Went under the car to sort out the noisy 2ndary air pump a while back (as per the helpful guides on Briskoda) and discovered there is no undertray.

Found this on ebay - is this what I need?:

http://www.ebay.co.uk/itm/111283151291

Or, do I really "need" to replace it? I presume it keeps all sorts of spray and muck getting up into the engine bay?

No need for it really. I've been running my A4 without one for the last 6 years & 70k.

There are 2 kind of undertrays, a short and a long one. The short does not provide to much of protection, but the longer one helps a lot. From what I can recall the long one was used in diesel models. Unfortunately I can't remember s.n. for the long one.

Long one is for the diesel. I have a centre section for the vrs, pm me if interested. They're essentially a splash guard and do improve mpg a little as they help airflow under the car.

I'd always rather have them fitted for what it's worth.

Cheers, Pm sent

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