Frunk Auto-Open - using gas struts

Frunk Auto-Open - using gas struts

Anyone try these. Looks like an easy, inexpensive way to have the frunk fully auto-open with the App:

Evannex also sells something similar:

Syed.Hosain | January 4, 2019

This is very easy to do indeed - I replaced the trunk ones on my old Infiniti M45 with similar good results.

I do not know what the strut force is on the stock Tesla ones - the force values (in Newtons generally) are usually marked on the strut.

Just pick something (various sources sell Nitride shaft ones for half the cost of the ones at Evannex) that is strong enough to lift the frunk but not too strong - that could stress the hinge or bend the frunk metal near the upper strut mount point. The correct "closed" and "open" length is also important to avoid similar problems.

Brady.Walters | January 4, 2019

Does anyone sell a similar kit for the trunk? It would be great to have both the trunk and the trunk open fully when deployed.

dkabq | January 4, 2019

I used the same/similar lifts BOXI instead of the ECCPP ones. 2pcs Front Hood Gas Charged Lift Supports for Jeep Grand Cherokee 2005 - 2010 55394472AA, 68025360AA these were available on amazon(no longer) and Walmart website(sold out there as well).

They were very easy to install, There is even a video out there that shows you how. They do open the front via the app, but I like that it opens with the keyfob as well and is easier as you approach if your hands are full. The size appears identical(length and fit to attachments) to the Tesla stock lifts. But they have more lift(compression) and you need to use grater force to close. The lifts raised the hood about 1/8- 1/16 inch because they have more force behind them. A lot of folks feel the that the little extra lift of the hood makes it a nicer fit to rim around the funk. But if you model 3 is older the seal will have formed to the current lifts and you may have to work with the seals to make sure they seal well. The hood springs up quite well but it is not a slow easy lift, it kind of springs open.

dkabq | January 4, 2019

oops greater not grater(doesn't slice or dice either)

Honestly the spell check changed it twice

lbowroom | January 4, 2019

evannex has done the research and selected the right ones. They buy them and sell them to you for twice the price. They're the ones who sell the center cap and lug nut covers for the aero wheels for $100 when Tesla sells them direct for $50, right?

drbob | January 4, 2019

I ordered the ones on Amazon (link at the top) for $15 with free shipping.

Would be interesting if you could do the same for the trunk :-)

riccifrance | January 4, 2019

According to the amazon automotive, those are not the right fit. I think they are a little bit shorter..
Let us know how they work.

M3phan | January 4, 2019

With the trunk being larger/heavier than the super light frunk, would the assumed larger/stronger autolift struts for the trunk be too hard to close?

RES IPSA | January 4, 2019

I have literally never opened my frunk. The delivery person did at the time of delivery to show it to me, but since then I have not opened it. A small, useless space, in my opinion. A perfect place to put a "donut" or full spare tire. Much better use of the space...

jacklondon413 | January 5, 2019

I use my frunk almost exclusively. I use it for my work and gym bag and groceries. I rarely use the trunk, only sometimes to get my portable vacuum cleaner from the sub trunk.

jrlevy | January 5, 2019

i1Tesla did a video on this project on YouTube a few months ago.

Too lazy to find the video though.

sheldon.mike1010 | January 5, 2019
ReD eXiLe ms us | January 5, 2019

Most who request auto open tend to also require auto close. That action is illegal. Think about it. Mercedes-Benz, Lincoln, and Cadillac cars would have had that function decades ago if it were legal. The front 'hood' has to be manual, even for a frunk.

sheldon.mike1010 | January 5, 2019

"The front 'hood' has to be manual, even for a frunk."

ReD: Do you mean manual open or manual close is illegal - which?

ReD eXiLe ms us | January 5, 2019

Both must be manual. There are no cars with automatc closing or opening hoods at the front from the OEM. They are not allowed for 'safety' reasons. Particularly for the safety of first responders attempting to put out a fire or extract crash victims.

Magic 8 Ball | January 5, 2019

@ReD I fought this battle from a different angle but I never thought about no automatic opening front "hoods" from other manufactures and legal implications, interesting.

Magic 8 Ball | January 5, 2019

Correction, my argument was about legal implications but just the switching of liability from mnfr. to consumer when consumer makes mods like this.

dkabq | January 5, 2019

@ReD eXiLe ms us Do you have the specific requirement I could only find the Title 49 transportation requirement for double latching. Is it a state or federal requirement?

