For some time now our 03-plate Mk1.5 Ghia estate 1.8TDCi has suffered from a bit of steering vibration. It recently had an MOT and came away with a clean bill of health but needed new front tyres. The front wheels have been re-balanced three times since then but the vibration is still there. It happens from about 65 indicated upwards and is not constant, sometimes it's worse, sometimes barely noticeable. I have noticed that on a gradual bend in the road it comes and goes as though the wheels are going in and out of sync.
At the last balance I specifically asked the the guy to check that the alloys were undamaged and running true and he confirmed they were ok. Also as far as I know the driveshafts are undamaged.
I'm now wondering if the problem is the suspension getting a bit tired and slack - the car's done just over 105K - and therefore less tolerant of any slight imbalance in the wheels and shafts. I just bought a 60-plate Mk2.5 hatch and the handling of that feels so much tighter and more responsive and although I realise the steering geometry is probably different the older car feels distinctly soggy by comparison.
In spite of the clean MOT I wonder if I should have the front shocks replaced. If so what brand should I go for? I notice Euro Car parts list three different makes.
I should be grateful for any help or suggestions.