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      08-17-2024, 08:09 PM   #1
SCshaySC
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Suspension advice/help needed

So I’m not your typical forum member. I’m a 55 year old female that loves cars and I always have. I have a 2017 M240i and had a flat. I took off the wheel so I could look at the tire and saw that the strut had a torn bushing(I think that’s what it’s called) at the top. Name:  IMG_2134.jpeg
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I checked the other side and it is the same and also leaking. These are the rear struts.
This is a daily driver so my question is should I replace with OEM or can I get a comfortable coil over that could do the job?
I am the 3rd owner so I don’t know anything about the cars past. I bought it in 2021 with 27800 miles on it and now it has 38000 miles. All other suspension is stock. I have MHD stage 1 and just some appearance mods at the moment. Thanks for any help and opinions. Sorry if the picture is huge. I previewed it and don’t know how to resize.
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      08-18-2024, 05:34 PM   #2
TechnicRogue
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Most coilovers will be stiffer than stock. I had a set of KW DDCs on mine which plug into the factory EDC and feel really similar to OEM in comfort mode, but they're expensive.
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      08-18-2024, 08:50 PM   #3
dradernh
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Larger photos make it easier for us to see what needs to be seen, so a large one like yours is helpful. Circling the issue helps, too!

The part that you've circled is the bump stop, and it needs replacing. In the spring/shock/bump stop assembly, it's the final piece preventing the car's suspension from bottoming-out. It's likely the reason the shocks are leaking.

If the rear shocks are leaking, then they need replacement, too. My advice would be to simply replace the shocks and bump stops with OEM parts. The springs generally would never need replacement at 38K, but given the existing damage they should receive a careful examination.

If the rear shocks and bump stops are in this condition, then an examination of the front springs/struts/bump stops is in order, too.

An installed full set of quality coilovers (not the $1K stuff) is fairly pricey and usually of benefit only if you're going to exercise the car rather hard: track, autocross, or aggressively on back roads. Along with them, many owners get front camber places, have the front and rear camber adjusted, and finally get an alignment done to take full advantage of all the parts. Coilovers also allow the car to be corner-balanced by adjusting the heights of each corner of the car. Doing all of that will turn you car into something that is much more responsive to your steering inputs; again, something that normally comes into play only when pushing the car much harder than is normal on public roads. One exception to that is going around potholes, where negative front camber may allow the observant driver an opportunity to flick the steering wheel away and back to straight ahead, making it easy to miss the hole in the road. Finally, a set of appropriate tires is necessary to enjoy the full value of all of that stuff.

I realize that may be a lot of mansplaining; if so, mea culpa!
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TC Kline Coilovers; H&R Front Bar; Wavetrac; Al Subframe Bushings; 18X9/9½ ARC-8s; 255/35-18 PS4S (4); Dinan Elite V2 & CAI; MPerf Orange BBK; Schroth Quick Fit Pro; Full PPF
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      08-19-2024, 07:44 PM   #4
SCshaySC
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Thank you for the explanation. I’ll check the fronts and see what type of condition they are in. Hopefully they will be ok. I’ll stick with OEM as I don’t plan to do anything more than spirited daily driving
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