20 Most Recent 2007 Lexus RX 350 FWD - Page 5 Questions & Answers

NO.

fuse is bolted in place

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You have to buy an upgraded CD. Like $500

Ok, so you have a high probability of having a bad AIC or Automatic Idler Control solenoid. The issue is the intake control which I believe is a full throttle body has this control screwed into the side with like 2-3 screws and comes out quite easy. Make sure you mark and identify the angle it is in if there is an adjustment. Carbon builds on this both internally and sticks at random. If you are brave and you remove all the plastic and rubber gaskets you can pick up a bottle or can of B-12 spray or cleaner. Be careful as this is very caustic on your hands and you want to wear protective gloves and glasses. This is the one cleaner that I find gets carbon build-up off. Chief Auto and some other stores carry it. Clean it and use a q-tip to get the inside clean and the area where it goes into. use the solution. Spray cans are good. Do not get them on any of the plastic as it can turn them white and potentially ruin them. A little spill on the side of running down the full throttle body is ok, so do not freak out on this point. Put it back in and try it. If it runs better, and not fixed, there is a very high chance that a new one for like $80-110. To be complete, removing the entire full throttle body will ensure a better fix.e

If it turns over hard in the morning then either something is staying on and draining the battery or the battery is nearing the end of its life. Check things like the glovebox light, trunk light for staying on. Simply remove the bulbs and see if that helps. If not , you should pick up a new battery.If it turns over good the problem would be either the cold start system or your fuel system is losing pressure overnight. This would require furthur diagnosis. Hope this helps.

The tire pressure is low then required. Make sure you have checked the tire pressure on all 5 tires. Yes i said 5, including the spare tire. If the spare tire pressure is low then also the light will also come on. ---------- Click this link below to get more details:--- http://technoanswers.blogspot.com/2011/10/tire-pressure-light-on-for-lexus-rx-350.html ----------- This should help.Thanks.Helpmech.

First of all i will say, that this problem is very common with lexus 2007 and 2008 RX-350 fwd vehicles.------- There is a service bulletin forwarded by the lexus for this problem.--------- If your car is under any kind warranty, then this problem will be resolved free by the local lexus dealer of your car.--------- ------------- The service bulletin says as follows :---- Immediately following a cold soak startup, some 2006 - 2007 model year 350 vehicles may exhibit a brief rattle/knock noise from the engine compartment for approximately one second. Refer to the repair procedure below to address customer concerns. --------------- This problem is related too, R & R Bank 1 & Bank 2 Intake Camshaft Gear Assembly.------- The noise is from the gear assembly.---------- ------------- Click this link below and go through the service repair procedure for this problem.------------- http://technoanswers.blogspot.com/2011/08/1-second-cold-start-rattling-noise-on.html ------------- This will help.Thanks.Helpmech.

Both. The best method is to go to a lube shop, with a "t-tech" style trans flush machine and flush the unit, THEN change the filter.
The t-tech machine hooks up to your cooling lines, and they run new fluid in until clean fluid comes out. Much more complete than just a drain and filter...

May be a bad bearing

THERE ARE TWO FUSE BOXES ON THE CAR ONE UNDER THE DASH AND ONE UNDER THE HOOD. SHOULD BE ON THE RIGHT SIDE OF ENGINE COMPARTMENT WITH A COVER HELD ON WITH SCREWS OR LATCHES. ON THE INSIDE OF THE LID ON BOTH BOXES THERE SHOULD BE DIAGRAM OF LOCATIONS FOR THE FUSES

PO354---- Ignitioncoil #4 primary circuit fault

All parts are expensive for the lexus, try www.AutoMD.com for labor and parts for your area

I had the same problem with my 2007 RX350. Had the tires replaced under warranty because of this roaring noise and still had the same problem. Replaced the original equipment brand tires with a set of new michelins and the noise went away. This was 10,000 miles ago.