Notices
C5 General General C5 Corvette and C5 Z06 Discussion not covered in Tech

c5 EBCM

Thread Tools
 
Search this Thread
 
Old Nov 26, 2023 | 07:55 PM
  #21  
JMG2's Avatar
JMG2
Moderator
Supporting Lifetime Gold
20 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Apr 2002
Posts: 11,764
Likes: 1,359
From: US
Default

Originally Posted by yellow2007
Probably somewhat true but unless BOSCH holds the patent on these, I don't see where any company would be exposed to any liability that GM itself wasn't exposed to. I mean ABSfixer takes the same chance by rebuilding them.
whether bosch holds a patent has nothing to do with the liability a third party making a replacement would potentially have.
If someone makes a replacement EBCM, it's on the manufacturere to make it work correctly, and if it fails, they could potentially be open to liability.

Last edited by JMG2; Nov 27, 2023 at 08:35 AM.
Reply
Old Nov 26, 2023 | 08:04 PM
  #22  
jackthelad's Avatar
jackthelad
Melting Slicks
10 Year Member
 
Joined: Jun 2013
Posts: 3,473
Likes: 691
From: West Virginia
Default

Originally Posted by JMG2
whether bosch holds a patent has nothing to do with the liability a third party making a replacement would potentially have.
If someone makes a replacement EBCM, it's on the manufacturer to make it work correctly, and if it fails, they could potentially be open to liability.
As an ex vehicle design engineer, you are dead right. No small company in their right mind would try to produce an EBCM. One accident that lawyers (good ethical people that they are...) could tie to the replacement EBCM and you would be out of business at best. In jail at worst.

Last edited by JMG2; Nov 27, 2023 at 08:35 AM.
Reply
Old Nov 26, 2023 | 11:20 PM
  #23  
RC81's Avatar
RC81
Burning Brakes
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2000
Posts: 763
Likes: 281
From: Middleton, Id
Default

And yet a case cant be made for not keeping a needed safety device available? Would think a case could be made" I could have stopped but my ABS is inactive and GM wont sell a replacement part". Can work it both ways I would think.
Reply
Old Nov 27, 2023 | 08:29 AM
  #24  
JMG2's Avatar
JMG2
Moderator
Supporting Lifetime Gold
20 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Apr 2002
Posts: 11,764
Likes: 1,359
From: US
Default

Originally Posted by jackthelad
As an ex vehicle design engineer, you are dead right. No small company in their right mind would try to produce an EBCM. One accident that lawyers (good ethical people that they are...) could tie to the replacement EBCM and you would be out of business at best. In jail at worst.
hey now... there are some good people that are lawyers... some of them on this forum.. maybve one or two in this thread :-)

Reply
Old Nov 27, 2023 | 08:34 AM
  #25  
JMG2's Avatar
JMG2
Moderator
Supporting Lifetime Gold
20 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Apr 2002
Posts: 11,764
Likes: 1,359
From: US
Default

Originally Posted by RC81
And yet a case cant be made for not keeping a needed safety device available? Would think a case could be made" I could have stopped but my ABS is inactive and GM wont sell a replacement part". Can work it both ways I would think.
you mean you knew your EBCM wouldn't stop, and you drove it despite knowing that?
The brakes still work, you just lose antilock. Seems in your hypo it's your fault for driving a car you knew didn't have antilock, and not being better prepared to handle it.


Reply
Old Nov 27, 2023 | 08:44 AM
  #26  
Gordy M's Avatar
Gordy M
Melting Slicks
25 Year Member
Active Streak: 30 Days
Conversation Starter
All Eyes On Me
 
Joined: Feb 2001
Posts: 2,801
Likes: 356
From: Northville, MI
Default

The pre-2001 EBCM were made by Bosh, The reason they have not made a production run is GM has not placed an order for them. SEMA has a newer testing facility near the Bosh US headquarters and has been able to have several items made from them and other OEM's on specialty runs for different car makes. However, the C5 Corvette EBCM was not used on other cars although a few GM models were thought to be using it. Last winter I went on CF and other forums to find out is any other cars used that module and did not receive one usable answer. Some suggested a Buick or Cadiillac used it but never a year(s) or specific module. If we could get an accurate and verifiable count I could go to SEMA and see if they could influence a production run.
Reply
Old Nov 27, 2023 | 08:47 AM
  #27  
bookyoh's Avatar
bookyoh
Pro
10 Year Member
All Eyes On Me
Liked
Loved
 
Joined: Dec 2014
Posts: 681
Likes: 275
From: Cincinnati Ohio
Default

Lots of discussion that has likely appeared in the many many past threads on this EBCM topic. Has anyone noticed that the OP has not commented since his/her original 11/24 thread starter?
Reply
Old Nov 27, 2023 | 12:29 PM
  #28  
grinder11's Avatar
grinder11
Race Director
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Oct 2004
Posts: 12,859
Likes: 4,658
Default

Originally Posted by Dads2kconvertible
Yellow, if you were so inclined you could MAKE a replacement visor. How perfect it would be depends on how much time and effort you want to put into it.

