Following a fault on the ACE system I diagnosed it to a suspect valve block pressure transducer. I bit the bullet and bought one £217. I noticed it had a slight seep at the electrical connection and only got 0.3volts at idle. This should be 0.5 at 0 pressure. Suspecting it was suspect took it back, complete with pictures to ask for an exchange and was told I would have to take them the RRS and leave it with them in case it was not faulty and something else. Earliest appointment 3 weeks (I asked out of curiosity). I could not believe they would not exhange a bought faulty sensor without this rigmorole. Obvious I kicked off big style and asked to speak to the parts manager who confirmed the above and refused to exchange the part. I knew their customer service was dire but this is a new low. It's not like I had asked them to fix it just exchange the part I had bought for a working one. Speaking to couple of Indies and like-minded competents apparently this is what they insist upon doing.

Have a chat with Trading Standards to get their take on it. Remind the dealer that under the Consumer Rights Act you have a right to a replacement part, a repair to the part or a refund of the money paid - and that's on the item purchased, not on whether your vehicle may be at fault. Do everything in writing.

And then buy your bits elsewhere in future.

Entirely obvious that they will just find a fault with your vehicle and then try to charge you a king's ransom to fix it (by fitting a new working version of what you've already bought from them) and, of course, then refuse a refund on the faulty part they supplied.

Or they'll do the classic "we've investigated and found that you're right - the part is faulty. Here's a replacement and here's our bill for the investigation. Yes, £500 is a lot for an investigation but we're very thorough". 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Another owner discovers how shockingly bad and/or underhanded they are. Think how many out there that are not on a forum that have been rogered. 2006 2.7 TDV6 HSE in Cairns Blue.

RRSTDV8 wrote:

...you have a right to a replacement part, a repair to the part or a refund of the money paid - and that's on the item purchased...

Or they'll do the classic "we've investigated and found that you're right - the part is faulty. Here's a replacement and here's our bill for the investigation. Yes, £500 is a lot for an investigation but we're very thorough".

Nothing to do with warranties - it's a simple matter of the customer buying a part that is faulty. The customer's contract is with the dealer as the person selling the faulty part. The Consumer Rights Act doesn't care that the dealer has to persuade JLR to refund them - that's the risk inherent in being in business.

The relationship between the dealer and JLR is of no concern to the customer or to the law.

Anyway, if the part is found not to be faulty, they just put it on the shelf and sell it / use it next time. 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

If I'm reading this right, the OP bought a part from a main dealer. He then fitted the part and suspects 2 faults; a weep on an electrical connector (suggesting a failure of an internal seal?) and low voltage from the unit. Does it actually operate correctly/throw any faults? Obviously the fluid leak is a separate issue and reason for rejection on it's own.
He then removed the part, and pointed out that it was defective to the vendor who wanted to have the car into the workshop.
Surely the vendor can test the part off the car? if they say it's functioning correctly can they account for the fluid leak?
Why do they need the car?
If they are suggesting that the OP has caused the faults or damaged it on fitting, surely that's a different issue.

I can confirm that the part was fitted carefully and correctly. I have been undertaking vehicle repairs for over 40 years and have never had an issue exchanging faulty parts at anywhere else. Why should I have to reassemble the vehicle, make an appointment then deliver the vehicle to them for an unspecified period for an issue I have correctly identified and can repair correctly. Totally unacceptable practice. We all know how frustrating these vehicles are but their practice does add to the frustrations as they fail to recognise that some of use actually know what we are doing.

I think I will probably sell one sorted. Shame really as I do like the car but the inherent issues take the enjoyment out of owning one.

It doesn't sound reasonable to me either.
The advice above re Trading Standards seems a good shout, or maybe Citizens Advice?

If paid for by Credit Card and over £100 then just contact the credit card company. MY17 RRS 4.4d V8 Autobiography - Aintree Green (also referred to on Topix as British Racing Green)

Topcat2308 wrote:

I can confirm that the part was fitted carefully and correctly. I have been undertaking vehicle repairs for over 40 years and have never had an issue exchanging faulty parts at anywhere else. Why should I have to reassemble the vehicle, make an appointment then deliver the vehicle to them for an unspecified period for an issue I have correctly identified and can repair correctly. Totally unacceptable practice. We all know how frustrating these vehicles are but their practice does add to the frustrations as they fail to recognise that some of use actually know what we are doing.

I think I will probably sell one sorted. Shame really as I do like the car but the inherent issues take the enjoyment out of owning one.

Well I decided to beat them at their own game. Got a mate to add one to his parts list on my behalf. Carefully opened and switched it with the one I had. Resealed and returned it for a refund. Success. The only down side is I hope they use it in their workshop and don't sell it to anyone else.

Well done, hope your problems are completely solved now.