Renntech EVM GLE53 Installation
The gromits to pass through are on the sides of the trunk and contain existing wires. I ended up having a local shop install this module for me since everything I saw for online instructions wanted a lift to get to inside the fenders to connect the actuators. Here are a couple pics from the installer, hopefully it helps.
Left side of Trunk
Right side of trunk
Module hidden on right side of trunk

I know it helps comfort and other modes but if you’re already on the most aggressive mode, does this make it even more aggressive in anyway?
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So I’m also guessing there is no other way to get the flaps open 100% of the time besides a module like this?
BMW you have a car in Sport+ and remove the flap fuse and they are stuck open all day for free and its a 10 second job thats also reversible in another 10 seconds too.




So I’m also guessing there is no other way to get the flaps open 100% of the time besides a module like this?
BMW you have a car in Sport+ and remove the flap fuse and they are stuck open all day for free and its a 10 second job thats also reversible in another 10 seconds too.
not sure if it is compatible with the GLE 53 though.




So I’m also guessing there is no other way to get the flaps open 100% of the time besides a module like this?
BMW you have a car in Sport+ and remove the flap fuse and they are stuck open all day for free and its a 10 second job thats also reversible in another 10 seconds too.
On my 53, open is open and closed is closed with the onboard switches, so how is this different?
I'm asking the forum, adding to your questions.
So I’m also guessing there is no other way to get the flaps open 100% of the time besides a module like this?
BMW you have a car in Sport+ and remove the flap fuse and they are stuck open all day for free and its a 10 second job thats also reversible in another 10 seconds too.
On my 53, open is open and closed is closed with the onboard switches, so how is this different?
I'm asking the forum, adding to your questions.
on the 2024 we can select open exhaust valve no matter what mode were in.
i really want to spend money on this. But all the youtube clips compare comfort to sport plus. I want to see sport plus with and without it.




On my 53, open is open and closed is closed with the onboard switches, so how is this different?
I'm asking the forum, adding to your questions.
Awesome thanks.




I can certainly hear a difference at 1800 RPM around town.
I'll take a drive today and see if they seem fully open when I open them.
The other side of that, is that mashing the throttle at any RPM, at any setting, will open the flaps.
It does get louder above 3500 RPM, but I thought that was just where my six started to sing. Which it does.




On my 53, open is open and closed is closed with the onboard switches, so how is this different?
I'm asking the forum, adding to your questions.
I can certainly hear a difference at 1800 RPM around town.
I'll take a drive today and see if they seem fully open when I open them.
The other side of that, is that mashing the throttle at any RPM, at any setting, will open the flaps.
It does get louder above 3500 RPM, but I thought that was just where my six started to sing. Which it does.
I wanted to check out your statement "Factory settings do not allow the exhaust flaps to be fully opened unless a certain speed/RPM is reached." And to see if I could make them open and close at will.
My results (a '21): Mine open whenever I want, at whatever speed. On the gas, off the gas, light throttle, heavy throttle - I think I'm in control of the flaps. (I can't say definitively that it's true at 80 mph with the windows down, though.)
What I do think happens in your scenario, is that there are only two options: Powerful and Balanced. You can switch into Powerful and the flaps open according to that control.
But on Balanced, flaps will stay closed but switch to Powerful if you stand on it, or when "a certain speed/RPM is reached." I'll add "gas pedal velocity" to that equation.
They definitely open in Comfort, at 1800 RPM, 20 mph, if I mash the pedal. Or 3500, 50mph, Comfort mode, Balanced exhaust setting.
So I'm wondering further about the value of this exhaust kit.
It seems to me that it offers the same functionality as the Mercedes exhaust option, but without the "automatically open in balanced" feature.
And I can't see how it would even operate unless you had the optional Mercedes exhaust.
Again, asking the forum not you. Curious.
EDIT: I just went back and read the Renntech advert. I see that @benzbell just copied and pasted the text from their site.
I generally respect Renntech, but I really question their claim. Their videos are certainly don't support their narrative.
But before I'd spend $800, I'd want to place a GoPro to verify that my exhaust flaps close when I have them open. Or something.
Last edited by mikapen; Jan 1, 2024 at 07:52 PM. Reason: Add "EDIT:"
I wanted to check out your statement "Factory settings do not allow the exhaust flaps to be fully opened unless a certain speed/RPM is reached." And to see if I could make them open and close at will.
My results (a '21): Mine open whenever I want, at whatever speed. On the gas, off the gas, light throttle, heavy throttle - I think I'm in control of the flaps. (I can't say definitively that it's true at 80 mph with the windows down, though.)
What I do think happens in your scenario, is that there are only two options: Powerful and Balanced. You can switch into Powerful and the flaps open according to that control.
But on Balanced, flaps will stay closed but switch to Powerful if you stand on it, or when "a certain speed/RPM is reached." I'll add "gas pedal velocity" to that equation.
They definitely open in Comfort, at 1800 RPM, 20 mph, if I mash the pedal. Or 3500, 50mph, Comfort mode, Balanced exhaust setting.
So I'm wondering further about the value of this exhaust kit.
It seems to me that it offers the same functionality as the Mercedes exhaust option, but without the "automatically open in balanced" feature.
And I can't see how it would even operate unless you had the optional Mercedes exhaust.
Again, asking the forum not you. Curious.
EDIT: I just went back and read the Renntech advert. I see that @benzbell just copied and pasted the text from their site.
I generally respect Renntech, but I really question their claim. Their videos are certainly don't support their narrative.
But before I'd spend $800, I'd want to place a GoPro to verify that my exhaust flaps close when I have them open. Or something.








But from my report above, their description of the stock exhaust valves doesn't fit my experience.
So I am wondering if this is for the Great Britain market, where they have tighter restrictions on exhaust noise.
Or, what the heck does it do? What is improved in real life?
here is my experience. Well, you will hear the difference in comfort mode at low speed (in comfort). To me, overall the sound gets lower tone which I don't like. The original sound of the 53 seems to be in high pitch. It's very pleasing for my ears. To turn the valve open all the time it was like trying to be v8 63. The tone is lower a bit. You wont get the v8 sound anyway. The pop and bang is also have lower tone. It was "Bang" with original and then "Bong" with the module.
In default mode, even though the device claims it is factory setting. The vehicle will take control like there is no EVM installed. To me, it also sounds difference. I love the engine rev in 3rd and 4th gear when turbo sound kick-in at high rpm. The long "Weeeeeeeeeeeed" sound. After I installed the EVM, the engine rev and turbo sound cause less noise. Too quiet compared to stock. I don't know why but it happened. I search over the internet if the 53 has artificial engine sound through speakers and if somehow the shop forgot to connect some cables so the sound is missing LOL.
So, I prefer the original exhaust sound of the 53. The higher pitch tone. The lovely "Bang" and "Weeeeeed"
ps. You wont get the pop and bang in other mode except sport+ even if the EVM open the valve all the time. The car wont bang in other modes.





