How disable start/stop to prevent turbo failure?

[RUN-8]

Start stop in our BMW cause a fender bender in ferry lineup, where we stopped after a long drive. Car was off on the dash, yet when stepping out car auto started and hit car in front of us clearly because the engine was dormant and like a booby trap restarted unexpectedly.

Wait a minute, you’re blaming the start stop function in your BMW for YOUR neglect to place the transmission into park before exiting the vehicle?

I’m sure the police and the insurance claims agents involved had a nice chuckle about that claim.

 

[kobyneal]

The hybrids that have been around since 97 aren’t ready for the prime time - and the bmw story is even better. Doesn’t sound like vehicle issues sounds like someone has no idea what they’re doing.

 

[kmershly]

My wife simply refuses to drive the LC as long as it random starts and stops when driving, parking etc, because her BMW comes with a start/stop disable, and she really hates the LC clunky start stop. Myself I always drive with Tow/Haul on to not have to deal with random stops.

With hybrid am not worried for starter motor or battery, because hybrid motor is starting the engine.

Anyone figured out how to eliminate the start/stop function, because the LC does not come with the "@OFF" override button that similar Toyotas like Highlander came with?

Backgrounds

• Start/stop an engine excessively will accelerate wear and reduce the life of the engine, by putting unnecessary strain on all mechanical components
• Fact is Toyota turbos do not seem to have water cooling, kindly refer to Toyota turbo image below for details
• Now you really do not want to stop a hot 1,000 degrees F turbo in "mid air", suddenly stop engine means stop oil cooling for the turbo. Immediate effect is "cooking" and breakdown of lube oil trapped in the glowing hot turbo, and that "water and carbon property" oil sludge resumes circulation through the tiny oil channels of your engine when restarted. Secondary effect is extreme heat stress on the turbo bearings, lack of lubrication

Hope one of you can share a solution that extends the life expectation of the turbo, really not keen on claiming my extended warrantee for something that is so preventable.
Would prefer to keep enjoying this Toyota

I am a BMW enthusiast and own four BMWs (E92 M3, E60 M5, F80 M3 and a G20 M340), I am guessing that your wife has a F chassis because the G chassis (latest generation) no longer have the button to turn start/stop off.

The BMW Start/Stop tech significantly improved by the end of the F chassis and was basically seamless unlike in previous model years where it was rather startling.

In my M340 (G chassis) I don't even know that it is doing it unless I look at the instrument cluster and it indicates that the engine either is stopped or the dme determines Start/Stop should not be engaged and it says so.

My Land Cruiser Start/Stop is just as seamless, it is not maybe as quiet as my M340, but it does not give me any drivability concerns either.

In talking with a close friend of mine who is a powertrain engineer with BMWAG, Start/Stop has come a long way and a lot of the concerns about potential engine damage have been addressed as the technology has improved.

 

[NJ2VT]

My wife has a 2025 X5, start/stop is completely seemless. I can feel the start/stop in the 24 LC but it is so minor and have gotten used to it.

 

[kmershly]

Appreciate all the suggestions and opinions, yet must admit that star stop is beyond maddening to us. Yesterday we were stopped in line for a traffic light, engine stopped, we looked at each other questioning if the car was stopped or dead? The display message came up to shift to park? We did, then all cars around us started driving and honking, still no rpm. Pressed starting button and held till rpm on dash, then switched to drive again, traffic light red again. Switched on tow/haul mode to keep engine alive… that worked and on our way home. Scary and dangerous, and we have owned tons of vehicles from BMW to Mercedes or Dodge, driven everywhere in US, Canada and Europe, yet to us this hybrid stuff is not ready for prime time. Would gladly disable and not end up in a terrible accident. Start stop in our BMW cause a fender bender in ferry lineup, where we stopped after a long drive. Car was off on the dash, yet when stepping out car auto started and hit car in front of us clearly because the engine was dormant and like a booby trap restarted unexpectedly.

It sounds like you have a defective vehicle, Start/Stop immediately resumes when you take your foot off of the brake or if brake hold is on, lightly tap the gas.

Your description sounds like there is an issue with maybe the ECU or TCU. I would get a code scan and see if the vehicle stored any codes and look at the freeze frame data to see what was happening at that moment.

With regards to your BMW, I truly have no idea how your car lurched forward, Start/Stop does not cause the vehicle to move forward, that sounds like a malfunction.

 

[Island Time]

It sounds like you have a defective vehicle, Start/Stop immediately resumes when you take your foot off of the brake or if brake hold is on, lightly tap the gas.

Your description sounds like there is an issue with maybe the ECU or TCU. I would get a code scan and see if the vehicle stored any codes and look at the freeze frame data to see what was happening at that moment.

With regards to your BMW, I truly have no idea how your car lurched forward, Start/Stop does not cause the vehicle to move forward, that sounds like a malfunction.

