Picked up my car. Lexus had sent a brand new engine for my car. However they authorised the dealer to clean the EGR valve and the CAT. Dale had informed me when I had dropped the car, that previously they were rebuilding engines and replacing EGR and CAT, and that now Lexus were taking back the faulty engines rebuilding themselves and sending out for warranty replacement, they were only doing this if the head, pistons, cranks etc were ok, but most of the time they are not so most people get brand new engines.
I must admit after collecting the car, it feels a lot tighter and drives like a brand new car. I filled up the car with Shell regular diesel and took it for 130 mile run, on the motorway I averaged 45mpg, locally I've done 10 miles and got 35mpg. When I filled up I noticed that my fuel range was now showing 495miles, this was just after collecting the car and prior to my drive. Prior to the new engine whenever I had filled up range on tank would only show 402miles.
One more thing the dealer had noticed that my rear brake calipers were seizing on an intermittent basis, I had them replaced at the same time as the engine, maybe they were sticking whilst I was driving hence having an effect on the fuel economy, as more friction there to slow me down whilst engine working to speed me.
I asked the dealer if they lubricate the calipers on service, they stated they do it now. So maybe when winter approaches every year I will go Kwik Fit and have the free brake test they offer and when car goes in remind the dealer to lube the brake calipers. That way i have two opinions plus one from the MOT test, just to monitor this as I note the rear brake calipers are another common fault.
Right now the way the car drives it reminds me of the way my company car use to drive when I first got it brand new. This second Lexus has put a big smile on my face, and having driven my wife's 120d M Sport earlier today think this engine in the Lexus is just as good if not better. Just needs a bit of TLC.
If you have any warning lights on take it to your Lexus dealer and let them decide on course of action - it may get your problem sorted than trying second guess an alternative or a cheaper fix, if that doesn't satisfy you contact Lexus Customer Relations to ensure dealer is following their brand protocol in your particular instance.