In the case of computer parts, you can't. Right now it is a practical impossibility to make old computer chips. The equipment is too expensive and companies often have not released the relevant information (drawings and computer code).

If Bosch/GM would release the information (board layout and any needed computer code) it might be possible to repair a malfunctioning board with modern components. People have done that for old boards in other industries.
We would still have to figure out how to dissolve the encapsulant without destroying the rest of the components.
GM may not even have the original blueprints/schematics to produce the part. When the C5 was engineered and built, downsizing and outsourcing (aka; GREED) were extremely popular. I'm not saying they aren't popular still, but some companies are realizing contractors and contract companies/vendors don't always have the same dedication (Linimar?) as in-house employees. When GM decided on Bosch, Bosch may have insisted their technology was proprietary, and refused to release any drawings. Bosch has said publicly (info is out there) they will never manufacture the EBCM again. Market size is also important. Since probably no more than maybe 20% of the C5s (that is probably considerably more than actual) have experienced a failure, and many of those may be in the scrap yard, I have a feeling the market for an EBCM for a 20-27 year old car is very finite. My opinion......
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-1

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-2

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-3

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-4

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-5

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-6

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-7

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-8

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
story-9

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
Old Nov 27, 2023 | 01:02 PM
  #29  
grinder11's Avatar
grinder11
Race Director
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Oct 2004
Posts: 12,859
Likes: 4,658
Default

Originally Posted by JMG2
whether bosch holds a patent has nothing to do with the liability a third party making a replacement would potentially have.
If someone makes a replacement EBCM, it's on the manufacturere to make it work correctly, and if it fails, they could potentially be open to liability.
Thanks. You've said exactly what I was trying to express....
Reply
Old Nov 27, 2023 | 02:01 PM
  #30  
JMG2's Avatar
JMG2
Moderator
Supporting Lifetime Gold
20 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Apr 2002
Posts: 11,764
Likes: 1,359
From: US
Default

Originally Posted by Dads2kconvertible
We would still have to figure out how to dissolve the encapsulant without destroying the rest of the components.
This, ultimatly, is the real issue.
There are several off-the-shelf chips, caps, and I believe vrm that are super easy to replace. The issue is that on pre '01, it's all dipped in an encapsulant, and no one has figured out how to dissolve all of that without destroying the board.

IT's also why '01 and newer can be fixed *in some instances*. it's not dipped in encapsulant (or not all of it is coated) If the issue is a broken trace, a dead cap, or something similar, it can be fixed. But if for some reason the eprom is dead, the post '01 is just as unfixable as the pre '01.

But again, it's been said many many times, ebcm issues are few and far between. it's a far overstated issue.
Reply
Old Nov 27, 2023 | 02:14 PM
  #31  
Dads2kconvertible's Avatar
Dads2kconvertible
Melting Slicks
 
Joined: Sep 2021
Posts: 2,555
Likes: 1,213
Default

Originally Posted by Gordy M
The pre-2001 EBCM...
...was not used on other cars although a few GM models were thought to be using it. Some suggested a Buick or Cadiillac used it but never a year(s) or specific module.
GM Parts Direct listing says only used on 98, 99, 2000 Corvettes. Same for the version without active handling. Looking at Chevrolet's website directly, and Napa, Advance Auto, Autozone, and Oreilly I don't see the module at all. Even Rock Auto doesn't list it, the closest they have is the 97 version.
Originally Posted by Gordy M
If we could get an accurate and verifiable count I could go to SEMA and see if they could influence a production run.
What do you want a count of?
Can you ask them what the minimum order and price per unit is? At least we would have an idea of how much money it's going to take.
Reply
Old Nov 27, 2023 | 04:46 PM
  #32  
Gordy M's Avatar
Gordy M
Melting Slicks
25 Year Member
Active Streak: 30 Days
Conversation Starter
All Eyes On Me
 
Joined: Feb 2001
Posts: 2,801
Likes: 356
From: Northville, MI
Default

What year and model cars used the same EBCM example would be 1998 Cadillac Seville, 1999 Buick LaSabre, etc ( those were not actual models that had the same EBCM but an exmple of the data we would need)
Reply
Old Nov 27, 2023 | 05:39 PM
  #33  
road pilot's Avatar
road pilot
Le Mans Master
Supporting Lifetime
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Feb 2007
Posts: 9,291
Likes: 1,523
From: Oviedo Florida
2024 C5 of the Year Finalist - Modified
2024 C2 of the Year Finalist - Modified
2023 C2 of the Year Finalist - Modified
2021 C2 of the Year Finalist - Modified
2016 C5 of Year Finalist
Default

Originally Posted by JMG2
This, ultimatly, is the real issue.
There are several off-the-shelf chips, caps, and I believe vrm that are super easy to replace. The issue is that on pre '01, it's all dipped in an encapsulant, and no one has figured out how to dissolve all of that without destroying the board.

IT's also why '01 and newer can be fixed *in some instances*. it's not dipped in encapsulant (or not all of it is coated) If the issue is a broken trace, a dead cap, or something similar, it can be fixed. But if for some reason the eprom is dead, the post '01 is just as unfixable as the pre '01.

