support Struts: Pull the support strut (red arrow) off the stud. Then pull it off the lower ball end and remove it from the vehicle. Clean the support strut mounting points and apply a small amount of grease. Then install the new support struts. Be sure that the retaining clips lock when installing. Try to pull the strut off to confirm it is properly engaged.

Trunk Support Springs:
Trunk Support Springs: Working in the trunk on the left side, using a flathead screwdriver, twist the trim panel locks (green arrows) counterclockwise 90°.
Figure 5

Trunk Support Springs: Working in the trunk on the left side, using a flathead screwdriver, twist the trim panel locks (green arrows) counterclockwise 90°. Then remove them (inset).

Trunk Support Springs: Lift the trunk carpet panel up (inset) and hold it.
Figure 6

Trunk Support Springs: Lift the trunk carpet panel up (inset) and hold it. Then remove the trim panel cover from the trunk. Pull the side closest to the trunk opening away from the fender and rotate it toward the spare tire to remove it.

Trunk Support Springs: The trunk support spring (red arrow) attaches to an indented body attachment point (blue arrow) and a round bushing on the trunk lid arm (yellow arrow).
Figure 7

Trunk Support Springs: The trunk support spring (red arrow) attaches to an indented body attachment point (blue arrow) and a round bushing on the trunk lid arm (yellow arrow).

Trunk Support Springs: Support the trunk lid.
Figure 8

Trunk Support Springs: Support the trunk lid. To remove the spring, use a spring puller or a pair of vise grips. I advise against the vise grips unless you have experience with this method, as the spring is under great tension and can go flying. Pull the body side (red arrow) of the spring out of the attachment point. Then detach it from the bushing on the trunk lid. Reverse the steps to install the new spring. Be sure that the spring is in the same attachment point on the body as it was earlier.

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Comments and Suggestions:
Bill Comments: I have an '06 525i. The struts are not working, so I purchased them aftermarket at AutoHaus. I got them today and they look OEM to me. However, no matter how I try, the struts will not compress. They're not installed yet, but was wondering if it's the weight of the hood that will do it the compression.
July 13, 2016
  Followup from the Pelican Staff: I would call Autohaus, maybe they are the wrong parts.


Give our parts specialists a call at 1-888-280-7799 to get the right ones. - Nick at Pelican Parts
 
Jane Fox Comments: You say that there's nothing worse than having the hood come down while you're working, and isn't that the truth! My brother recently looked at his car and it appears that oil is leaking from his gas struts. We're going to try to repair it this weekend, so I appreciate this article's basic overview.
June 25, 2015
  Followup from the Pelican Staff: Thanks for the feedback. Glad we could help.
- Nick at Pelican Parts
 

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Page last updated: Sat 12/3/2016 02:40:42 AM