Herbie

Good plan!

While the bottom cover is off, check the steel water pipes near the front bumper; they sometimes rust through ...

And the plug which connects to the heater control; the copper cable corrodes if water has got there ....

Hopefully not in your case, but you now know places I've had to go.

Best of luck,

Herbie

I imagine parts up to the end of manufacture will do fine ... I've had no further servo problems since replacing the vacuum pump. A few challenges elsewhere though ......

Herbie

Hello Joe,

My advice would be to get it to a garage soon ... the problem will get worse, and its not the easiest job to tackle yourself. Also the servo is likely to give out when you stamp on the brakes, i.e. when you need it most!  I have now discovered what was eating my servos; the vacuum was fine, so no-one suspected the vacuum pump. But it was leaking Oil past its seal into the servo. It then seems to take about 18 months for the servo seal to perish. So I had to replace both vacuum pump and servo (ouch). Moral of the story? When replacing a servo on a diesel LOOK INSIDE FOR Oil CONTAMINATION. Make sure your garage does. You can source servos second-hand (see earlier post) but I couldn't get a vacuum pump this way .....

Anyway, best of luck, and I hope its just the servo ....

So, I have found posts elsewhere indicating servo failure after replacing brake parts ... corroded brake pipes for instance. In my case the front hoses were replaced for a recent MOT.  Its not much fun driving one of these without brakes, but I'm getting better at it.

Can anyone see a reason for these servos failing after work on other parts of the system?

I have just had ANOTHER servo go on my 2006 diesel s-type. It was fitted 18 months ago and was a new part. Anyone know of a fault that eats servos, or are some of them not really fit for purpose?