Yeah, it's pretty common. Basically, there's a module/motor assembly that locks the steering coloumn when you take the key fob out of the dash. It's operated by the immobiliser control module. If the locking pin binds, it wears the motor out, which causes intermittent operation.
They're not too bad to replace, the steering coloumn has to come out, sometimes. Can't remember the price, but a lot cheaper than they used to be, as you couldn't buy the locking module seperate from the column!
'07 Transporter 1.9 TDI
'01 Beetle 2.0
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