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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > All-Wheel-Drive (Xi / xDrive) Talk > New XI Coilover option?



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      01-24-2021, 03:39 PM   #1
stelvio
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New XI Coilover option?

https://www.ecstuning.com/b-ecs-part...029310ecs01~a/

Has anyone ordered or received these yet or know anything about:
- warranty?
- rebuildable?
- includes adjustable sway bar links?

On their site they say they're for E90 but not compatible with E91? [I have E91 xi]. I was thinking of buying them anyway but not sure if it's worth replacing my current suspension for this...
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      01-24-2021, 06:08 PM   #2
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Nice find, page says it doesn't fit E92 but I'm not sure that makes any sense. Price is very reasonable
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      01-24-2021, 06:16 PM   #3
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Nice find, page says it doesn't fit E92 but I'm not sure that makes any sense. Price is very reasonable
My guess is that the spring rates are chosen for the E90, maybe they'll have an extra part number for the E92 with its lighter butt, or the E91's heavier butt.

Either way, these look super similar to BCs. Not sure if it's just a representative picture, but a "true coilover" rear is generally not a good thing on cars that don't have it that way from the factory unless there's a cage installed to reinforce the shock mounting points.
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      01-25-2021, 10:22 AM   #4
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Wow really they gunna do us like that! I didn't realize there was a difference between the e90 and e92 suspension. This would be perfect for my brothers car and budget but he has a e92 xi
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      01-25-2021, 10:39 AM   #5
stelvio
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See, I think that because the spring rates are so much higher than OEM, they should really work on any of the E9x chassis. I know Fortune Auto does not distinguish between E90/E91/E92/E93, probably for that very reason.

I am more curious about the warranty that ECS gives and whether they're rebuildable. Not trying to have them 'expire' every 1.5 years.

Last edited by stelvio; 01-25-2021 at 12:01 PM..
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      01-25-2021, 11:40 AM   #6
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Just talked with ECS and it's an error when it says does not fit a e92 awd. I agree they look like BC BR coilovers. I bet they just put in a large order from the same manufacturer

Last edited by Yotaismygame; 01-27-2021 at 03:04 PM..
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      01-26-2021, 03:26 PM   #7
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Just a branded Chinese coilover obviously. Nothing to write home about, but functional and an enticing price.
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      01-26-2021, 03:35 PM   #8
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Will be very interested to hear a review once someone tries these guys out.

I've always been leaning in the direction of KW V1's but these are half price - maybe if they provide at least better than half the quality of the KW's I could be convinced.
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      02-28-2021, 04:37 PM   #9
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Will be very interested to hear a review once someone tries these guys out.

I've always been leaning in the direction of KW V1's but these are half price - maybe if they provide at least better than half the quality of the KW's I could be convinced.
I think you get what you pay for with coilovers.
I have the ST coilovers on my XI. They are the same company as KW. The internals are the same as the V1 just a different shell. Makes them slightly less expensive than the KW but still solid and German man. I have run them year round for over 5 years now.
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      03-01-2021, 08:58 AM   #10
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I think you get what you pay for with coilovers.
I have the ST coilovers on my XI. They are the same company as KW. The internals are the same as the V1 just a different shell. Makes them slightly less expensive than the KW but still solid and German man. I have run them year round for over 5 years now.
Generally, yes, I agree with this sort of thing you get what you pay for.

I've always been hesitant with the STs since we get so much road salt put down here in the Northeast and I drive the car year round. I see you're in Canada where I'm sure you get even more salt than here - the STs have held up well for you?
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      03-01-2021, 09:15 AM   #11
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Originally Posted by Bimmer_Bro View Post
I think you get what you pay for with coilovers.
I have the ST coilovers on my XI. They are the same company as KW. The internals are the same as the V1 just a different shell. Makes them slightly less expensive than the KW but still solid and German man. I have run them year round for over 5 years now.
Generally, yes, I agree with this sort of thing you get what you pay for.

