Mazdaspeed 3 ECU Relocation Battery Box

Introducing the 2007-2013 Mazdaspeed 3 ECU Relocation Battery Box. Protect your ECU, retain your OEM size battery, and provide clearance for up to a 3.5" intake! The battery and ECU relocation box feature a separate front ECU panel to improve ECU fitment as well as allow easier access to the battery. The box is manufactured via thermoforming from durable ABS plastic for a near OEM look and finish. #ZoomZoom!

2007-2013 Mazdaspeed 3 Battery Box Kit Video

Check out the installation instructions below. Share your performance review with the CorkSport community once installed!

The CorkSport Advantage

3.5" Intake Clearance

By relocating the ECU to the battery box interior, the CorkSport ECU Relocation Battery Box protects the ECU from the elements and provides clearance for up to a 3.5" intake.

Design

CAD designed and manufactured from durable ABS, the CorkSport ECU Relocation Battery Box fits great and will stand up to the test of time.

OEM Fitment & Accessibility

The CorkSport ECU Relocation Battery Box features a three-panel design to improve the ECU fitment and battery access.

Performance Hardware

The CorkSport ECU Relocation Battery Box also includes an anodized aluminum battery tie-down bracket and easy-to-access thumb screws for the lid. No tools are necessary to access the battery.

Additional Features

Compatible with:2007-2013 Mazdaspeed 3 with the OEM sized battery.
Designed & Developed in America: CorkSport Mazda Performance resides in Vancouver, Washington and is located in the beautiful Pacific Northwest.
CorkSport Service & Support: 2-year limited warranty, full-color installation instructions, all necessary components, and knowledgeable telephone support at (360) 260-2675.

How To Install Your CorkSport Mazdaspeed 3 ECU Relocation Box

It will take you an hour to install the CorkSport Mazdaspeed 3 ECU Relocation Box with our easy-to-use instructions

1 hour Install Time

2/5 Difficulty

2-Year Warranty

No CEL

box looks nice in car, easy install. The one thing the don't tell you is you need to have the oem battery size no aftermarket that are larger the box top will not fit if your battery isn't small enough. Another great product from corksport thanks again.

Jeff08/29/2016, 01:23 PM

This thing...looks nice in the picture, and when it's finally installed...so to install it...wellllllll...

It took me all of an hour plus a little bit longer to get this into my engine bay. The ECU location looks so easy to deal with in the video, but my experience didn't match up in the same way(I wondered if this was a piece worth installing).

In the end I concluded that the battery in my car - a Mazda-branded cell - is slightly longer than the one in the posted video.

This has reduced the tolerances inside the battery box and therefore made it very challenging to cram everything together to bolt on the top.

Also in conclusion, I like the space now available between the battery box and the TIP, so I still think this is a part worth having.

That space can now be filled with a bigger TIP/SRI when the time comes.

Sean McLeod08/24/2016, 11:18 AM

The box looks great. The install was kind of a pain but after I got the wires routed to was pretty easy. The only thing I don't like about the box is that it's flimsy and feels like its very fragile, the OEM battery box is thicker.

CJ08/09/2016, 06:53 PM

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would this fit the new 4in intake that yall came out with?

Asked by Julio Padron | 08/20/2023, 01:18 PM | 1 answer(s)

box dimensions?

Asked by reynaldo Sanchez | 11/13/2021, 08:00 AM | 1 answer(s)

What are the dimensions of the battery portion of the box/what is the biggest battery that can be put in here. Just wondering if I will be able to fit my current battery in there or if it will have to be replaced.

Asked by Blake | 04/19/2021, 12:27 AM | 1 answer(s)

Do the bolts line up for me to install on a Mazda 3 sedan 07??

Asked by Matthew | 08/02/2020, 01:07 AM | 1 answer(s)

Will this work with a ms6? Would like to use your 3.5 inch intake

Asked by Harry Patton | 09/02/2018, 05:23 PM | 1 answer(s)

Will this fit my 2010 Mazda 3 Grand Touring (non speed)? Any alternatives?

Asked by Roger Palmdick | 01/20/2017, 04:48 AM | 1 answer(s)

If installed with CS front strut tower brace, can the battery be removed without having to remove the brace?

Asked by Elwood buchanan | 11/16/2016, 01:37 AM | 0 answer(s)

Will the optima red 35 fit this btry box also, Thank you

Asked by anthony.c | 09/25/2016, 11:22 AM | 1 answer(s)

Will a 4 inch intake fit with this box or is 3.5 inch the max?

Asked by Quinton | 09/24/2016, 01:24 PM | 1 answer(s)

2008.5 Speed 3, factory hood TMIC/Batt box ducting; I noticed the batt box port is lacking on the CS box, I can only assume this isn't a concern because you haven't included it in your design. At what point should I or might I be concerned about the ventilation of the batt box? Also, looking at my engine bay with the stock(!ugh!) intake box, it looks to me like the CS batt box might be a squeeze on its own (I know, CS SRI would solve that, it's on my 2do list hehehe, 1st things 1st).

Asked by Sean | 08/18/2016, 07:41 AM | 1 answer(s)

Is this designed for a stock sized battery or 51R battery?

Asked by John | 06/15/2016, 11:50 PM | 1 answer(s)

I have 3.5" JBR intake on GTX2867R... will it fit? What if i can't get it to fit, can i return it, and if so, how much $$ to return it?

Asked by Tony | 05/04/2016, 08:10 PM | 1 answer(s)

Is the battery going to crush ecu? The tie down only holds it down, not hold it back.

Asked by Angela Stires | 01/02/2016, 04:43 PM | 1 answer(s)

Will there be fitment issues with a cold air intake box?

Asked by Dominic Shinawatra | 12/29/2015, 07:57 AM | 1 answer(s)

Does this box make it possible to fit easily and use the Corksport 3.5" intake?

Asked by William Fletcher | 12/23/2015, 07:51 PM | 1 answer(s)

I can use this battery box in my mazda 3 s?