Known issues thread for the G90?

[polo1]

Anyone know of a known issues thread for the G90 on here?

 

[XXX]

Not sure there is one specific thread dedicated to the issues of the G90. But most subjects are discussed throughout the forum. What would be your issues?

 

[polo1]

Not sure there is one specific thread dedicated to the issues of the G90. But most subjects are discussed throughout the forum. What would be your issues?

Well, I have been reading a lot of this forum, the G90 section, and the only real problems I have found are the shaking at 60-80 mph - which it appears has never really been definitively diagnosed and there is no permanent solution.

Some people have resolved the issue by getting new tires and having them road force balanced - however others have done that and had the problem come back after awhile.

Some also stated they had new rotors put on and that solved their problem.

But there really doesn't seem to be a consensus...?

And then, some people report wind noise/small leaks in the drivers side door seal...?

Other than that - any other problems discussed seem to be one-offs and not really common...?

 

[Gravy]

It'd be cool if the G90 forum had sticky category threads like the G70 and G80 forums. I would think these would be a good set for the G90:

• Engine, Drivetrain, and Exhaust
• Suspension, Brakes, Wheels, Tires
• Detailing and Appearance
• Audio and Navigation
• G90 Reviews and Press

 

[aaron.andelin]

YAHTZEE!
Guys, I have been chasing this problem for years. The other day i got curious about some live data from the yaw sensor. It wasnt stable. It bounced around for no reason. i decided to bring chatgpt into the equation. Here is a summary. and yes. my problem is fixed. Hold your esc button for 5 seconds to disable ESC and traction control. if it smooths out, its your problem too. Good luck!

​

Solved: Genesis G90 Highway Shake — It’s NOT Your Tires​

If your 2017–2019 G90 AWD shakes at highway speed and no one can find the cause, check this before replacing more wheels/tires/rotors.


TL;DR: Mine was caused by a bad yaw/lateral/longitudinal G-sensor module (95910-D2000) under the front console.
It was feeding false data to ESC/HTRAC, which pulsed the brakes and shuffled torque constantly — felt like a rhythmic vibration.

---

Quick Test (2 Minutes)​

1. Drive on smooth road at 55–65 mph.
2. Hold ESC button for ~5 seconds until “ESC OFF” light comes on (full stability control OFF).
3. If the shake instantly disappears, it’s NOT mechanical — it’s electronic brake vectoring reacting to bad yaw data.

---

Live Data Check (ThinkDiag+, Launch, etc.)​

• Module: ABS/ESC → Live Data → Yaw Rate
• Parked on level ground, wheel straight:
  
  • Good: ~0.00 °/s (±0.02)
  • Bad: drifting/jumping −0.25 to −0.8 °/s while stationary or going straight
• Lateral/Longitudinal G should be steady near zero.

---

🛠 Physical Check​

• Sensor is bolted to the floor under the center console, between the front seats.
• One mounting point is a major ground lug (multiple wires) — corrosion/looseness here can cause bad readings.
• In my case, pressing on the connector made yaw stabilize — likely a cracked solder joint or terminal tension issue.

---

The Fix​

• Replace module 95910-D2000 (used OK if good), clean ground contact, torque bolts by hand (6.9–8.8 N·m / 5.1–6.5 lb-ft).
• Run G-Sensor Calibration in ESC after install.
• Shake gone, ESC ON works normally.

---

Why No Code?​

The bad yaw signal stayed “plausible,” so ESC thought the car was in a constant gentle turn — no DTC, just constant corrections.

---

Post this link or copy/paste — it’ll save people months of chasing balance and alignment.

 

[turnne]

Be careful of transfer case failures on AWD models
several in the facebook forum have had the issue..including me
It is a $5000 repair at the dealer..if you dont have warranty coverage

Warren

 

[G-688910]

2020 G90 V8 AWD... no issues whatsoever since new at 34k miles.

 

[turnne]

2020 G90 V8 AWD... no issues whatsoever since new at 34k miles.

Wait until 55-60K...if you keep it that long

do you have an extended warranty? But ..perhaps you meant you bought new...so that would be under the 10 year /100K mile since its drivetrain related



Warren

 

[waz]

If your G90 shakes at highway speeds, and balancing the tires doesn't cure it, have your wheels checked to see if they're in round. If they're out of round, get them trued/repaired. Getting 2 wheels worked on cured my shaking issues for $175 per wheel

 

[NashvilleEquus]

Wait until 55-60K...if you keep it that long

do you have an extended warranty? But ..perhaps you meant you bought new...so that would be under the 10 year /100K mile since its drivetrain related



Warren

Yes, owned since new and only used for road trips (we have 7 other cars).

No extended warranty, and no real worries either. Whatever happens will happen.

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[NashvilleEquus]

Wait until 55-60K...if you keep it that long

do you have an extended warranty? But ..perhaps you meant you bought new...so that would be under the 10 year /100K mile since its drivetrain related



Warren

Yes, owned since new and only used for road trips (we have 7 other cars).

No extended warranty, and no real worries either. Whatever happens will happen.