I have a 2006 2.7TDV6 HSE with 20,000 on the clock. I recently noticed that the diesel engine noise was more noticeable when driving, I had a lack of power and fuel consumption had dropped from around 21mpg to an average of 15mpg. I booked it in to LR who advised me that the EGR valves needed replacing and this was my problem. As the car is only 6 months out of warranty and low mileage LR agreed to pay 50% of the costs. I have just got the car back and if I am honest it does seem a little more responsive but still noisy and the MPG is now varying between 15-18mpg so not good at all. Any ideas what might be causing this. The only change to the car in the last few months (November) is tyres. The four original contintental tyres were replaced with Bridgestones. Thanks.

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