u/CellistConscious2647

Is aftermarket KYB really the same as OEM?

For reference I have a 2017 Lexus IS300 AWD with 130k miles. I am looking into replacing my front struts and rear shocks.

Obviously I have heard that the OEM manufacturer is KYB, but is it truly identical?

If there are any differences, what are they?

I would also love to hear real world experiences with aftermarket KYB struts and shocks for the 3IS.

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u/CellistConscious2647 — 3 days ago

I have a 2017 Lexus IS300 AWD , and I recently installed Figs 90A front lower control arm bushings. I expected the car to feel firmer, harsher, and more direct compared to the OEM bushings, but this feels different from normal added stiffness.

Over manholes and sharp road imperfections, it feels like the whole chassis shakes or jolts instead of just the corner that hits absorbing the impact like it did before. Even the rear of the car feels like it reacts when the front hits a bump. I am genuinely fearful to drive my car now.

There are no obvious clunks, and the car feels stable at higher speeds, but over regular manholes, even ones that are not badly sunken, the car feels nervous and the impact seems to travel through the whole car. During the install, the bushing bracket was adjusted to help equalize caster or whatever that’s what my mechanic said. He said there was enough play to equalize my caster from it. He also said it was torqued at ride height.

I hate driving my car now and don’t know what to do. I feel so lost and alone especially because I saved my hard earned money for this install and it went totally sour.

What can I do to diagnose this issue?

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u/CellistConscious2647 — 12 days ago

I have a 2017 Lexus IS300 AWD with around 210,000 km, and I recently installed Figs 90A front lower control arm bushings. I expected the car to feel firmer, harsher, and more direct compared to the OEM bushings, but this feels different from normal added stiffness. Over manholes and sharp road imperfections, it feels like the whole chassis shakes or jolts instead of just the corner that hits absorbing the impact like it did before. Even the rear of the car feels like it reacts when the front hits a bump.

There are no obvious clunks, and the car feels stable at higher speeds, but over regular manholes, even ones that are not badly sunken, the car feels nervous and the impact seems to travel through the whole car. During the install, the bushing bracket was adjusted to help equalize caster, so I’m wondering if the bracket could have been shifted or clamped in a way that caused preload, binding, or harsh impact transfer.

Can this happen from the install, or is this just normal with very stiff LCA bushings? I want to keep the Figs bushings if possible, but I want to rule out an install issue because I understand extra harshness is normal, but I don’t think the whole car should shake over every manhole.

Please shed light on this matter for me. Thank you and god bless you all.

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u/CellistConscious2647 — 12 days ago

Need more hours next week? I guess l’ll ask my manager if he can give me more shifts.

“You need help paying the bills with more hours? Sorry”

*next week arrives*

Last minute call

“Hey can you help us cover this shift, for the team?”

Literally the definition of a one way street.

Helping the team is only an obligation for us lol.

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u/CellistConscious2647 — 14 days ago