Hi everyone!

We recently picked up an ‘02 R53 with 75k miles, and it’s been an absolute blast. It needs a bit of work, but since I’m mechanically inclined, I was excited to take it on as a project. Everything was going great—until recently.

Not long ago, we took it on a four-hour road trip, and out of nowhere, I started feeling a slight jerk to the left through the steering wheel. At first, I thought it was just the road, but it continued even on smooth surfaces. Once we got back home, I did some research and checked for anything loose. I inspected for wheel play (grabbing the wheel and moving it up/down/left/right), used a pry bar to check for any unusual movement in the bushings, and generally looked for anything out of place. I did notice some play in the steering rack, specifically when replicating that same jerking motion.

So, I ordered a new steering rack, dropped the subframe, and replaced it. While the subframe was off, I decided to clean it up since it was covered in grime from a previously leaking valve cover gasket (which has since been replaced). I also replaced both passenger-side engine mounts (one was visibly broken) and the lower torque mount. Additionally, I flushed the power steering fluid. After putting everything back together, I took it for a drive—only to find that the issue was still there, unchanged.

According to the previous owner, the first owner used to autocross on weekends and made a few modifications, including:

• Brembo brakes on all four wheels (massive ones up front)
• A larger rear sway bar
• Stiffer front LCABs
• OZ rims with larger tires (205s)
• An aftermarket intake

As far as I can tell, that’s everything that was done. The issue tends to show up a few minutes into driving and then persists at all speeds. It’s more pronounced during deceleration and always pulls to the left in a series of jerks. It’s rather snappy—without a firm grip on the wheel, it can actually pull you out of your lane.

Here’s what’s been diagnosed/replaced so far:

✅ Replaced steering rack & flushed power steering fluid
✅ New inner tie rods
✅ Power steering pump runs normally, no unusual noises
✅ LCABs were previously replaced (unsure how long ago, but they seem stiff)
✅ All bolts torqued to spec (double-checked since I had the subframe off)
✅ No strange noises while driving or turning hard in either direction
✅ Swapped tires—issue still persists on the left
✅ Replaced engine mounts (except the transmission mount)
✅ Ran the car with the power steering pump unplugged—issue remained
✅ Wheel bearings and CV axles seem fine (spin smoothly, no noise)

At this point, I’m stumped. Could it be sticky brakes? Am I missing something?

I appreciate any insights—thanks in advance!

 

sorry to hear of the trouble. I'll take a guess.

try this, downshift and let the engine brake. same pull? if not, its the brakes.

 

@ssoliman could be onto something, worth a quick test. If not

Ensure your front and rear sway bar links are intact, and good condition. Having even one of these differentiate will cause a pull but its usually a constant pull.
Inner and outer ball joints can cause this, alongside the outer tie rods you haven't replaced yet.
Alignment, again its usually a constant pull but could be worthwhile looking into regardless after all the front end work you've now done.
Other then that, anything loose would cause this. As simple as 1 loose ball joint bolt.

Best of luck sorting it out, post back if you find the culprit!

 

I wouldn't be surprised to find out that a front brake piston was seized.

 

Swap tires front to back - maybe a tire defect that shows up when warmed up. I think you said it does not happen for a few minutes. What size tires / wheels do you have - it could be a wheel problem too.

 

Do you know if the car has an LSD?

 

Thanks for the reply.

The car has 215/45R17 tires—not the standard size, but it's what the previous owner used. I'm not sure if it has an LSD, and there’s no visible sign of the driveline being opened or tampered with. I assume LSD wasn’t a factory feature for this model and would have to be installed.

I did swap the tires left to right, but not front to back—I’ll give that a try. The issue is very specific in its timing. After about five minutes of driving, the jerking starts. I tried downshifting to engine brake, but the issue still occurs. I haven’t had a chance to check the rear suspension yet since I’ve been focused on the front, but I do hear some noise from the rear over bumps—most likely worn bushings.

I’ve also considered the brakes due to the timing of the issue. Since it only starts after a few minutes and then persists, I wonder if the brakes are building just enough heat to start seizing. The car has Brembo GTs (two-piece), and considering the cost of replacement rotors ($500 per side), haha, I’ll likely switch to something more OEM+ and cost-effective for my driving needs.

 

Yea, maybe start with pulling, cleaning, and checking your brake calibers, drain and refill your Brake Fluid.

 

< snip > The car has 215/45R17 tires—not the standard size, but it's what the previous owner used. I'm not sure if it has an LSD, and there’s no visible sign of the driveline being opened or tampered with. I assume LSD wasn’t a factory feature for this model and would have to be installed. < snip >

FWIW in case you're unaware, Limited Slip Differential wasn't offered as a factory option until into the 2005 model year and standard equipment on factory-built 2006 R52/R53 JCW and of course the R53 JCW GP. The majority of 2005/2006 ordered for dealer inventory weren't equipped with that option (2TA) except as noted, unless special ordered to customer specification.

 

F.Y.I. Factory LSD wasn't available until 2005.

 

I also run 215/45/17 ( Michelin PS4 ). No issues.

 

I was able to get some video today. With both, I'm driving on relatively smooth roads (the second vid, it’s even smoother, new road). Speeds were below 40mph. Before this I removed the front calipers and rotors, cleaned and greased everything up along with brake fluid flush/fill. Yes, I'm aware the steering wheel is off center. It's from replacing the rack, I forgot to do the adjustments before driving however, this isn't contributing to the issue. If anything, it's accentuating it a tad.

 

I don’t know if you got further on this. I had a weird issue - post having new control arms installed ( front ). An alignment was done, but the inner ball joint on the right was loose. Loaded, it felt fine - car on a rack above me -. I went to change front pads, and found the problem. It would jump around on any surface change. Check it all. Also, what is rhe condition of the struts.

 

Update - Resolved

Thanks to everyone for the replies and suggestions — turns out the culprit was the left (driver-side) CV axle… go figure.

After replacing all of the suspension components and running through the shrinking list of possible causes, I finally pulled and closely inspected the CV axle. While it wasn’t obvious when installed, once removed, there was a small amount of play in the joints when simulating rotation. Nothing dramatic — but just enough to cause the entire wheel to jerk during motion. My guess is one or both joints were binding slightly, and the effect was magnified by the momentum shift during deceleration. On the bright side, I now have brand-new suspension, brakes, tires, and a fresh alignment… so there’s that! 😅

The next issue (and I’m sure it’s been discussed somewhere on the forum) involves the replacement axle. It’s an aftermarket — much cheaper than OEM (~$500), and while it performs fine, I’ve noticed it tends to back out slightly from the transmission. I’ve measured it against the OEM unit, widened the circlip, ensured it was fully seated — yet it still creeps out over time. The original axle took a prybar to remove, while this one just… slips out a bit too easily. Meh.

 

Huh. Allmag auto in Tampa. I’d go with used OE. I so don’t trust aftermarket these days