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This post is to share my recent experiences with fixing the ABS Unit on my Mazda 3 2009 BL series auto.

Note: this info relates to the Australian car market. Your kilometers may vary.

On the car's dash, both the ABS light and DSC/TCS light had come on, but braking performance seemed to be fine, so I ignored it for a long time. Recently I was told that (in Australia) I wouldn't be able to get a RWC and therefore couldn't sell the car without fixing it. Sigh. Time to bite the bullet.

A diagnostic scan reported the dreaded code C0020 (ABS pump motor circuit voltage out of range) and also U0415 (Invalid data received from ABS control module). It's a common problem apparently.

The Mazda dealership, quietly rubbing their hands with glee, quoted $2100+ (AUD) to fix it. What a joke.

So after many phone calls, I found that the going rate for a one-stop repair job was around $1000-$1200. Still too much.

To cut a long story short, I have found three companies that actually do these ABS repairs in-house:
- Injectronics, Vic ($700, but you have to go through their dealer network),
- Cooldrive, Brisbane (same - wholesale only, no punters, no price offered),
- ABSRepair.com.au, Sydney (very friendly, accessible, open to the public, $495, cheaper, faster and better than the other two).

The good folk at ABSRepair.com.au also referred me to an independent repairer, Sam, who repairs many different ECU, TCM and ABS devices through EBay (I can't post a link here, but just search for the seller 'ecu-fix'). He has a great seller reputation and offers a 5 year warranty. $350+postage, with a 48 hour turnaround. Too good to ignore!

But how to remove and refit the ABS unit? This was beyond my skills. The ABS unit is in a tight corner behind the battery. The refit involves bleeding the brake lines, and resetting the car's diagnostic system. Luckily my local Ultratune shop saved the day. These guys are great, and did not mind having a dead car parked on site for a few days while the ABS was repaired.

So all-up the final cost was $350 + $40 postage + $235 R&R = $625, which I reckon is much closer to the true cost of a job like this. In the end it all went smoothly, and now my ABS is as good as new, with no dash lights showing. Yay!

So if you have a faulty ABS unit, I hope this helps. Don't just give the job to Mazda! Good luck.

P.S. I have no affiliations with the above companies, other than as a customer.
 

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This post is to share my recent experiences with fixing the ABS Unit on my Mazda 3 2009 BL series auto.

Note: this info relates to the Australian car market. Your kilometers may vary.

On the car's dash, both the ABS light and DSC/TCS light had come on, but braking performance seemed to be fine, so I ignored it for a long time. Recently I was told that (in Australia) I wouldn't be able to get a RWC and therefore couldn't sell the car without fixing it. Sigh. Time to bite the bullet.

A diagnostic scan reported the dreaded code C0020 (ABS pump motor circuit voltage out of range) and also U0415 (Invalid data received from ABS control module). It's a common problem apparently.

The Mazda dealership, quietly rubbing their hands with glee, quoted $2100+ (AUD) to fix it. What a joke.

So after many phone calls, I found that the going rate for a one-stop repair job was around $1000-$1200. Still too much.

To cut a long story short, I have found three companies that actually do these ABS repairs in-house:
  • Injectronics, Vic ($700, but you have to go through their dealer network),
  • Cooldrive, Brisbane (same - wholesale only, no punters, no price offered),
  • ABSRepair.com.au, Sydney (very friendly, accessible, open to the public, $495, cheaper, faster and better than the other two).

The good folk at ABSRepair.com.au also referred me to an independent repairer, Sam, who repairs many different ECU, TCM and ABS devices through EBay (I can't post a link here, but just search for the seller 'ecu-fix'). He has a great seller reputation and offers a 5 year warranty. $350+postage, with a 48 hour turnaround. Too good to ignore!

