pgg450h

My dealer has advised this is most likely to be the brake accumulator and is normal for it to be running all the time. Strange that I've never noticed it running continuously in the past but explains why you've not had any problems with yours @Upex.

Thanks for the reply, I've had my car for well over a decade now (still love it), got to know all the noises pretty well and though this wasn't an unusual noise, the constant running when in electric mode was new. At least I might not have to rush to get it checked, I'd still like to know why it's changed but might wait now till the next service later this year. Glad to hear you're still running and enjoying yours!

Hi, not sure if you still have your GS or can recall but I think I have the same issue, in fact it's only recently occurred after just having my brake discs all round and 2 calipers changed. Did you ever get to the bottom of it and find a solution? Thanks in advance, Pravin

Yes I'm happy I stayed with OEM, glad you got it sorted in the end.

By the time you add the fitting and tips to the Lexus Bristol price that's over double what your going to be paying, well worth the shop around that one.

Agreed, we are 'fortunate', that is a particularly unwelcome bill for an exhaust.

Personally, I just wanted to keep the car as quiet as possible, this replacement should see me out with the car so not too concerned by the warranty side. Appreciate the suggestion and I have done s/s on an old Honda CRX Vtec I used to have (loved that car) but it did make it a little noisier despite best efforts..

That's the best price I've seen for a genuine back box so well done there, possibly Lexus Bristol were pricing for new tips too?

I had the back box section replaced. Starts off as a single pipe which connects to main exhaust then splits in a Y piece to feed each of the new silencers, it's all one assembly. The original tips were re-used and the £650 I paid was fully fitted inc. vat.

Thanks for the objective point of view, I was beginning to feel I was expecting too much from it. 10 years is a good life for a quality system and though the bulk of the mileage the car has done is c80+ miles of commute when it is in use the corrosion does appear to have eaten away from the inside so there must have been enough short trips to take their toll. Thanks again for all your helpful advice and information.

Do you think I'm being unreasonable in expecting better from a Lexus?

My exhaust had infact snapped away at a different point than expected, it was right at the entry to the rear silencer on the driver's side. There is actually a metal cradle of sorts which sits right beneath this point on both silencers, I'm not sure what they are for but you can see that is what hit the road and has been ground down. If it wasn't for that barrier the results may have been more impactful with the potential for the silencer unit to be catapulted upwards and outwards if the edge itself had caught the road at the wrong angle. Total bill was £650 all inc which is near enough what you had paid. The warranty claim was rejected but I am going to pursue with Lexus Customer relations as the warranty is administered by TWG on behalf of Toyota/Lexus. I have grown to like the car considerably over the years and bought into the brand values to the extent that I was only really considering another Lexus as a replacement but dependant upon how Lexus view this I may reconsider. Yes it's a 10 year old car and corrosion is to be expected, indeed if both sides had corroded to similar extents then I would not have bothered mentioning it. But the other side is in much better condition as has useful life still to give so the question would be what is 'normal corrosion / wear & tear' and what is considered abnormal/unusual/accelerated deterioration? I have never had a car do this before, I would have expected more warning signs e.g. a blowing exhaust to indicate is was that badly corroded - even my MOT garage who I trust fully hadn't raised the corrosion they could see as anything of concern.

Quoted £650 for replacement, claim submitted to Lexus warranty but dealer (who I have been very happy with) believes it will go nowhere..

Thanks Messi, will bear that in mind if it comes to considering s/s further as I live in Warwickshire so Walsall is not too far away. Plan 'a' though is to pursue a warranty fix.

The car is going in on Wednesday for an assessment, I'll be interested to see what options are presented. The reason I have maintained the warranty and full Lexus history is to help avoid any unwelcome surprises, I do find it uncharacteristic that it has failed in this manner. Will post back with an update, thanks again for your suggestions and advice, it is much appreciated.

Thanks, sounds like that's exactly what has happened as the location is the same for the break. The car is under Lexus warranty but I'm not sure how likely they will entertain a contribution but very annoyed at how suddenly it has failed. Exploring the S/S route but appreciate your comments on their variable quality/cost and my concern is also if it could affect the remaining warranty I have. Wasn't aware there might be Indy's who could supply and fit, thought it might have to be a dealer part? Who did you use if you don't mind me asking and what did it cost?

Evening all, I have been aware of some corrosion on the outer skin of one side of the rear back box section however this evening the exhaust broke, making contact with the road until I brought the car to a stop. Needless to say it is beyond repair but has anyone else experienced failure of this type and infact has anyone had to replace their rear exhaust section yet due to age/corrosion? It's a little odd as the other side is holding up far better and is what I would have expected the condition to be given a previous 5 series I had was still on it's original exhaust at 13 years and 130k miles? I'm on 10 years and just over 100k with my GS currently.

Great effort, thanks for sharing. Keen to keep my GS for some time yet but was concerned about this looming issue, a lot more confident about it now.

Hello all, The offside rear silencer box on my GS450h has developed a small hole due to corrosion (I thought these were stainless steel?) Advised it is just the outer skin and nothing to worry about yet however am keen to prepare for what might be a big bill. Car is 2006 with 77k miles and under warranty. Has anybody else experienced similar, if so how much longer might it still be serviceable for? Also it is worth try to repair with those bandage type products and finally has anyone had to replace, if so at what cost? Thanks in advance for any advice.

Mine were replaced under warranty with no issues, is it the Lexus warranty you have or the dealer's own variant?

Great stuff thanks!

Have ordered some red rubber grease, will make sure it gets around those seals thanks.

Do Mk3's have stainless exhausts from factory? Think I heard that from a dealer a little while ago..

Not always too noticeable esp if its the rears but for me, there was a squeaking from the brakes when the car has been stationary for a while and now that they have been replaced, the car free wheels better and I find the ride a little less crashy too. However it was only the dealer advising that they were seized and the pads were worn on the insides that prompted any action.