Scosche SABW525 Speaker Mounting Brackets

Install 5-1/4" or 6-1/2" speakers in select 1999-06 BMW 3-Series models

Item #: 142SABW525

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Scosche SABW525

Scosche SABW525 brackets will allow you to install select 5-1/4" or 6-1/2" speakers in the factory speaker openings of select 1999-06 BMW 3-Series vehicles. Please enter your vehicle information or call an Advisor at 1-888-955-6000 to confirm that these adapters are compatible with your vehicle. Warranty: 60 days.

Important Note: Some 6-1/2" speakers use a larger frame and require a larger cutout. We call these 6-3/4" speakers, and they won't fit in this bracket. This bracket will only work with speakers that require a cutout diameter of 5-1/8" or less.

Note: Most vehicles will require additional installation parts — please identify your vehicle if you haven’t done so, then check here for a list of parts. You can also call an Advisor for more information.

Hands-on research

What's in the box?

Download owner's manual

  • Two speaker adapter brackets
  • Six M4x18mm Machine screws

Product Research


Overview: The SABW525 is compatible with many 1999-2006 3 Series BMWs, designed to allow easy replacement of the factory speakers with select aftermarket 5-1/4 and 6-1/2 speakers. (Please refer to the Crutchfield Vehicle Selector to confirm fit in your vehicle.)

5-1/4 Speakers: While a 5-1/4 speaker will mount easily in this bracket given the bolt pattern, the frame of many 5-1/4s is smaller than the opening in the bracket, possibly making a 6-1/2 a better fit. When using a 5-1/4, a speaker baffle will likely be needed to seal the rear of the speaker.


  • Outer Diameter: 6.215"
  • Inner Diameter: 5.085"
  • Height: 0.155"
  • Screw Hole Spacing:
    • Four Hole Pattern:
      • Perimeter: 3.70" to 3.96"
      • Diagonal: 5.25" to 5.58"
    • Three Hole Pattern:
      • Perimeter: 4.55" to 4.82"

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Scosche SABW525 Speaker Mounting Brackets Reviews

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Written By BMW 1, Los Angeles, CA on Friday, January 16, 2015

Crutchfield Customer Review (What's this?)

Great product.

Decent fitment

Written By NealH, San Diego, CA on Thursday, December 18, 2014

Crutchfield Customer Review (What's this?)

I purchased these in the past for the front door location on my 99 BMW 328i e46 sedan. Bolted up without any problem. It's a decent solution for a very weird factory mounting. These also work for the rear deck speakers, which is what I used this latest order for. The tabs used to locate the bracket to the 3 factory mounting holes are a little tall. Not sure why they molded them this way because the bolts end up hitting the speaker grill because they sit up to high. Can easily be solved by grinding a few mm of plastic away.

Pros: Can be used to retrofit generic (cheaper) speakers in the factory location

Cons: Fitment could be better.

Good but needed some modification

Written By Tim, Franklin, tn on Tuesday, July 15, 2014

Crutchfield Customer Review (What's this?)

Mounts were fine for front door location although self tapping screws provided were 1/2" too long. Rear parcel shelf mounts needed mods as they left the speakers too high to then allow stock grilles to mount back flush.

Pros: Sturdy

Cons: Mods tequired

Will NOT fit 6.5" speakers

Written By Michael, Jackson, MS on Monday, July 07, 2014

Crutchfield Customer Review (What's this?)

I have a 2001 BMW 330i. I ordered these to use with some 6.5" speakers from another online retailer. They will NOT fit a 6.5" speaker. They only fit 5.25" speakers. Even the label on the package states "Front Door 5.25" Speaker Adapter". The physical width of the adapter is 6". The mounting holes of a 6.5" speaker are clearly visible on the outside of this plastic adapter.

Pros: Fit's BMW mounting holes and a 5.25" speaker.

Cons: Only works with 5.25" speakers.

Crutchfield response on Wednesday, July 09, 2014 This is the best prefab bracket available for this car, which is why we offer it. Some 6-1/2" speakers have an oversized frame and won't work with these brackets (such speakers are often marketed as both 6-1/2" and 6-3/4" speakers, but some are a just poor fit). Our Tech Support team is always a good resource for troubleshooting situations like this, and if it doesn't work out, the bracket can be returned for a refund, thanks to our 60-day money back guarantee.

