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I have absolutely have this. Happens after a long hour or two drive. Hard emergency braking makes it pull hard. So much that it would change lanes quickly. You can resolve it by braking very hard a few times. It will come back next time you take a long road trip. Ineos says everything is fine and they couldn't duplicate. They did bleed my brakes since they had replaced a brake line early on. They thought may e there was some residual air. I thought it helped at first but the condition came back again.
Maybe bad caliper with sticky piston(s). It would be good to see/test that caliper.
Dealer checked temps. Ineos said all were good.
Hi, my name is Steve from Los Angeles California and I bought my grenadier on August 31 2025 and after the 800 mile break-in, I was driving normal speed on the freeway and when I brake hard because somebody signed a race on front of me it went to the right about one lane and then I experimented with it and sometimes it would go to the left and right as if the brake fluid was going to different brake calipers left and right And then I would try it again and then it would break left so I took it into the dealer at Rusnak Pasadena and they said they couldn’t find anything, that It drove normal and that if it pull or left or right a little bit that’s considered normal for this vehicle. I told him that I’ve owned Over 60 vehicles in my life and I’ve never had a vehicle like this, but they claimed the technicians test dove it that they couldn’t just climb on the brakes on the freeway so they found wrong.so then I went onto a forum and I found that somebody else took their grenadier to a outside shop and had the alignment checked and it wasn’t correct and also that it could be that they need to put it on the brake calibrator and make sure that’s working properly as well so I want to take it back to the dealer again at Rusnak Pasadena and see if they’ll try it again and put it on the alignment machine and whatever machine they have to check the brakes because it seems like the brake fluid is not going to them evenly. Who knows maybe there’s air in line that needs to be blood out like yours. So now today September 30 I’ve owned it for a month and for the last two weeks I’m dealing with breaking issues every time I go to work and it’s dangerous. I let air out of the tires down to lower tire pressure recommended on the door for three people and a load and I did get a little bit better because it tries a little more sluggish so you don’t notice how it wants to left or right, but when the air is high when I got the vehicle, it’s even worse
My Grenny suffers from the same issue, always has, before and after my King suspension install. It is disconcerting and I wonder how this car would behave in a serious emergency maneuver. For the record, I find Rusnak Grenadier service to be totally useless. I've had 3 issues that I brought the car in only for them to say can't fix it and have to order a slew of parts. I then go home, read the forums and fix it myself in the garage. theineosforum.com FTW!
