Repair Cases
Data over talk. We share the before-and-after numbers and the reasoning from cars we actually worked on, case by case.
One thing first. These numbers belong to that one car. The same model varies unit to unit. So we don't diagnose a cause remotely — you have to see and measure the car.
Cases
BMW F20 differential noise after an oil-leak repair
Bearing damage, overhaul and post-repair checks, with before-and-after alignment readings.
Read the case →
Polestar 4 Pulling Right — We Saw Three
The alignment was called normal. Hands off, it crossed the lane within 50m. The cause was not the front — it was the rear. Caster offset and Road Force overlapped across three cars.
Three more cases are up in Korean — the Bentley Flying Spur (three cars) the Range Rover SDV8 differential, and the Mercedes G63 battery re-test (replaced elsewhere, re-tested at 925 CCA, normal); English versions are on the way. More cases will stack up. For the principle first, read the repeat-pull guide.
Can you check my car this way?
In Suwon we separate tire lateral force, four-wheel alignment, and the chassis in order, then confirm with before-and-after data and a ride-along test drive. NHC Motors, 524 Maesong-gosaek-ro, Gwonseon-gu, Suwon, Korea, by appointment only.
Call +82-31-258-1617 Book on NaverNHC Motors has serviced import and domestic cars in Gwonseon-gu, Suwon for nearly 30 years. Our wheel alignment and total-inspection methods are registered as two Korean patents (No. 10-2552759, No. 10-2646528), with USPTO and PCT applications in progress. We operate Hunter HawkEye 3D alignment and Road Force equipment.