colabora962

I have recharged the battery and it its reading 12.9 volts and 12.6 volts 4 hours after disconnecting the charger charger and appears to be holding its charge. I will check voltage again this evening and in the morning. It does appear that no one has had any experience with my initial problem of rapid voltage drop on the battery over just one week so if it continues to hold a reasonable charge I guess I will have to live with it. There is a 49AH AGM battery available which I am assured fits the car so I may opt for that when and if I need a replacement as the current one is still only about 6 months old.

I replaced the 12volt battery in the boot at the end of last year via Lexus Chester (car is low mileage 16k now and just out of warranty then) as after a week or two of non running it would not allow the car to start and I knew of the risk of this with a low mileage car from my previous IS300H experience. Its been absolutely fine since late November so I am thinking that something strange has happened to drain the battery or the battery has completely failed. It has been on trickle charge overnight and was registering 11.8 volts this morning. I will leave in on charge and see how far it will charge up and then monitor its voltage drop thereafter. The battery is under warranty if its failed so if it does not hold a full charge I will visit Lexus Chester to talk to them.

H, My car has been left standing for a week after completing an 80 mile trip. I came to unlock it this morning and neither key fob would work so had to open the driver's door with the key blade. No power when trying to start it and the 12volt battery voltage has dropped to 5 volts !!!!!!!!! and now charging. Could anyone offer any help as to why this has happened and what's going on or do I need to contact my local Lexus agent. This has never happened with previous Lexus cars I have owned. Many thanks.

Hi ll, Since my last post on November 10th I have had no water in the boot or condensing on the lower rear window so I am happy with my fix. However, given what I have read above I will be keeping a watchful eye on things over the winter. I may even invest in some Captain Tolley's just in case I need to do another fix in the spring. Many thanks to you all for your feedback.

Hi All, My 2015 IS300h is my first Lexus and I did do a lot of research before buying and I love it even after 2 years plus. Only issues I have had is with the 12 volt AGM battery that was nearing 6 years old.I know that it has lasted well and condensation on the inside of the rear windscreen drivers side, bottom corner, which I have added my comments in the post "water dripping into boot". The hybrid system is guaranteed by Lexus for 5 years, under warranty, which you can extend by having a "Hybrid Health check " carried out annually for another 10 years if you wish at a Lexus Main Agent. The cost is circa £60 when I had it done in May this year and takes about an hour. It

Thanks all for your replies so far. I have contacted "Honest John" and had a prompt reply saying it was a waste of time me writing to Lexus UK and I should find an "Independent Lexus garage" provided me with a link that provided nothing more than local garaged in my area. So, I decided to go ahead and completely seal around the rear windscreen with Granville Silicon Black Sealant.(Clear silicon is also an option) This I did last weekend after I had cleaned the gap between the glass edge and body and ensured all was dry before applying a bead of sealant in the space under the glass edge with a small plastic to smooth it out. It dries fairly quickly and any surplus sealant can be removed from the glass or body as it peels or rubs away. We had light rain overnight Tuesday as so far there is no condensation on the inside lower offside which it where it first appeared. I now need to wait for some heavier rain to see if any condensation appears or I can detect any water dripping from the plastic offside boot hinge cover. If the problem is cured it has cost about £3.50 for a 40 gm tube of Granville Silicon Adhesive , a far cry from the £260 my local Lexus Main agent quoted. I will keep the post updated with any further developments, if anyone is interested.

I have contacted "Honest John" via website and have had a reply which only told me what I knew already apart from saying contacting Lexus UK would be more or less a waste of time but to contact an "independent" Lexus garage. The link they gave me did not reveal any. As the water ingress is via the drivers side seal I am now considering sealing that edge of the windscreen with Granville Black silicon sealant for now and see if things improve and or stop altogether. I am also planning to visit a local windscreen specialist tomorrow , in person, rather than email to see what options they can suggest and will let you all kow the outcome. If I have to seal the whole window for the winter months using the black silicon option, as used on double glazing window outdoor seals then I will do that as it is a cheap fix. Colin.

Hi All, I have the same problem on my 2015 model and the rear drivers corner gets condensation after it has rained. I have wedged a towel into the plastic hinge covering which I change when it gets wet to avoid drips into the boot. I have taken the car to my local Lexus dealer in Chester, Cheshire and spoken to the Service desk people who wish to do a "water test", at a cost , to see where it is coming in but it can only be the rear window seal. I said that the water test was a waste of effort and asked for a quote to have the rear window removed and a new seal fitted which they quoted £0 for the seal and £232 for the job to be done. I then asked how long they would require the car to be told that they would not be doing the work as it would have to go to a *Windscreen specialist" I have contacted three fairly locally to be told by them all that currently they are unable to take on "rear window work" so at the moment I at a stand still in solving the issue. Lexus know about the problem and to me its seal issue which I have never had on any car I have owned in 50 odd years of owning cars. I expected more help from Lexus and feel very disappointed so far. The next step will be to write to someone in Lexus UK direct and or try contacting Honest John for help. Kind Regards Colin.