Tesla Model 3 - V4.0

As I said I don’t normally take pay close attention to the projected versus actual % remaining figure as I normally plan to have plenty ‘in the tank’ on arrival so I can deal with any unplanned trips. So a 5% or so deviation wouldn’t really register with me.

However a 13% deviation is quite substantial and it’s interesting that you also experienced a similar issue on trip from west to east. Will keep a closer eye on this for future longer trips

Think you have a bug creed. I've never found the nav software to be more than a single percent out either way - assuming I stick to the limits that power the nav software.

I've also run mine down to -3% and the earth didn't cave in.

Seems like an issue in the latest Highland software update?

Haven't, but might start.

I currently have full faith in the nav system to report correct consumption….until I get an anomaly like you're seeing. It's been good so far, but….

I would use energy meter at least a couple of times a week for long journeys over the last 4.5 years and have found it to be very accurate - but this comes with a big caveat. There is an amount of variability when traveling at higher speeds (>100kmh).

My assumption is that its related to the forces associated aerodynamic drag, which increases exponentially with speed. i.e. as you double your speed, the air resistance quadruples.

If you plotted a graph of the M3's energy consumption vs speed, it probably look like a curve that is relatively flat at low speeds, gradually increases in the middle range and then rises very steeply at motorway speeds. i.e. After 100kmh, the curve on the graph starts to steepen dramatically.

Driving on a long journey is generally not static, especially on a motorway. There is a lot of variability and at high speed caused by traffic and weather, which in turn (again my guess) is that this consumes quite a bit of energy when there may not be a lot to spare. Overtaking even at constant speed, consumes additional energy (again at high speed) as car needs to counter the airflow which is disrupted by traffic. I assume there is also a level of conservatism built into it.

Over the years, Ive probably had about dozen experiences of arriving at <1%. Many of these times simply required me to slow down to make it. A couple of occasions I actually exited to motorway for safety as I was going less than 80kmh. The meter may reduce your range as the journey increases causing concern, but equally it can work in reverse if you modify your driving.

Having a 53kwh nominal battery, my range is lower than newer owners. But I have always made it to the next available charger or destination, thanks to the energy meter.

YMMV quite literally!

Cheers. As I said I havent been closely monitoring this issue up to know but do remember seeing the projected arrival % flip flop between -3% and 12% on a 300km (mostly motorway at 110kph) trip back in June. During the journey a message popped up a couple of times saying ‘stay below 111kph to reach destination above 7%’ (my memory’s not that good…I just found a picture I snapped at the time as I was surprised by the variability in the projections). I’ll keep a closer eye on this from now on to see if its the norm or an anomaly.

Are the projections based on staying at 100kph or less on motorway? That’s not really realistic for a lot of people. For the risk averse it might be worthwhile and less stressful to consider adding 10% to projected % on arrival so you can drive at more normal motorway speeds.

I’ve nail in my tyre so need to get it patched. Is this something you do through the Tesla app or just get onto one of the tyre centre's?

Log a service ticket guys, this is not normal behaviour.

Hard to know. It does update as you drive so its not a bug, it's updating based on driving conditions , road conditions and local weather.

yeah, takes about 5 minutes with a plug kit obtained from Amazon, likewise the 12v compressor.

if its on a front wheel turn & rotate wheel so its easily assessable without having to remove the wheel, on the rear, you might need to lie on the ground to do it, but it can be done.

that screw is plugable, but a few mm closer to the sidewall and it'd be a new tyre needed

I find if I have the puncture facing aft, at about 4 o'clock - 5 o'clock (for a rear left), it's doable, but as I said, you just have to be prepared to lie almost flat on the ground to get at it.