But again, it's been said many many times, ebcm issues are few and far between. it's a far overstated issue.
I have been through 3 in 45k miles. Tell me about "few and far between"?
Reply
Old Nov 27, 2023 | 08:02 PM
  #34  
JMG2's Avatar
JMG2
Moderator
Supporting Lifetime Gold
20 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Apr 2002
Posts: 11,764
Likes: 1,359
From: US
Default

Originally Posted by road pilot
I have been through 3 in 45k miles. Tell me about "few and far between"?
you've had a string of bad luck. The fact is that it's a rare occurance. Sadly it hit you three times. which sucks, but doesn't change the fact that it doesn't fail that often.
Reply
Old Nov 27, 2023 | 08:03 PM
  #35  
JMG2's Avatar
JMG2
Moderator
Supporting Lifetime Gold
20 Year Member
Liked
Loved
Top Answer: 1
 
Joined: Apr 2002
Posts: 11,764
Likes: 1,359
From: US
Default

Originally Posted by Dads2kconvertible
GM Parts Direct listing says only used on 98, 99, 2000 Corvettes. Same for the version without active handling. Looking at Chevrolet's website directly, and Napa, Advance Auto, Autozone, and Oreilly I don't see the module at all. Even Rock Auto doesn't list it, the closest they have is the 97 version.

What do you want a count of?
Can you ask them what the minimum order and price per unit is? At least we would have an idea of how much money it's going to take.
I bought a few of these back in the day and have them sitting on a shelf -- best bet is to find a racing outfit that's running c5's ... they're not as prolific these days as they used to be, but even a one off racer that's serious typically they'll rip out the EBCM and put in a racing unit. I got several for a few hundred each.
Reply
Old Nov 28, 2023 | 10:49 AM
  #36  
grinder11's Avatar
grinder11
Race Director
Liked
Loved
Community Favorite
Top Answer: 1
 
Joined: Oct 2004
Posts: 12,859
Likes: 4,658
Default

I believe part of the problem is many, and I'll go so far as to say most, don't brake hard enough, or drive on slippery roads often enough (winter stored cars) to activate the antilock feature. This may lead to the pump freezing up. Like many things electrical and mechanical, if you dont use it, you may lose it.......
Reply
Old Nov 28, 2023 | 01:24 PM
  #37  
Pounder's Avatar
Pounder
1/4 mile/AutoX
Supporting Lifetime
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2014
Posts: 11,439
Likes: 2,184
From: Buffalo Texas
Default

Originally Posted by grinder11
I believe part of the problem is many, and I'll go so far as to say most, don't brake hard enough, or drive on slippery roads often enough (winter stored cars) to activate the antilock feature. This may lead to the pump freezing up. Like many things electrical and mechanical, if you dont use it, you may lose it.......

the main reason I bought a Tech2, to do the autobleed on the brake system, did my 99 every 10,000 miles. drove it 70,k with no issues ??
Reply

Get notified of new replies

To c5 EBCM

Old Nov 28, 2023 | 07:14 PM
  #38  
davidzink's Avatar
davidzink
Thread Starter
3rd Gear
 
Joined: Nov 2023
Posts: 3
Likes: 1
Default

Originally Posted by bookyoh
Lots of discussion that has likely appeared in the many many past threads on this EBCM topic. Has anyone noticed that the OP has not commented since his/her original 11/24 thread starter?
I have not commented because I don't know what to say.

My auto mechanic removed the EBCM and tells me it was burnt (he took it apart). I was not there, so i can't verify. Have been pursuing the used part route. People are generally looking for $2500 or more. On a couple of attempts at actually buying a used EBCM, they have also been burned out. People have been putting these up for sale in unusable condition.
Reply
Old Nov 29, 2023 | 07:49 AM
  #39  
leadfoot4's Avatar
leadfoot4
Team Owner
20 Year Member
Active Streak: 60 Days
Active Streak: 90 Days
Community Builder
 
Joined: May 2001
Posts: 87,302
Likes: 1,583
From: Western NY
Default

Originally Posted by grinder11
I believe part of the problem is many, and I'll go so far as to say most, don't brake hard enough, or drive on slippery roads often enough (winter stored cars) to activate the antilock feature. This may lead to the pump freezing up. Like many things electrical and mechanical, if you dont use it, you may lose it.......
Good point. Although I don't do it on a regular basis, I do exercise my 2001 EBCM at least once a year, in a large, grassy plot of land that's near where I live. Even so, however, my unit still went bad, a couple of years ago. Fortunately, 'absfixer' was able to repair it.......
Reply
Old Nov 29, 2023 | 09:09 AM
  #40  
bookyoh's Avatar
bookyoh
Pro
10 Year Member
All Eyes On Me
Liked
Loved
 
Joined: Dec 2014
Posts: 681
Likes: 275
From: Cincinnati Ohio
Default

I cannot personally vouch for them but Killain suggested you contact Mercer Corvette. They claim to offer a 1 year warranty.
Reply



All times are GMT -4. The time now is 10:29 AM.

story-0
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-1
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-2
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-3
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-4
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-5
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-6
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-7
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-8
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-9
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE