RCF5v8

Thanks - I'll do that.

Hi, Has anybody had there steering rack replaced due to notchy steering ? I have a minor issue where the steering feels like its got stuck when driven at motorway speeds in the straight ahead position for a while, it usually shows up after about an hour. It feels like you have to apply more force to the wheel when changing lanes and sometimes after long sweeping bends you have to apply more force and then it over corrects, almost like being stuck in a rut. The steering is fine at all other times. I've googled the issue and there appears to be a bit of info out there regarding other Lexus models, ISF particularly, with this issue and Toyota models in general, but I can't find anything regarding RCF's having it as an issue - mine is a 2015 RCF.

Thanks for the info, I did see it was quite prevalent on the IS but I haven't been able to find much associated with the RC, I can't seem to find any TSB related to the issue on the RC either. Yes I've got the relax warranty, the car has only done 33K miles so not high mileage and full Lexus history. I think I'll get it in to Lexus and let them have a look as it's only just noticeable at the moment but concerning none-the-less.

I must admit I'm tempted to leave it alone as it doesn't bother me that much either, but my only concern is whether it's likely to get worse.

Hi, Has anybody had there steering rack replaced due to notchy steering ? I have a minor issue where the steering feels like its got stuck when driven at motorway speeds in the straight ahead position for a while, it usually shows up after about an hour. It feels like you have to apply more force to the wheel when changing lanes and sometimes after long sweeping bends you have to apply more force and then it over corrects, almost like being stuck in a rut. The steering is fine at all other times. I've googled the issue and there appears to be a bit of info out there regarding other Lexus models with this issue and Toyota models in general, but I can't find anything regarding RC's having it as an issue - mine is a 2015 RCF.

Yes dealers can do it. I think a lot of people don’t seem to bother unless they get faults on the dash coming up. To be fair I would think there is probably only going to be issues if the adjustments to the alignment required were quite large. After I had my alignment done I checked the steering angle sensor and it still read zero in the straight ahead position, similarly the yaw sensor read zero too. That said, I did carry out zero point calibration using techstream which is free to download if you’re reasonably tech savvy; you need a cable too to connect to OBD port to a laptop. If you get one make sure it’s firmware version 2.0.4, the lower firmware versions have limited functionality; most on eBay seem to be the lower firmware. You should be able to set yourself up with all you need for about £70 for dealer level diagnostics software which can read all ECUs on the car and perform error code reading/resets and configurations/calibrations. The process for zero point calibration is straight forward, the hardest thing was finding some level ground with less then 1 degree variation!

Thanks for your help. I presume I can do the calibration using techstream ?

I have a 2015 RCF and am planning to have the wheel alignment done. Does the Steering angle sensor need calibrating after it’s been done or does it self calibrate?