The saga continues... UPDATED

johnbristol1966

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Mar 30, 2025
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Location
UK
Driving
MG3 Hybrid+
I've mentioned in other threads and posts that I have had a few issues with my car since I bought it from a dealer last October. First, the Sat Nav has an issue where it often switches on, if I'm stationary, to show a previous location on the map. It will not update until I start to drive. The MG dealer has been good and had the car in several times (6, for that issue alone, all single days) but have not managed to cure the problem. On the last occasion they changed the centre screen head unit, as advised by MG. Not only did this not fix the issue, but it messed up my 360 cameras and everything was distorted. This especially affected the overhead view and I could see my own number plates enlarged in front and behind the car, and everything was twisted. If I used the front and rear cameras "straight ahead" on the camera was actually about 30 degrees to the right when I looked out of the window! After I advised them about this, they said they would get my old unit back and I assumed they would refit that, as well as investigate the Sat Nav more. They asked for a 5 day booking with the car. This happened last week. I also advised them I experienced the well known hill climb issue a few weeks ago, as mentioned elsewhere on this forum, and also the knocking from the rear that so many people get. They said they would deal with all this. I even sent them a link to the relevant videos on here about fixes for the hill climb issue.

I collected the car yesterday and was told they were still unable to complete all issues as the car had been in and out of the garage, testing stuff and feeding back to MG. There were still things to try with the Sat Nav, and they had been unable to complete the fix they say MG has issued a bulletin on, regarding the knocking in the rear. Would I let them know what the Sat Nav was like, and if the camera was fixed? They had done updates regarding the uphill and hybrid software. On driving the car away, one thing I noticed instantly was the mileage was the same as when I dropped it off. How were they supposed to test the Sat Nav when thy didn't drive it away from the garage to see if it showed the new location on starting up the navigation? The head unit hadn't been changed, it still showed my Sat Nav favourite for my holiday a few weeks earlier and therefore the cameras were still the same. However, one so far good point. The car seems to rev higher when going up hills now, i witnessed 3200 rpm whereas I rarely went over 2400rpm previously, but I do seem to spend longer on EV mode. Last night we went for a drive, and on the way back I did 10 miles on open road, and the mpg was recording 99.9!! The last 3 miles were through town, and on arriving at home, it was still showing 85.6! That's a LOT higher than I have ever had before. The miles left in the fuel tank, 161, didn't change over the whole journey. (actually it went up to 162 at one point).

So they want the car back in again so I'll keep you updated if the hill climb issue has gone, if mpg stays high, and if they fix the knocking and the navigation.

I still love the car though!
 
Would be very useful if you could get some details regarding the supposed fix for the "hill climb issue"- I guess there must be some sort of reference number for the software update. This so I can get the dealership to check if my car needs the update.
 
I'll see what I can get when I speak to them next. In another thread on this forum someone posted a video that talked about a fix, and I emailed the garage the link to this video before I went. It seems they have done something, but out today I've noticed the car revs a lot more on hills, even small ones, than it ever did before. Over revving is something else that gets moaned about a lot, so maybe I've now gained that!
 
Further update... The car is going back in for a couple of days soon, but the new update they did to the hybrid management system has shown they have made my system "better" by adding a lot of the issues I read other people having. Had a drive to the coast and back today, 160 miles in total, and the car now screams at up to 4700rpm up any hill, at any speed, and with up to 70% battery. I also experienced the loss of regen downhill when it revved to 3000rpm downhill and then gave me a reduced regen just as I approached the start of a 30mph at the bottom of the hill, battery at 100%. It caught me out and I was speeding as I hit the start of the 30! Overall mpg doesn't seem to have changed at all. I want my old software back!
 
UPDATE. The car was in the garage again last week. The camera issue was fixed by putting my old head unit back on. This could be done as it was changed due to the sat nav issue but didn't cure that. It turns out a new head unit needs your garage to purchase a calibration mat that sets the 360 camera up.

The garage completed the bulletin issued by MG about the rear knocking heard by many of the forum users. The rear bumper was taken off, and something altered to the various bits at the rear end. The knocking has now stopped. Just sounds like a normal suspension now. Great relief. Get your garage to get the bulletin that has been issued to fix this problem.

Regarding uphill over revving, MG have said this is a known fault, and an update will follow.

Sat Nav issue, they changed a telematics box, hidden deep in the car as readings showed this needed changing, but it didn't change a thing to help my sat nav issue! However I have noticed the location fault is sent to the i-smart app too. When it shows wrong on start up in the car, it shows wrong on the app to. Perhaps that may help them sort it.
 
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