I've always been hesitant with the STs since we get so much road salt put down here in the Northeast and I drive the car year round. I see you're in Canada where I'm sure you get even more salt than here - the STs have held up well for you?
Yup they put a ton of salt down in winter here for sure. I hate it.
The coilovers have held up just fine. I'm sure there is some corrosion just on the outside body of the strut like most suspension. Doesn't effect performance at all. Last time I looked the threads were all completely fine too. Once these coilovers are shot I plan to replace not rebuild them.
I'm not sure the cost difference between ST and the V1s but any extra cost doesn't seem worth it just for an anti corrosion body.
Next round I will either do ST again or spend more for the V3 to have some adjustments...and I hear they ride nicer for daily driving.
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      03-01-2021, 10:24 AM   #12
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Yup they put a ton of salt down in winter here for sure. I hate it.
The coilovers have held up just fine. I'm sure there is some corrosion just on the outside body of the strut like most suspension. Doesn't effect performance at all. Last time I looked the threads were all completely fine too. Once these coilovers are shot I plan to replace not rebuild them.
I'm not sure the cost difference between ST and the V1s but any extra cost doesn't seem worth it just for an anti corrosion body.
Next round I will either do ST again or spend more for the V3 to have some adjustments...and I hear they ride nicer for daily driving.
The salt drives me crazy man. The STs are very tempting - they're probably closer to $900 USD while the KWs would be around $1500. Quite the difference for just a different material in the strut body.

You mentioned daily driving the STs - do you mind quickly sharing your experience and how it felt transitioning from the stock suspension? I know there's a good amount of info out there but always good to hear other opinions.
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      03-01-2021, 02:42 PM   #13
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Quote:
Originally Posted by Bimmer_Bro View Post
Yup they put a ton of salt down in winter here for sure. I hate it.
The coilovers have held up just fine. I'm sure there is some corrosion just on the outside body of the strut like most suspension. Doesn't effect performance at all. Last time I looked the threads were all completely fine too. Once these coilovers are shot I plan to replace not rebuild them.
I'm not sure the cost difference between ST and the V1s but any extra cost doesn't seem worth it just for an anti corrosion body.
Next round I will either do ST again or spend more for the V3 to have some adjustments...and I hear they ride nicer for daily driving.
The salt drives me crazy man. The STs are very tempting - they're probably closer to $900 USD while the KWs would be around $1500. Quite the difference for just a different material in the strut body.

You mentioned daily driving the STs - do you mind quickly sharing your experience and how it felt transitioning from the stock suspension? I know there's a good amount of info out there but always good to hear other opinions.
Exactly! Seems like a lot for just a different strut body. The threads are stainless steel or whatever and I had no problem adjust them after a few years.

The ride is firm and planted which I like. It obviously rides harder than stock due to the ride height. The xi has more weight in the front so they do ride harder compared to on a normal 335i. I find it fine for daily driving. Firmer and harsher than stock but so much more controlled. Zero body roll. Going fast over dips or uneven pavement really shows how planted it is. Plus I love how you can get the stance perfect. Works well with my 19inch staggered set up. 275 in the rear.

2 negatives I would point out is the more people or weight you have in the car, the harder it rides.
Also I find once the temps get to -20 Celsius they are a lot harder and a little bouncy. (This may be the case for most coilovers)

Other than that just the obvious, slow angled over speed bumps and dodging potholes like Crazy. When you bottom them out you will know lol
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      03-01-2021, 02:56 PM   #14
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Quote:
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Exactly! Seems like a lot for just a different strut body. The threads are stainless steel or whatever and I had no problem adjust them after a few years.

The ride is firm and planted which I like. It obviously rides harder than stock due to the ride height. The xi has more weight in the front so they do ride harder compared to on a normal 335i. I find it fine for daily driving. Firmer and harsher than stock but so much more controlled. Zero body roll. Going fast over dips or uneven pavement really shows how planted it is. Plus I love how you can get the stance perfect. Works well with my 19inch staggered set up. 275 in the rear.

2 negatives I would point out is the more people or weight you have in the car, the harder it rides.
Also I find once the temps get to -20 Celsius they are a lot harder and a little bouncy. (This may be the case for most coilovers)

Other than that just the obvious, slow angled over speed bumps and dodging potholes like
Crazy. When you bottom them out you will know lol
Very much appreciate the details and love the way your car looks - super clean setup.

I've been planning for the KW's for a while now and enjoy hearing different people talk about their experiences. I also only run 18s in the summer so should have even less of a comfort sacrifice than what you described, within reason that is.

