I hate intermittent faults!
Around 40-45 mph, I have experienced a worrying small oscillation in the steering wheel at a frequency of around 5Hz. It has happened maybe around ten times during my ownership.
It seems to disappear when the speed increases slightly. Despite my best efforts, I have not been able to induce it. It lasts for around 5-10 seconds. Hard acceleration, hard braking, violent weaving - no result.
The first occasion, I assumed the wheels were about to fall off. They were not.
I thought maybe the assistance was electric but, a glance under the bonnet, proves it is hydraulic (and, yes, the reservoir level is correct). It is not clear whether the steering actually judders or whether it is just the wheel.
I am no whizz on modern cars (although have '79 MGB V8, and a couple of BMC 1.5 marine diesels under rebuild) and have no clue what the cause could be.
Anyone with a similar experience please?