Code of Federal Regulations
Title 49 - Transportation

§ 571.113
Standard No. 113; Hood latch system.
S1. Purpose and scope. This standard establishes the requirement for providing a hood latch system or hood latch systems.
S2. Application. This standard applies to passenger cars, multipurpose passenger vehicles, trucks, and buses.
S3. Definitions. Hood means any exterior movable body panel forward of the windshield that is used to cover an engine, luggage, storage, or battery compartment.
S4. Requirements.
S4.1Each hood must be provided with a hood latch system.
S4.2A front opening hood which, in any open position, partially or completely obstructs a driver's forward view through the windshield must be provided with a second latch position on the hood latch system or with a second hood latch system.

kaffine | January 5, 2019

ReD eXiLe ms us | January 5, 2019
Most who request auto open tend to also require auto close. That action is illegal. Think about it. Mercedes-Benz, Lincoln, and Cadillac cars would have had that function decades ago if it were legal. The front 'hood' has to be manual, even for a frunk.

No they would more likely make it so the owner can't open the hood not make it easier for them. How many Mercedes, Lincoln or Cadillac owners ever open their hoods. Remember just because no one does something doesn't mean it is illegal.

one.more.again | January 5, 2019

The Rivian has auto-opening front trunk.

Magic 8 Ball | January 5, 2019

Does not make it illegal but I have never even seen it as an option. Seems like a market exists so it makes me wonder why I have never seen a front hood that did not require a person to, at least, get out and “touch” the hood to make it open. Maybe not a law but a liability no one else chose to take on?

one.more.again | January 5, 2019

Auto opens at about 12:20 on this video.

Magic 8 Ball | January 5, 2019

The Rivian looks like it is using linear actuators so while it is "automatic" I believe it may be different in that it looks like the hood can stop (be constrained) anywhere in travel if the "switch" is "off". I wonder if it requires a deadman type switch.

I am not saying it has not existed before but I wonder why we have not seen auto pop up hoods before. ReD mentioned EMT concerns, but, is that now obsolete because there isn't a gas engine to catch on fire?

billlake2000 | January 5, 2019

Laws that say, put on a front license plate.

Laws that say, don't tint this or that piece of glass.

Laws that say, don't have your hood auto pop up.

Laws that say, well, chime in with YOUR favorite example.

ODWms | January 5, 2019

The price on the Evannex struts is laughable. I paid about $14 shipped for the ones I used and posted on the site few months back. Perfectly pleased with the results as I use the frunk daily, usually multiple times a day.

RedShift | January 5, 2019

I paid $15 for the BOXI struts mentioned here on Amazon. They are really good. Love the convenience of auto opening frunk. Super easy to install.

ODWms | January 6, 2019

It seems some of these companies way overcharge for some of the simplest things. Console wraps for $49, $59? Crazy. I just received and installed from Amazon a high quality carbon fiber style vinyl wrap for $14.95 shipped. Came out nice.

drbob | January 8, 2019

Anyone know if there is a similar setup for the trunk?

jamespompi | January 8, 2019

@ODWms I agree, most of these aftermarket sellers are out of control with the prices. My favorite is the $80 screen protectors.. lol

ODWms | January 8, 2019


hector | January 8, 2019

I bought the ones listed in the OP's post after reading this thread...

...and got them yesterday. I installed them in about 5 minutes. And they work fine. There's extra pressure when closing the frunk for about the first foot of travel, after that, the hood isn't that hard to close since the struts start to swivel and face forward, toward the front of the car and not upward. I'm a little nervous about bending the hood, but after looking at this video by i1Tesla, after 5 months, the hood is still perfect.

I just ordered the struts in his video, which appear to be the similar to the ones I got and the same ones that evannex repackages and sells to see how they compare. I'll get them next week and update.

drbob | January 12, 2019

Here is a photo of the $15 Amazon Struts compared with the OEM struts.

Took less than 5 minutes to install. Use a small screwdriver to take off the old struts (insert in the small slot at the tip of the strut)

Amazon Link:

PS: i1Tesla did a great video on this:

ODWms | January 12, 2019

Here is a 5 month follow up on the frunk mod by Brian at A1 Tesla:

ODWms | January 14, 2019

Frunk mod was announced, to varying levels of desire (and caution). Now Brian at A1 Tesla has announced the long awaited modification for the rear trunk. I have already ordered and will install as soon as I can get my grubby mitts on the components:

drbob | January 14, 2019

Brian is the man. Great modification for the trunk (wonder if should wait for the 5 month follow up? :-)

ODWms | February 2, 2019

It’s done. Now front AND rear auto opening:

Most convenient mods I’ve done so far on my P3D+. Credit to Brian at A1 Tesla on YouTube for the ideas.

roger.klurfeld | February 2, 2019

I bought the ECCPP struts and had the same experience as @Hector. Works great. Easy and cheap to do.