Gen II Brake Life - 83K+?

2009Prius · 07-22-2009, 12:06 PM

Quote:

Originally Posted by archae86

... I am disappointed that Toyota does not include any kind of display to clarify when you have exceeded regeneration limit and are actually using the friction brakes. However if you watch the battery current display on a scan gauge while gently varying the brake force, you can find the limit.

At 25 mph it is really, really easy to stay in pure regeneration. By contrast, at 75 mph the regeneration limit represents a very modest deceleration rate.

...

How exactly do you tell when the car is "in pure regeneration" with the scan gauge?

Bob64 · 07-22-2009, 01:47 PM

You cant.

BUT chances are, if your below 80amps going into the battery, chances are your using regenerative braking. If you see over 80-100 amps, you'll feel the friction brakes kick in.

60amps is the sweet spot for regeneration.

SageBrush · 07-22-2009, 02:04 PM

Wayne Brown:
http://privatenrg.com/#100kBrakePads

If I'm bored I'll check the pad thickness at 150k miles.

bruceha_2000 · 07-22-2009, 02:53 PM

Like they said

Even in 'regular' vehicles, the number of miles on the odometer isn't necessarily indicative of brake life. Mostly Interstate will last a LOT longer than mostly city.

Unless the prior owner continued to drive like they did in their old car, you have a LOT of pad left. You can certainly measure them just so you know where YOU are starting.

I think my pads will last more miles than my wife's.
1) She waits longer before she brakes for stop signs, I suspect she hits the pads well above 8 MPH while I rarely do
2) 85% of her driving is city and I have probably 40% Interstate miles. Still have 70%+ at 93K miles

Even so, she shouldn't have a problem getting to 100K on them

krousdb · 07-22-2009, 03:27 PM

176,000, brakes are still original.

**Tideland Prius** · 07-22-2009, 03:29 PM

Quote:

Originally Posted by archae86

Yes, but the definition of "brake lightly" varies rather drastically with speed in terms of how it feels. I am disappointed that Toyota does not include any kind of display to clarify when you have exceeded regeneration limit and are actually using the friction brakes. However if you watch the battery current display on a scan gauge while gently varying the brake force, you can find the limit.

At 25 mph it is really, really easy to stay in pure regeneration. By contrast, at 75 mph the regeneration limit represents a very modest deceleration rate.

I would love to hear the truth from actual Toyota technicians who see a lot of brake pads, but I suspect that the rate of wear varies quite drastically from owner to owner, being driven both by driving conditions and owner habits. (even more so than with conventional systems)

Yes and for seasoned owners like ourselves, we know where the limit is (roughly). For someone new like the OP, I think light braking works well til they learn more about the car.

lys · 07-22-2009, 06:08 PM

Fortunatly I can apply the pads under 8 MPH.
In opposite case I'm afraid they could get unchanged the whole life of the car, (and rust in the middle of the life)

(Really rare city use)

**Tideland Prius** · 07-23-2009, 01:09 AM

Quote:

Originally Posted by lys

Fortunatly I can apply the pads under 8 MPH.
In opposite case I'm afraid they could get unchanged the whole life of the car, (and rust in the middle of the life)

(Really rare city use)

just shift into N and brake. That'll use the brake pads and clean up the brake discs a bit.

CBarr31 · 07-23-2009, 08:22 AM

160,000 Miles ... still original brake pads.

Happy Driving,
Chris

2009Prius · 07-23-2009, 11:33 AM

Quote:

Originally Posted by Bob64

You cant.

I thought so.

Quote:

Originally Posted by Bob64

BUT chances are, if your below 80amps going into the battery, chances are your using regenerative braking. If you see over 80-100 amps, you'll feel the friction brakes kick in.

60amps is the sweet spot for regeneration.

So if I see a stop sign ahead, instead of coasting regen at about 10 ~ 20A, I should glide and then at the last moment brake regen at 60A?

07-22-2009, 01:47 PM	#12
Bob64 Sapphire of the Blue Sky Join Date: Apr 2007 Location: Virginia Posts: 1,135 My Car: 2007 Prius Model: N/A Package: #2 Thanks: 3 Thanked 9 Times in 9 Posts Friends: 0	Re: Gen II Brake Life - 83K+? You cant. BUT chances are, if your below 80amps going into the battery, chances are your using regenerative braking. If you see over 80-100 amps, you'll feel the friction brakes kick in. 60amps is the sweet spot for regeneration.