Great suggestions, thank you. About our BMW, when taking foot of the brake, car just restarted and drove into the parked minivan in front of us in the line. That is why I would pay a small fortune to eradicate any start stop, so we can concentrate on traffic (not imaginary savings because there is none, just look at your mileage, 40 mpg? Didn’t think so).

 

[RUN-8]

Your BMW lurched forward because you left it in gear, with the ignition on, took your foot off the brake, and by your own admission exited the vehicle.

Before you start blaming equipment, seek to improve your skill. Sounds like your abilities operating equipment are pretty low.

 

[Hiker42]

This bit "Yesterday we were stopped in line for a traffic light, engine stopped, we looked at each other questioning if the car was stopped or dead? The display message came up to shift to park?" makes me think the driver tried to turn the car off while it was still in gear.

 

[RUN-8]

This bit "Yesterday we were stopped in line for a traffic light, engine stopped, we looked at each other questioning if the car was stopped or dead? The display message came up to shift to park?" makes me think the driver tried to turn the car off while it was still in gear.

I think we may be dealing with someone who is not qualified to operate a motor vehicle.

 

[TakaraLC]

May not even actually own the vehicle. A lot of the “issues” threads posted on the forums have a bovine scent to be honest. Haters going to hate

This entire post has “start-stop ate my baby” energy.

 

[SingularEntity]

Appreciate all the suggestions and opinions, yet must admit that star stop is beyond maddening to us. Yesterday we were stopped in line for a traffic light, engine stopped, we looked at each other questioning if the car was stopped or dead? The display message came up to shift to park? We did, then all cars around us started driving and honking, still no rpm. Pressed starting button and held till rpm on dash, then switched to drive again, traffic light red again. Switched on tow/haul mode to keep engine alive… that worked and on our way home. Scary and dangerous, and we have owned tons of vehicles from BMW to Mercedes or Dodge, driven everywhere in US, Canada and Europe, yet to us this hybrid stuff is not ready for prime time. Would gladly disable and not end up in a terrible accident. Start stop in our BMW cause a fender bender in ferry lineup, where we stopped after a long drive. Car was off on the dash, yet when stepping out car auto started and hit car in front of us clearly because the engine was dormant and like a booby trap restarted unexpectedly.

I don't have anything nice to add other then....... HAHAHAHAH LOL

Great story

 

[RUN-8]

This entire post has “start-stop ate my baby” energy.

 

[kmershly]

Great suggestions, thank you. About our BMW, when taking foot of the brake, car just restarted and drove into the parked minivan in front of us in the line. That is why I would pay a small fortune to eradicate any start stop, so we can concentrate on traffic (not imaginary savings because there is none, just look at your mileage, 40 mpg? Didn’t think so).

Whether Start/Stop does anything or not, is a completely different conversation.

With that said, from your description it sounds like something else was at fault for the car driving into the minivan in front as that is not how the Start/Stop tech is programmed.

The logic programmed into the car is that after an Start/Stop event, and the brake is released auto-hold momentarily applies the rear breaks (iirc) to prevent exactly what you described.

It sounds like something else went wrong, I wasn't there, so I don't know what.

Auto Start/Stop is not my favorite tech, but at least from how you described it doesn't sound like Auto Start/Stop is the cause.

 

[PDPete]

Yesterday we were stopped in line for a traffic light, engine stopped, we looked at each other questioning if the car was stopped or dead? The display message came up to shift to park?

This (specifically the part about the message to put the vehicle into park) should only happen if you hit the ignition button while the car was running in gear...is there any chance that the button was hit even accidentally?

Even if not, that doesn't sound like an issue with the "start/stop" mechanism, but something else

 

[TakaraLC]

This (specifically the part about the message to put the vehicle into park) should only happen if you hit the ignition button while the car was running in gear...is there any chance that the button was hit even accidentally?

Even if not, that doesn't sound like an issue with the "start/stop" mechanism, but something else

IN my opinion, OP thought car turned off and pressed the ignition button to turn it back on (since his post talks about confusion about whether the engine stopped or dead). This caused the put to park notification to come on. So the events that happened are as follows.

1) OP come to a stop and engine stopped.

2) OP though engine died and pressed ignition button. Causing “put to park” warning to come on.

3) OP put the car to park and pressed ignition again, turning the engine off.

4) After getting honked by people stuck behind him, OP pressed the ignition again and turned the engine on and drove.

So nothing was wrong with the car, OP just didn’t understand how start-stop works.

 

[PDPete]

IN my opinion, OP thought car turned off and pressed the ignition button to turn it back on (since his post talks about confusion about whether the engine stopped or dead). This caused the put to park notification to come on. So the events that happened are as follows.

1) OP come to a stop and engine stopped.

2) OP though engine died and pressed ignition button. Causing “put to park” warning to come on.

3) OP put the car to park and pressed ignition again, turning the engine off.

4) After getting honked by people stuck behind him, OP pressed the ignition again and turned the engine on and drove.

So nothing was wrong with the car, OP just didn’t understand how start-stop works.

This makes perfect sense