You've almost convinced me to try the STs and save some money. I'm thinking that with enough attention in the self wash bay after snowstorms it might work out fine. Thanks again!
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      03-01-2021, 03:08 PM   #15
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Very much appreciate the details and love the way your car looks - super clean setup.

I've been planning for the KW's for a while now and enjoy hearing different people talk about their experiences. I also only run 18s in the summer so should have even less of a comfort sacrifice than what you described, within reason that is.

You've almost convinced me to try the STs and save some money. I'm thinking that with enough attention in the self wash bay after snowstorms it might work out fine. Thanks again!
No problem! and thanks for the kind words
You really cant go wrong with either. I always like using German made parts on a German car when going aftermarket. My winter wheels are 18'' and they are a little more comfortable on the seams in the road for sure.
Exactly what I do too, wash the car and the wells to prevent the salt the best i can.
I dont really see rebuilding Coilovers an realistic option. KW/ST wont send you the parts for a rebuild, they have to be sent there. So getting them uninstalled, shipped off, having the car down for a month and then re-installed etc seems annoying. Id rather just drive them till the fail and replace when needed.
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      03-02-2021, 09:26 AM   #16
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I dont really see rebuilding Coilovers an realistic option. KW/ST wont send you the parts for a rebuild, they have to be sent there. So getting them uninstalled, shipped off, having the car down for a month and then re-installed etc seems annoying. Id rather just drive them till the fail and replace when needed.
My idea was to leave the old struts assembled and store them. If/when rebuild time comes, swap new for old in an evening and still have a car while they're sent away. Any reason this wouldn't work?

I'll be doing suspension at some point and really can't decide between STs and Bilstein B14 (new version). Swaying toward B14s for the lifetime warranty. But keep waffling back and forth.

I've also decided the extra $ for KWs is tough to justify.
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      03-02-2021, 10:08 AM   #17
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Originally Posted by Bimmer_Bro View Post
I dont really see rebuilding Coilovers an realistic option. KW/ST wont send you the parts for a rebuild, they have to be sent there. So getting them uninstalled, shipped off, having the car down for a month and then re-installed etc seems annoying. Id rather just drive them till the fail and replace when needed.
My idea was to leave the old struts assembled and store them. If/when rebuild time comes, swap new for old in an evening and still have a car while they're sent away. Any reason this wouldn't work?

I'll be doing suspension at some point and really can't decide between STs and Bilstein B14 (new version). Swaying toward B14s for the lifetime warranty. But keep waffling back and forth.

I've also decided the extra $ for KWs is tough to justify.
Ya I think to go KW you would have to spend more and get the V3 to have the extra adjustments and performance. I also cannot justify that on a 10 year old car that I don't track. Most of us want the coil over for the stance and look. Plenty of options for that.

If you can easily swap them in and our yourself that's great. The only downside is your alignment will be very far out. Anytime the suspension is removed an alignment is needed. Some people say they can eyeball it close but it will still drive a little odd and wear tires incorrectly.
Depends on the cost to ship and rebuild them vs the cost of new as well. shipping from Canada for me would be expensive lol.
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      03-02-2021, 10:54 AM   #18
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*This is my understanding from researching, but no experience. If I'm off hopefully someone will jump in.*

The KWs and Bilsteins have lifetime warranties to original buyer. So essentially lifetime coilovers and the cost of the rebuild is covered. You cover the shipping costs.

ST warranty is 5yrs. So with KWs you're paying for the better material and better warranty. So when your STs need a rebuild outside of 5yrs, you might be better off replacing, then selling the old ones cheap.

KW and ST have to go to California. Pretty sure Bilstein do too, or somewhere US.

Also wondering if self-installation would affect the warranty, or if you'll run into issues if not professionally installed. Couldn't find anything about this in each company's warranty info though.
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      03-03-2021, 01:01 PM   #19
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Got a response back from Bilstein. Said they don't cover rebuilds due to wear; only if due to manufacturing defects (unlike KW/ST - I think). Their rebuilds are done in California, BUT he said you can also potentially have them rebuilt at a local shop (unlike KW/ST - I think).

Maybe this info helps someone else. I'm still undecided.
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      03-08-2021, 05:53 PM   #20
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I got BC for sell if anyone interested
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