07-22-2009, 02:04 PM	#13
SageBrush Senior Member Join Date: Jun 2008 Posts: 1,072 My Car: 2004 Prius Model: Package: #9 Thanks: 103 Thanked 59 Times in 43 Posts Friends: 4	Re: Gen II Brake Life - 83K+? Wayne Brown: http://privatenrg.com/#100kBrakePads If I'm bored I'll check the pad thickness at 150k miles.

07-22-2009, 02:53 PM	#14
bruceha_2000 Senior Member Join Date: Jan 2004 Location: South Burlington, VT Posts: 2,549 My Car: 2004 Prius Model: Package: #8 Thanks: 6 Thanked 17 Times in 16 Posts Friends: 1	Re: Gen II Brake Life - 83K+? Like they said Even in 'regular' vehicles, the number of miles on the odometer isn't necessarily indicative of brake life. Mostly Interstate will last a LOT longer than mostly city. Unless the prior owner continued to drive like they did in their old car, you have a LOT of pad left. You can certainly measure them just so you know where YOU are starting. I think my pads will last more miles than my wife's. 1) She waits longer before she brakes for stop signs, I suspect she hits the pads well above 8 MPH while I rarely do 2) 85% of her driving is city and I have probably 40% Interstate miles. Still have 70%+ at 93K miles Even so, she shouldn't have a problem getting to 100K on them __________________ Bruce Mine: Driftwood '04 BC 24 Sept 2004 - added: mudflaps, door edge guards, side panel moldings, Coastal Tech EV switch, OEM Integrity tires, WeatherTech window deflectors. Last tank - 14 Jul '09: 728.9 miles - MFD MPG: 56.0 Actuals Lifetime: 93,087.3 miles, 48.90 MPG. Wife's: Barcelona '06 #7 May 2006 - added: front mudflaps, Coastal Tech EV switch. OEM Integrity tires. Last tank - 21 May '09: 419.4 miles - MFD MPG: 46.7 Actuals Lifetime: 31571.4 miles, 44.82 MPG.

07-22-2009, 03:27 PM	#15
krousdb Senior Member Join Date: Jul 2005 Location: Raleigh, NC Posts: 405 My Car: 2004 Prius Model: I Package: #7 Thanks: 9 Thanked 297 Times in 185 Posts Friends: 10	Re: Gen II Brake Life - 83K+? 176,000, brakes are still original.

07-22-2009, 06:08 PM	#17
lys AerodynamicMac Join Date: Jan 2008 Location: SouthWest Europe Posts: 66 My Car: 2008 Prius Model: N/A Package: N/A Thanks: 1 Thanked 1 Time in 1 Post Friends: 0	Re: Gen II Brake Life - 83K+? Fortunatly I can apply the pads under 8 MPH. In opposite case I'm afraid they could get unchanged the whole life of the car, (and rust in the middle of the life) (Really rare city use)

07-23-2009, 08:22 AM	#19
CBarr31 Senior Member Join Date: Sep 2007 Location: Charlotte, NC Posts: 152 My Car: 2006 Prius Model: Package: #7 Thanks: 10 Thanked 4 Times in 4 Posts Friends: 0	Re: Gen II Brake Life - 83K+? 160,000 Miles ... still original brake pads. Happy Driving, Chris

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Brake Life???	tomforst	Gen II Prius Main Forum	17	05-04-2009 08:26 PM
Brake, Brake warning, ABS, VSC appear	popptj	Gen II Prius Care, Maintenance and Troubleshooting	5	12-22-2008 08:08 PM
Is the Rear Brake Applied Everytime I brake?	GusTheCat	Gen II Prius Technical Discussion	5	11-21-2008 11:13 PM
ABS brake warning on 2007 Prius leading to brake failure	adk235	Gen II Prius Care, Maintenance and Troubleshooting	4	08-05-2008 07:02 PM
A Day in a Life	hycamguy07	Fred's House of Pancakes	13	06-14-2006 01:42 PM