Steering & stability issues - need help

[SCGC]

Hi guys !!
I’m currently troubleshooting a persistent steering & siability issues on my BMW F30 LCI 320d EfficientDynamics (2016, B47 engine, manual gearbox).

I’ve gathered a lot of diagnostic data and multiple recalibrations have been performed, but the issue remains.
- The steering works perfectly when stationary (engine on or off)
- Once the car starts moving, the steering becomes inconsistent / sticky – sometimes it feels like it “grabs” or “tightens” briefly, then releases
- The car feels unstable and tense
- There are no warning lights or “steering assistance” errors on the dashboard...
- I had a full wheel alignment done with weights, and after just one day the car feels unstable and tense again.
- Suspension tested – 60% efficiency, no play or imbalance,
- Tie rods ends and stabilizer links have been replaced
- Battery replaced & registered
- Mechanical steering rack check – no binding
- SZL replaced and calibrated
- ABS/DSC, ICM, yaw rate and EPS recalibrated multiple times
- Confirmed latest versions for all control units (checked by two technicians).
- The wheels and tires (R18') were bought brand new about a year ago.
- When the ABS module was physically disconnected for testing, the symptoms became slightly less pronounced, but did not disappear.
- The car was mechanically checked, no problems (checked at 4 diferent service stations, 3 of them are "only for BMWs")

Below is the last BimmerLink Info Memory with all stored error codes (Ista shows no errors)
....No Error Memory & No Permanent Errors.....
I have cleared the errors many times but they appear again.

[SCGC]

Info Memory
Date: 11/7/25 2:17:50 PM

10 Central gateway module
6 errors
101008: Non-resolvable ambiguous routing - SG not in the SVT target table
100600: Flexray protocol startup time is too high
100102: Invalid LocalSleepReadiness message received
100104: HW Weckgrund ZGW
100300: Commissioning could not be carried out because TAS is already busy
100204: Message monitoring: no system context signal

12 Motor electronics
1 error
2AA300: Rear axle ratio, plausibility: transmission ratio implausible to engine control unit configuration

1C Integrated chassis management
4 errors
4827F8: QDM-SKR - Radius correction factor - Learning condition 1
482651: Slip angle estimator - inputs not valid SBS
482656: Slip angle estimator - internal degradation due to SBS
482787: LLP - EXTRAP_FZS incorrect (this appeared afte calibration, before this..was 4827F9: QDM-SKR - correction factor radius - learning condition 2)

61 Combox emergency call
5 errors
E14406: CAN message timeout GPS_PO_EXTS_MOST
2
E14426: Invalid signal in CAN message GPS_PO_EXTS_MOST
E1442C: Invalid signal in CAN message STAT_ZV_KLAPPEN
E14431: Invalid signal in CAN message V_VEH
E14414: CAN message STAT_ZV_KLAPPEN exceeded time

63 Headunit/radio
1 error
8BAC73: NVM_E_REQ_FAILED

67 Controller
1 error
67000D: No error description available

78 Automatic heating and air conditioning
3 errors
078022: Message (vehicle status, 0x3A0) is missing
07802B: COMM_E_NET_START_IND_CHANNEL_0
078043: LINIF_E_RESPONSE

[ptpending]

you've posted to wrong forum section, you need to switch to f30.bimmerpost.com

[SCGC]

Originally Posted by ptpending

you've posted to wrong forum section, you need to switch to f30.bimmerpost.com

...this is f30.bimmerpost.com - https://f30.bimmerpost.com/forums/sh....php?t=2214781

[OC40]

Originally Posted by soundchaser

...this is f30.bimmerpost.com - https://f30.bimmerpost.com/forums/showthread.php?t=2214781

This is the general news section of the universal forum. ptpending is correct. You’ll find more help in the f30 section.

[SCGC]

Originally Posted by OC40

This is the general news section. ptpending is correct. You’ll find more help in the f30 section.

oh.... ok, sorry

[OC40]

Originally Posted by soundchaser

oh.... ok, sorry

All good, mate. We want you to get responses.

[DomMuc]

your problem are the Joints on part nr 5
https://www.leebmann24.com/de/de/com...auteile-322076