i had top of strut spacers installed on a c40 (1" lift). it added a lot of body roll, reduced stability, reduced travel, and added squeaks.

i would rather see about fitting wider diameter tires on. see if +1" diameter fits (ie. 245/35r20 to 245/40r20) to get 0.5" lift.

 

Oooh should look taller like an L Urus after the mod!

 

Last thing I'd ever do is move a car's center of gravity up without any real changes to the suspension to accommodate it. Moment arm is a powerful thing.

 

I guess it’s kind of like adding lowering springs without adding sport shocks, just in the other direction in this case...
If I had an M50 or e40 with the M Sport adaptive suspension and wanted to lower it, the only way I’d do it would be with the KW Coilovers:

Adaptive KW DDC coilover kit for the BMW i4 eDrive40 and BMW i4 M50 Gran Coupé (G26)

A winning team: The adaptive KW DDC plug & play coilover kit and the electric BMW i4 Drive (G26). Nevertheless, it should be remembered that our electrically adjustable KW DDC plug & play c…

blog-int.kwautomotive.net

Lowering a vehicle with lowering springs without adding shorter, stiffer Bilstein etc. sport shocks will mean that the BMW OEM shocks will blow/wear out sooner.

 

From the SPACCER website:
Why does SPACCER improve driving behavior?
-If you raise a motor vehicle, there must always be at least 4 cm of remaining spring travel. With all vehicles, the camber, track or axle geometry usually never changes. Why? Because the lift is carried out within the tolerances approved by the TÜV guidelines. Every time a new type of vehicle is approved, the manufacturer must prove that the vehicle can be lowered by about 5 cm and also raised. There are legal provisions for this that every manufacturer must adhere to! This means that every manufacturer sells the car in a medium residual spring travel position for series delivery. Now many suspect that a higher suspension will make the driving behavior spongy or that the car will tend to rock more easily. However, this is not the case. By raising it, the car is much more stable in the border area. Why? Because the shock absorber has less remaining spring travel due to the lift. A car before the lift, for example, has a maximum downstroke of 10cm. After a 4cm lift, this is only 6cm. The car can thus only rebound 6 cm when driving a wagging course and thus tends to roll 4 cm less. During normal driving, however, you will not notice any of this, as a vehicle always works with a regular suspension travel of 4-5 cm. At the limit, for example when it comes to an abrupt evasive maneuver, you will notice that the car is now really safe in the hand and does not break out as quickly as in the standard condition.

 

They're hardly going to write anything negative about the product. To be taken seriously there needs to be independent reviews of before and after by someone with a driving background and credibility.

 

Moment arm is still increased for causing tire problems no matter the tech writeup from the company most likely to benefit from additional sales.

You do you, though.

 

The car commonly rides +1 to 10 cm higher while handling large bumps or undulations in the road. You don't normally fly off into the ditch when that happens.
Not that big a deal for the amounts OP wants. Lots more margin of safety built into consumer products.

 

Why not buy an iX or Neue Klasse iX3 in addition to your i4 - and use the SUV when you need clearance ?
I think the 12.5 cm road clearance is one big reason why the i4 drives better than any other EV (Except Taycan that also have very low clearance)

If you cannot afford an additional BMW SUV - All Teslas have higher clearance than the i4 - You don't need to pay much for a used Tesla today.

 

Well, the answer is maybe that he doesn't need or can afford a second car, and even if he could, maybe he can't store it. Also, how is that a solution, except if he would ditch the i4 and replace it with an iX? I mean, "when you need clearance" doesn't really work, or did you think he should take the i4 and every time he encounters a speed bump he should turn around and change car???? 🤣 🤣 🤣

But sure, it is not a secret that the i4 is pretty low, it's in the specs, so why buy it if the 12.5 cm (5") is not enough.

 

Maybe someone should hit up Adrian Newey for his opinion. I have no educated opinion on this but I look forward to getting to the bottom of it!

 

As was mentioned the first time you asked this question, you’re not going to find any advice/experience on this topic. Your use case is much too specific.

It unfortunately sounds like you need an SUV.

 

Hello all,

I came to the realization that the car had already been fitted with H&R lowering springs and links (H&R Sport Springs for BMW i4 M50 (G26) | H&R Special Springs, LP.), hence why I've been having problems on speed bumps etc. I bought the car used and the salesman had no idea that it was lowered. also has H&R spacers which i just realized, always wondered why it looked so good compared to all the other M50's he had on the lot (although they had the 19's while mine had 20's which is why i thought it looked so much better.

So follow up question now to you guys since you seem to be very well versed in BMW and this is my first BMW, and the local BMW dealer started talking about voiding warranty when i brought up bringing it back to stock.

What parts do i need to bring the suspension back to stock? including any one time use nuts and bolts.

Chat GPT gave me the following (with many prompts and my own research) but would appreciate if anyone can verify. my car has the adaptive M suspension which i believe comes standard on the M50 but not sure.

Component	Part Number	Description	Quantity	Notes
Front Coil Spring (Left & Right)	31-33-5-A2A-2E7	OEM front coil spring for Adaptive M Suspension	2	Replace both front springs to restore original ride height.
Strut Mount Bolt (Guide Support Screw)	07-14-6-884-194	Bolt securing the strut mount to the chassis	6	Not reusable; 3 per side recommended.
Rear Ride Height Sensor Link – Left Rear	37-14-6-895-649	Holder for rear left ride height sensor	1	Replaces adjustable lowering link on the left side.
Rear Ride Height Sensor Link – Right Rear	37-14-6-895-650	Holder for rear right ride height sensor	1	Replaces adjustable lowering link on the right side.

Appreciate your help

 

Looks good. Confirm with the BMW dealer with your VIN the parts before you place the order. Those are all the components needed. FYI, rear links take 10 minutes to swap, the front springs require specialized equipment/clamp so you might just get this done at a shop.

 

Appreciate your feedback. Thing is where i live they get extremely excited to void the warranty if i bring up anything to do with replacing the springs as they wont sell me the springs alone just the complete suspension assembly, and are unwilling to install the OEM springs if i bought them from somewhere else, and if i go to a 3rd party mechanic they will void the warranty. some dumb ****

 

Very easy first drive thru the route in another car, if no speed bumps repeat the trip with the i4.
If two cars is not the solution the iX3 Neue klasse is a possible solution, or probably also the Neue Klasse i3.

The three EV's with very low clearance : BMW i4, Porsche Taycan, Mercedes EQC.