TPMS ??
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From: Ottawa, Ontario, Canada
2010 C63 AMG, 2009 ISF , 2002 L-Tuned IS300, 2011 ML350
TPMS ??
Hi everyone, I searched the forum & everyone seems to be having to buy a new set of TPMS for their aftermarket wheels. But why in the world my dealership is telling me I don't have TPMS in my wheels, it's in my speed sensors?
BTW, my car is Canadian spec... is it different from US spec? Thanks for your help!
BTW, my car is Canadian spec... is it different from US spec? Thanks for your help!
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S65
Your... speed sensors?
Silly Canadian dealers...
Modern cars get their speed readings from one of two places. Transmission or ABS sensors. Neither, by themselves being a "speed sensor".
I don't see the TPMS being part of either.
Silly Canadian dealers...
Modern cars get their speed readings from one of two places. Transmission or ABS sensors. Neither, by themselves being a "speed sensor".
I don't see the TPMS being part of either.
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From: Ottawa, Ontario, Canada
2010 C63 AMG, 2009 ISF , 2002 L-Tuned IS300, 2011 ML350
Yeah, I'm confused... they told me that my valve stems is rubber, so I don't have a TPMS installed... it would have to be steel valve. He shown me some cars in the showroom with the steel valve. Maybe, I will have to take my stock rims apart to check.
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From: Toronto
MY17 E43 Matte Selenite/Macchiato Beige, MY16 GLE350d Tenorite/Crystal Grey, MY17 B250
US cars require wheel-mounted sensors. Canadian cars do not (for most models).
The Canadian cars use the wheel speed sensors (yes, that is what they are referred to as) to determine if a tire is low on air.
The Canadian cars use the wheel speed sensors (yes, that is what they are referred to as) to determine if a tire is low on air.
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From: Ottawa, Ontario, Canada
2010 C63 AMG, 2009 ISF , 2002 L-Tuned IS300, 2011 ML350
^^ This is the answer I was looking for... thanks YYZ! So does it means I don't have to buy new TPMS for my new wheels? Is it just a matter of removing my stockies & installing my new wheels... anything to reset on the computer dash afterwards?
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From: Sydney & the NSW Central Coast, Australia
C63 AMG, BMW 135i
Australian spec cars also have speed sensors inside the fender, no TPMS needed. Change the rims and tyres as much as you like, just reset the sensors via the display menu using your steering wheel controls buttons.
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Your onboard computer may ask you to reset the tire pressures or simply reset the TPMS speed sensors.
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From: Socal
07E63, 12E350, 08997TT, 16SiennaSE
On the E63 the Canadian TPMS is more advance than the US, they show all four corner and what the actual pressure is in each tires. The US model get a message on the dash if your tires pressure drop than you have to go find which one is actually low.
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That the cheapest way to monitor your tire pressure. Pressure in the tires drop, ABS senses changes in rotations rpm than light up a bulb on your instrument cluster. Very simply and cheap since after 2007 all US car are required by law to be equip with TPS.
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I have the wheel speed via ABS sensor system on another car...it is vastly inferior technology that is very cheap to implement and in my experience, totally useless. The one time it actually alerted me prior to a flat I already could feel something was wrong a mile prior and was headed to a gas station anyway. The alert went off when I had pulled in next to the air pump. I had set the system for 36lbs, the alert sounded at 11lbs.
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S65
I understand it's cheaper than actual TPMS sensors. After all, copies of software are cheaper than copies of hardware. 
Still, it takes CPU cycles to count rotational speeds and calculate pressures.
I'm curious now, just how accurate is the "ABS" way of measuring tire pressures? ±1PSI? 2? 5?
Still, it takes CPU cycles to count rotational speeds and calculate pressures.
I'm curious now, just how accurate is the "ABS" way of measuring tire pressures? ±1PSI? 2? 5?
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From: Sydney & the NSW Central Coast, Australia
C63 AMG, BMW 135i
Just as a side note, my BMW with ‘run flats’ doesn’t use TPMS, it uses the speed sensor system similar to our Australian spec C63. The only difference is, you are required to input the pressure values for each tyre when resetting the system. Our laws here don’t require any tyre pressure monitoring at all.
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Thread Starter
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From: Ottawa, Ontario, Canada
2010 C63 AMG, 2009 ISF , 2002 L-Tuned IS300, 2011 ML350
It's funny how Mercedes built cars differently for each countries... i mean the TPMS system should be the same on every car in my opinion.
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From: Ottawa, Ontario, Canada
2010 C63 AMG, 2009 ISF , 2002 L-Tuned IS300, 2011 ML350
This is good for US spec cars... my (Canada) stock wheels doesn't have TPMS sensors. And even if they did, I would prefer to buy an extra set in case I would need the stockies as spare wheels.
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2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
Not needing the TPMS sensors can save a lot of mounting problems, maybe open up wheel options and help reduce balancing issues. I would rather not have the sensors or the complications that come with them.
I have been able to monitor my tire pressure myself for 45 years and think I can handle it for the foreseeable future.
So, I for one, am just as happy without them.
I have been able to monitor my tire pressure myself for 45 years and think I can handle it for the foreseeable future.
So, I for one, am just as happy without them.
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2012 C63;1971 280SE 3.5(Sold);2023 EQS 450 SUV 4 Matic (Wife's)