Speakers Made Easy

Written By Nick, North Dartmouth, MA on Wednesday, June 18, 2014

Crutchfield Customer Review (What's this?)

Makes the installation of aftermarket speakers a breeze. Normally custom adapters have to be fabricated to mount speakers in these vehicles (as they attach to the door cars itself), but these adapters make it super easy.

Pros: Easy to use, comes with necessary hardware.

Cons: May not fit all 6.5".

Speaker Bracket

Written By S, Greer, SC on Sunday, February 16, 2014

Crutchfield Customer Review (What's this?)

Relatively good bracket, but it is not a perfect fit. Also it need to come with instructions and an installation diagram.

Pros: Good fit

Cons: No instructions

Not the fit you're looking for

Written By ArvM, Los Angeles, CA on Wednesday, December 18, 2013

Crutchfield Customer Review (What's this?)

Wouldn't fit in the factory bracket, not would it accommodate the speaker. Needed to hack into the ring to get the right fit- counter intuitive for an 'adaptor'.

Pros: Solid construction, Crutchfield service

Cons: Doesn't fit...

BMW speaker mounts

Written By G-Man, Hammonton on Sunday, November 24, 2013

Crutchfield Customer Review (What's this?)

Did not fit properly had to rig it but not happy

Pros: none

Cons: Did not work had to cut it up and still not holding properly

Crutchfield response on Tuesday, November 26, 2013 We forwarded this review to our Technical Support team for follow-up. Lifetime tech support comes with every Crutchfield purchase.

Not even close

Written By Ryan, Sasebo, Japan on Wednesday, September 04, 2013

Crutchfield Customer Review (What's this?)

I ordered these to the understanding that it would fit my 316ti. Not only was it not a direct fit, but it was able to be fabricated in any way shape or form. Bolt pattern, size, and depth all were wrong. Not to bummed though bc I only paid $ for the pair. Still love Crutchfield. Im active duty overseas and their free fast shipping beats this one bad experience.

Pros: none

Cons: all


Written By Anonymous, Miami Florida on Sunday, July 07, 2013

Crutchfield Customer Review (What's this?)

The brackets didnt have instructions on how to use them they just give you screws and washers and there wasn't enough screws use on every attachment point

Pros: Adapts speaker to car

Cons: Difficult to use

Works Great (rear deck)

Written By Ray, Akron, OH on Tuesday, July 02, 2013

Crutchfield Customer Review (What's this?)

Used these in the rear deck of my 2000 BMW 323Ci coupled to MTX TNS65 6.5in speakers in the rear deck (OEM ones fell apart). There weren't pre-drilled holes, so I called Crutchfield. Got an immediate answer. Simply drill into the bracket and put some pan head screws in and you're good to go. The stock grill even sort of fit over the speakers, so no need to use the aftermarket grill.

Pros: Fit, sturdy, easy to use (once I found out you had to drill into them)

Cons: No pre-drilled holes for 6.5in speakers (maybe a small piece of paper that notes this would be good)

bmw e46 front door fit

Written By e46 speaker upgrad, pa on Sunday, June 16, 2013

Crutchfield Customer Review (What's this?)

fit perfectly in the front doors of bmw 46 with hk factory system and with 6.5" speaker upgrade.

the rear deck i have not install yet ,will post when i do.

far as bmw e46 this brackets works its a matter of finding speakers that will work with the brackets and the car.

Pros: works perfectly in the front doors.

Cons: none, some say its plastics yes it is but it works.

speakers adapter bracket

Written By vic, Houston, TX on Monday, June 10, 2013

Crutchfield Customer Review (What's this?)

easy installation and can adapt any sizes for bmw

Pros: excellent product

It's plastic

Written By MattN, Cameron, NC on Saturday, January 19, 2013

Crutchfield Customer Review (What's this?)

