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My other half got caught the same way. She bought an ex-demo Yaris Hybrid, that had a lot of extras (panoramic roof etc, etc) and as I already had a Plug In Prius, I took one look at the Touch system, saw it had a "Nav" button and assumed it had sat nav. Needless to say she was a bit upset when she got the car home and found that the nav button just gave a "system not installed" message. A quick spec check showed that this was an optional extra, as you've found. The add-on "Go" box is more than just the sat nav, though. It enables album art displays when playing music from USB, and allows more comprehensive searching (by title, artist, album etc). As a sat nav it is reasonably OK too, and being integrated into the car does make it easier to use and less unsightly than an add-on sat nav or spart phone on a bracket. Yes, it is expensive, but if you shop around you can get it for less than Toyota charge. I bought a brand new "Go" unit, with current maps and all the cables, GPS antenna etc for £430. It was all of ten minutes work to fit and needed very little in the way of skill (just a plastic tool to help prise the dash panel off plus an 8mm socket and long extension to undo a few screws and re-fasten them). The add-on "Go" box worked straight off, and just needed ten minutes or so to get an initial fix and reset itself from the factory location in Germany (these units are made by Harman in Germany, so default to a German location until they get their first fix post-installation). Once fitted the Yaris has full Touch and Go functionality, including proper album art displays, sat nav and added MP3 music selection functonailty from USB. Yes, it is still expensive, but on balance I think it is probably worth it. My other half definitely thinks it was worth it!

one of my front wheel studs snapped yesterday. I was surprised how easy it was to change. I hammered the old one out and pushed the new one in. surprisingly only £4 from Toyota. you do have to take the caliper and carrier off (2 17mm bolts) disc needs to come off too. this video helped me;

Integrated anythings always seem to be more expensive. We had an integrated (built-in) dishwasher that needed replacing. Not many manufacturers make them but of the ones that did the integrated version was always about £100 more than the same thing with a white case round it. Go figure that! (I ended up buying a 'normal' one from a cheaper make at about half the cost and did a bit of carpentry on the kitchen to make it a 'slot-in'.)

Thanks very much to all members that have responded to my post. Looks like my bumper has been replaced or incorrectly resprayed before I got the car, I did not know, and now face the decision to spend on a respray ? As I intend to keep my IQ for quite a while I will leave it and re consider the bumper respray if if choose to sell in future.

I have just bought a Rav4 and had exactly the same problem. By removing the sensor from the windshield and wiping it (with power on and wipers set to auto), the blades would sweep so i knew the sensor was ok. It turned out that the windshield had been replaced and there should have been a silicone pad between the rain sensor and the windshield but this wasn't there. I have since bought a new silicone pad and the auto wipers now work. Removing the sensor allowed the intermittent wipers to work.

If you are the Alex Webb I think you are, and still at Listers Cov, then you will know that the problem was not solved. my wife got worried about the situations she found herself, so eventually traded the car for a Yaris Hybrid and obviously has not had anything similar since. it will be interesting if Bernard reports success following his fuel pump recalibration. Personally my view remains that it is management control or software issue as the problem corrects following a restart.

Hi, I agree with previous posts suggesting a dying injector. I had the same symptoms with mine. I did not know about the screwdriver test so once the car was running unevenly ( usually when fully warmed up) I removed the electrical supply plugs to the injectors one at a time with the engine running, three of them when removed made the engine run more unevenly ( only 2 injectors delivering fuel) one made no difference so that was the faulty one. Injector cleaner kept the symptoms away initially so if you have a long and important journey to do before you can change the injector that may help. I put a new injector in mine with the help of a workshop manual and socket set in approx 2 to 3 hrs working slowly and carefully (with plenty of tea) as I am no expert mechanic and I had not done a similar job on a car before. I chose to buy a new injector (90 quid if I remember rightly but was about 4 years ago) as their life is suggested to be between 100,000 and 150,000 miles and Carina e and early Avensis with 7AFE being broken typically had that sort of mileage on them. I found some posts on here about injector failure which helped me diagnose mine. Hope that helps. Matt

My problem turned out to be the fuel injector on cylinder number 3, which seems to be a very common problem for this engine! Changed it and everything was fine again. It can be diagnosed by listening to the fuel injectors while the misfiring is going on, for example using a screwdriver that you hold between your ear and the fuel injector. I think you can find more comprehensive answers elsewhere on this forum if you search a bit.

Nice work, well done I did the same thing with mine but also added a delay on the interior light.

yes i agree with gareth paul ,i had the same thing exactly .check with ometer on the injector terminals take off eleky connector put red on one black on the other check resistance from w.manual. do this on all injectors.

could be a faulty/sticking injector. Good tip to find out is grab a long screwdriver with a fat handle, and hold the tip of the screwdriver on the injector body when the engine is idling and place your ear on the handle. Every time the injector fires, you will hear a regular "tick" through the screwdriver handle, much like an old windup clock. Do this when it's misfiring and you can tell if an injector is not "ticking", and therefore not working.