2010-2013 Mazda 3
Upgrading the stereo system in your Mazda 3
2010 • 2011 • 2012 • 2013
In brief: This Crutchfield Research Garage article gives you an overview of your Mazda 3's stock stereo system and your aftermarket upgrade options. Use our vehicle selector to find the gear that will fit your car.
Overview of the Mazda 3
In a recent and thoroughly unscientific parking lot survey, we determined that an awful lot of cars these days look like they're annoyed about something. We’re not sure when the "angry cyborg" look became a thing, but there are some current cars that make a 1960 Plymouth Belvedere look like a mall greeter. It's weird.
The Mazda 3 is welcome exception to the current rule. This smart, practical little car looks like it's happy to be here and ready to go do stuff. And in a world full of cars that seem to have a perpetual case of the Mondays, that's pretty cool. When you smile, your Mazda 3 smiles back. And that should make you smile more, which is what a good car should do in the first place.
Whether you have a sedan or a hatchback, you've got a practical, efficient car that's also a lot more fun to drive than the average econobox. The stereo systems are mostly just average, though, so an aftermarket upgrade is a great way to make every drive a lot more enjoyable.
The 3's radios are pretty easy to remove and replace (Crutchfield Research Photo)
Factory stereo system
The 3 was offered with your choice of base or Bose audio systems. The base model included either 4 or 6 speakers, and the Bose system added more rear speakers and a subwoofer.
Depending on how your car is equipped, replacing the factory stereo can mean losing the AUX input, your stock satellite radio, and the navigation system's voice guidance feature. On the upside, all of those can be regained (and, honestly, improved) with a new aftermarket receiver.
Both systems include a factory amp. If you choose a new stereo with front and rear preamp outputs, the discounted wiring harness will connect directly to the new receiver. If you choose a receiver without those outputs, our installation package will include the line converter you'll need to retain use of the amp.
Replacing the radio is easy in this car. Replacing some of the speakers is, um, not so much. It's nothing the average DIY-er can't handle, but there's some extensive disassembly involved in some cases, so you'll need to stay organized and stay patient. And remember that your Crutchfield purchase includes free tech support for the life of the gear. If you have questions, just give us a call.
You can replace the stock radio with single-DIN or double-DIN aftermarket models (Crutchfield Research Photo)
Replacing your factory radio
Before you do anything else, set the parking brake and disconnect the negative battery cable to prevent any electrical short. Once that's done, you're ready to get to work. And since removing the stock radio doesn't involve a lot of work, that's another thing to smile about.
Pry out the center dash vent assembly toward the rear of vehicle to release five retaining clips. Place the assembly on the top of the dash while you keep working. You might want to place a clean shop rag between the two.
Remove two Phillips screws from the brackets at the top of the factory radio, then pull the radio from the dash to release four clips. Disconnect the wiring harnesses and remove the old radio.
Detailed stereo and speaker removal instructions
Installing the new receiver is pretty much that, but backwards. When you buy your receiver at Crutchfield, we'll give you a very nice discount on the dash kit and receiver wiring adapter you'll need to connect the receiver to the factory wiring.
Between the instructions included with each of those and your free Crutchfield MasterSheet, you'll be good to go. Just be sure to test the radio and make sure it's working before you put the dash back together. It's an easy job, but you don't want to do it twice.
Tools needed: Panel tool, Phillips screwdriver
The 3's door speakers are reasonably easy to reach and replace (Crutchfield Research Photo)
Replacing your factory speakers
The 3's speakers are generally pretty easy to deal with, but the rear speakers in the Bose system can present some challenges.
If you're going to replace the radio, you might as well replace the Bose center dash speaker while you're up (Crutchfield Research Photo)
Replacing the Bose center dash speaker
If your 3 has a Bose stereo system, there's a 3-1/2" speaker in the center of the dash. You don't have to replace this speaker if it's working, but if you do want to upgrade, we highly recommend replacing the speaker at the same time you replace the factory radio.
We do so not (just) because we want to sell you a center dash speaker, but because removing the radio is part of the speaker removal process anyway. And since getting to the speaker takes a fair amount of work, this is one of those "While you're up…" scenarios in which the time saved is probably more valuable than the money spent.
There's no speaker wiring adapter available for this location, so you'll need to use Posi-Products speaker connectors to connect the new speaker to the factory wiring. Complete removal instructions can be found in your Crutchfield MasterSheet.
This is a do-able DIY project, but it'll take some time and patience and we want you to know what you're getting into before you get into it.
Tools needed: Panel tool, right-angle Phillips screwdriver, small flat-blade screwdriver
All 3's have component speakers in the front doors (Crutchfield Research Photo)
Replacing the front door speakers
All 3's have woofers and tweeters in the front doors, and this replacement process isn't that bad. You'll need to remove the sail panels and the door panels, but it's not that complicated.
The tweeters come first, because you'll need to remove the sail panels anyway. Pry off the panel to release two retaining clips, then disconnect the wiring harness and remove the panel.
The tweeter is attached to the panel, so you'll need to pry that off and remove it. You'll need to use our universal backstraps (or hot glue or silicone) to attach your new tweeters. You'll also need to use Posi-Products speaker connectors for the tweeters.
To remove the woofers, you'll start by prying out the screw cover behind the door release and removing one exposed Phillips screw. Then you'll pry off the door pull cover and remove two exposed Phillips screws. Pry around the sides and bottom of the door panel to release nine retaining clips, disconnect the door lock and release cables and wiring harnesses, and remove the door panel.