I'm keeping my expectations low for this one and expecting it to break in the near future. I used it to secure Polk DB-651s speakers in my 2003 BMW E46. The bracket does NOT attach to the speaker, and the speakers are NOT attached to the door panel. So, pretty much my speakers are just behind held in there by a piece of plastic pushing down on it. There were no instructions on how to put them on there either. The three bolts only fit in there with barely one full turn before the bracket started bending. The tabs on the brackets are bending down about 1/4" from their original position, and that was just so the speaker wouldn't slide around. With that much tension on the tabs, it's only a matter of time before something breaks and my speakers slide into my door.

Pros: Speakers are mounted.

Cons: No instructions. Plastic.

Crutchfield response on Monday, January 21, 2013 We forwarded this review to our Technical Support team for follow-up. Lifetime tech support comes with every Crutchfield purchase.

Needs mo einformation

Written By kirka, atlanta on Sunday, July 15, 2012

Crutchfield Customer Review (What's this?)

The bracket came with no instructions and even calling in was not much help. I am not sure if I was sent the wrong bracket as the label said front door and i was installing in rear deck.

Pros: Easy to use

Cons: No instructions left me installing it twice.


Written By Nathan H, Leawood on Friday, June 08, 2012

Crutchfield Customer Review (What's this?)

This product is well made but it would not work for my 6.5" Polk Audio speakers. Tried multiple times to get them to fit properly, ended up buying wood and making my own custom speaker adapters. Money down the drain.

Aftermarket speakers in E46 = Buy this!

Written By Jamie, CO on Monday, April 02, 2012

Crutchfield Customer Review (What's this?)

Great little adaptors. OEM BMW speakers have three offest tabs which won't work with aftermarket speakers. These adaptors are a perfect interface between aftermarket speakers and the OEM door panels.

Pros: Cheap product vs making your own spacers. Different mounting tabs for various aftermarket speakers.

Cons: None for this price. Make sure your aftermarket speakers come with screws that will work with this plastic adaptor plate.


Written By ped2, Baltimore MD on Tuesday, September 27, 2011

Crutchfield Customer Review (What's this?)

Quick installation, perfect fit!

MUST HAVE for e46 owners

Written By kenner, SC on Monday, January 31, 2011

Crutchfield Customer Review (What's this?)

A must for all e46 BMW owners - these brackets worked like a champ in front doors
allowing a 6.5 inch speaker with low profile teater to fit with only minor mods of
aftermarket screws and additional foam spacers, to kill rattles. These even allowed me
to install 6.5 inch, low profiles in back deck, with same mods, however, I had to use the
factory grills -- the BMW grills wouldn't allow enough clearance for the tweeter cones --
note that asthetics of back deck application described will not satisfy those who want to
keep factory appearance.

It works, but not out of the box

Written By Bernard, Princeton,NJ on Monday, May 03, 2010

Crutchfield Customer Review (What's this?)

You can make this work, but it's not a trivial bolt in.
-Pay attention to the picture. It may look like the mounting holes are evenly spaced but they're not; there is a definite orientation. This also affects wiring.
-Note the ridges on the mounting holes; they really must go toward the speakers, which means for mine (Polk DB 521's), the Scosche frame gets bent, unless you file down three of them that are unused. If your speakers can mount on the front and stick through without interference, this might not be needed. Mine could not.
-The supplied 4 mm screws are 3-4 mm too long for the mounting holes (I have a 2003 325xi); you could use washers to space, I used shorter screws.
-Speaker mounting screws supplied were flimsy sheet metal; also replaced these.
-No info on which BMW wire is + or -; found on another site. (Left +: Blue w/ white stripe, Right+, Blue w/ red stripe)
-Would have been good if they supplied terminals to plug into the existing connector; again made some. Alternative is to solder your speakers in directly (bad idea for future maintenance) or cobble up another connector (get insulated pairs)

Overall the need is for proper parts and an instruction sheet. A Scosche instruction sheet would have saved me a lot of time. Generic one from Crutchfield isn't too useful.

Two other hints: if your car has the foam gasket around the speaker, reuse it. Also, be smart to have a few of the door male plastic clips; several of mine were pre-broken.

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