2018 Subaru Crosstrek Suspension Problems

Starting at around 75,000 mileage on my 2018 Subaru Crosstrek, a persistent howling noise is heard while driving. This noise comes from the rear of the vehicle and occurs at nearly all driving speeds, measuring at around 90.0dB while on a highway (a dangerous level for prolonged exposure). A service shop and the dealership have both diagnosed the noise as an issue with the rear wheel bearings (consistent with Subaru Service Bulletin 05-70-19R). In January 2026, my low tire pressure warning light appeared on my dashboard. I checked the tire pressure with a gauge and found no issue. I assumed (and later confirmed while getting a tire changed) that the tire pressure sensor had a dead battery, and that the warning light was related to this dead sensor rather than an issue with the tire pressure. Before getting the sensors replaced, I drove for a week with the low tire pressure warning light on my dashboard. I ignored this sensor because I confirmed daily with a pressure gauge that the tire pressure was fine. However, one day while driving in February 2026, I got a flat tire on the front passenger side. I drove with this flat tire for at least six miles, not knowing I had a flat. The howling noise from the rear wheel bearings masked the noise from the flat tire, and I could not audibly distinguish anything out of the ordinary with my car. Unfortunately, this occurred in the same period of time that my tire pressure warning light was giving false flags for low tire pressure. I feel it important to log this issue because - had my rear wheel bearings not been making a howling noise - I would have noticed the flat tire immediately and would not have posed a safety risk to myself or other vehicles.

WATER IS COLLECTING UNDER THE PASSENGER SIDE STRUT TOWER DUST COVER IN THE ENGINE COMPARTMENT AND CAUSING RUST/CORROSION OF THE STRUT SHAFT/NUT AND STRUT TOWER POCKET. VEHICLE NEW AND HAS LESS THAN 4000 MILES ON THE ODOMETER.