The stock speaker is secured by four Phillips screws. Keep them handy after you remove them, because you'll need them to secure the new speakers. You can use 6"x8" or 5-1/4" aftermarket speakers in the front doors, and the mounting brackets needed for the smaller ones will be included with your Crutchfield speaker purchase.
Once you've installed your new component speakers, be sure to test them and make sure they're working. You'll also want to make sure the door locks and windows are working properly before you put the doors back together.
Tools needed: Panel tool, Phillips screwdriver
New rear speakers will really fill out your car's sound (Crutchfield Research Photo)
Replacing the rear door speakers
The rear door speakers are pretty easy to deal with, too. You'll start by prying off the screw cover behind the door release and remove one exposed Phillips screw. Then, pry off the door pull cover and remove two exposed Phillips screws. Pry around the sides and bottom of the door panel to release seven retaining clips, then disconnect the door lock and release cables, disconnect the wiring harnesses, and remove the door panels.
Once you remove the four Phillips screws securing the factory speaker, you can pull it out, disconnect it, and replace it with your choice of 6"x8" or 5-1/4" aftermarket models. The speaker mounting bracket required for the smaller ones will be included with your Crutchfield speaker purchase.
Once you've test the speakers, locks, and windows, you're ready to reinstall the door panels.
Tools needed: Panel tool, Phillips screwdriver
Getting to the hatchback's Bose rear pillar speakers involves a fair amount of work (Crutchfield Research Photo)
Replacing the hatchback's rear pillar speakers
Your Bose-equipped hatchback's rear pillar speakers aren't exactly hard to remove and replace, but there are a few steps involved, so patience and organization will come in very handy here. You'll be removing a healthy number of screws, gaskets, panels, and pins, so it's important to keep track of what came from where as you're taking things apart. You'll be happy you did so when it's time to put it all back together, trust us.
All of the nitty-gritty details can be found in your Crutchfield MasterSheet, of course. And don't forget the Posi-Products speaker connectors you'll need to connect these speakers to the factory wiring.
Tools needed: Panel tool, Phillips screwdriver, small flat blade screwdriver
Removing and replacing the rear deck speakers is a truckload of work (Crutchfield Research Photo)
Replacing the sedan's rear deck speakers
You'll need to remove the entire rear deck to replace the Bose system's rear deck speakers, and that is not an easy job. The various tasks involved aren't that difficult, but there are a lot of them and there's a lot of disassembly involved.
It's a lengthy process, and we're going to avoid weighing this article down with a lengthy series of paragraphs. The step-by-step, illustrated disassembly instructions in your Crutchfield MasterSheet will make a lot more sense, anyway. Can you, the average DIY-er, do this? Yes, but it'll take time, patience, and organization.
Bose-equipped sedans also have a rear deck subwoofer (see below), and getting to that involves a lot of the same steps. As with the radio/center dash speaker system discussed earlier, this is a situation in which we'd recommend replacing everything at once. You'll be glad you did.
Tools needed: Panel tool, 8mm socket, ratchet and extension, needlenose pliers
The hatchback's Bose subwoofer sits in a spare tire-mounted enclosure (Crutchfield Research Photo)
Bass in your Mazda 3
If you want to add a subwoofer enclosure to your 3, you do have some room to work with. In the hatchback, you have a 40" W x 15" H x 30"/21" D space to work with, measured under the cargo cover. The sedan offers a 41"W x 15" H x 36"/31" D space, measured under the trunk's cross brace. It's not acres of room, but both models give you some room to add boom
If you're not a total bass-head and you want to save some room for cargo, you can opt for a more compact powered subwoofer.
The hatchback's 6-3/4" Bose subwoofer can be found under the cargo floor panel. It's not hard to reach and remove, but you will need to drill new mounting screw holes for the replacement sub. This isn't hard to do, but work carefully, know what's around and below the area you're drilling into, and wear eye protection.
We've already established that the sedan's Bose sub is not the easiest thing in the world to replace, so you won't be stunned to learn that there are a couple of other things to keep in mind. Nothing awful, though. You'll need to fabricate a speaker mounting bracket or spacer for the new sub, and you'll also need to use Posi-Products speaker connectors to connect the new sub to the factory wiring.
Tools needed (Hatchback): 1/4" socket, ratchet and extension, small flat blade screwdriver (used to disconnect harness), drill and 1/8" bit
Tools needed (Sedan): Panel tool, 8mm socket, ratchet and extension, needlenose pliers
Other options for your Mazda 3
Here are some other cool ideas for your Mazda
Add an amp (or two)
A new 4-channel amplifier will help you get the most out of your new speakers. You'll get cleaner power (and a lot more of it), which will result in much, much better sound. A mono amp can provide the juice you need for your new subwoofer, too.
Don't want to replace the stock radio? You can add a Dock-and-Play satellite radio that you can take from car to car. Getting a new stereo? Look for an aftermarket model that’ll work with an outboard SiriusXM tuner.
Protect your car with a security system
Installing a security system in your Mazda 3 isn't easy (security systems rarely are), but it's definitely a good idea. Our Crutchfield Advisors can help figure out what you need to get the job done, but we usually recommend taking your car and new gear to a professional installer.
Find the audio gear that fits your car or truck
Visit our Outfit My Car page and enter your vehicle information to see stereos, speakers, subs, and other audio accessories that will work in your vehicle.