But how to remove and refit the ABS unit? This was beyond my skills. The ABS unit is in a tight corner behind the battery. The refit involves bleeding the brake lines, and resetting the car's diagnostic system. Luckily my local Ultratune shop saved the day. These guys are great, and did not mind having a dead car parked on site for a few days while the ABS was repaired.

So all-up the final cost was $350 + $40 postage + $235 R&R = $625, which I reckon is much closer to the true cost of a job like this. In the end it all went smoothly, and now my ABS is as good as new, with no dash lights showing. Yay!

So if you have a faulty ABS unit, I hope this helps. Don't just give the job to Mazda! Good luck.

P.S. I have no affiliations with the above companies, other than as a customer.
Thanks for sharing this, I have EXACTLY the same car Mazda 3 2009 BL Series and have the Exact error code C0020 which is ABS module fault and needs overhauling. I got quoted $1300 aprox but since I read your post and live in Brisbane, I’ll go and get multiple quotes to get a better price.
Cheers,
 

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Thanks for sharing this, I have EXACTLY the same car Mazda 3 2009 BL Series and have the Exact error code C0020 which is ABS module fault and needs overhauling. I got quoted $1300 aprox but since I read your post and live in Brisbane, I’ll go and get multiple quotes to get a better price.
Cheers,
I too am in Brisbane with the same problem, so would love to know where you ended up going too. I have been quoted over $2000 by the company for a new one plus labour.
 

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Hi, I went to LeMans Gabba in Brisbane it's $1300
I've the same problem with my 2009 BL Mazda 3 with only 50000 klm on the clock. I asked the the company, to come to the party, unfortunately they declined. They quoted $2590 all up. The unusual thing is I've the ABS light on the dash, I connected a obdll to the ECU. The ECU read that there was no codes stored in the ECU unit, can anyone help me with this problem cheers Bruce.
105520
 

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Hi, I'm not sure whether I have the same problem, but here goes.

I have a 2009 Mazda3 BL with 80,000 km on the clock. A couple of weeks ago the ABS and TCS lights came on at the same time. After a few days the lights went off, and after another few they came back on again. This happened a couple of times, now the ABS light is on constantly and the TCS light comes on about 10 seconds after starting the car. Brakes work properly.

I went to see my mechanic for a diagnostic test and got these fault codes:
C006A95 Acceleration Sensor / Incorrect Configuration
U300316 Battery Voltage / Circuit Voltage Below Threshold
U042862 Steering Angle Sensor Module / Invalid Data Received
C00201C ABS Pump Motor Control / Circuit Voltage Out Of Range
U041592 CAN-message: ABS/ESP Control Module / Invalid Message

My mechanic couldn’t pinpoint the problem based on the fault codes and suggested to start taking things apart. Any ideas how to fix this?
 

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Managed to solve the problem of the ABS and DSC/TCS lights being on constantly. The Mazda dealership diagnosed a fault with the ABS module (fault codes C00201C and U041592) and with a straight face quoted €1700 for a replacement. It can actually be fixed but they don't do it. I found an independent ABS specialist where they removed, fixed and reinstalled the ABS module in a couple of hours for a fraction of the cost. Try to look for one of these in your area after getting the correct diagnostic from your dealership.
 

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Hi, sorry if this is the wrong section to post but I have, what I think, is a simple question. I need to replace my ABS unit on my 2012 Mazda 3. The current part number is BFD1-437AZ-C. I'm findinmg it diffiuclt to find that exact part for replacement. Can anyone let me know if a BFD2-437AZ can be substituted? There are quite a few ABS units issued in 2012 and I want to make sure the part fits and is recognized by the CPU.

thanks for your help in advance
 

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Hi, i am new in this forum. I have a Mazda 3 2009 2.0L (BL) getting the same issue with DTC C0020 and U0415. I want to fix it by myself but i haven't find a DSC ABS pump and control unit. Could you tell me how can i find a way to purchase a used DSC/ABS unit? Also, May i know the part number of that DSC/ABS pump unit.
106047
Thank you.
 
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