What we researched for this specific generation: where an enclosure actually fits, what the factory speakers are, how the factory audio is wired, and which real builds and commercial products exist for it. Confidence badges say how well each figure is sourced — this is research, not manufacturer spec.
Body styles covered: 4-Door SUV
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | spare tire well (Bose trims) / front door resonance boxes (all trims, non-user-serviceable) |
|---|---|
| Outer bounding box | no aftermarket-facing dimension published; factory sub replaces the tire rack itself rather than fitting a separate defined box |
| Known obstructions | Bose trims: factory sub occupies the space the spare-tire rack would otherwise use |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | OEM-spec replacement in the factory spare-tire-well location |
|---|---|
| Box type | factory enclosure |
| Location | spare tire well, Bose trims only |
| Subwoofers | Not researched yet (no larger commercial aftermarket build confirmed) |
|---|---|
| Box type | unconfirmed |
| Location | unconfirmed |
Sizes and depths below are what research turned up for this generation. Confirm against your own vehicle before cutting or ordering — trim levels vary.
| Known obstructions | Base-trim front bass runs through dedicated resonance boxes ahead of the doors, not the visible door speaker — factor this into any front-stage upgrade plan |
|---|---|
| Adapter bracket needed | unconfirmed |
| Tweeter | SAIL-PANEL mounted (upper range handled by tweeters in the door sail panel, real confirmed) — non-Bose trims. Bose-equipped trims instead route the front tweeter role through a separate dash-center 1" tweeter (paired with a 3.5" midrange), same pattern already confirmed on the CX-5 entry, while a real, specific note found describes the Bose front woofer as UNDER THE DASH with the front tweeter IN THE DOOR — a genuinely split architecture worth double-checking in person before assuming one location for 'the front tweeter.' |
| Adapter bracket needed | unconfirmed |
|---|---|
| Tweeter | n/a — tweeter is sail-panel/dash mounted, front only |
| Factory amp / premium audio | Bose 12-speaker system confirmed (BassMatch, AudioPilot, Centerpoint, and SurroundStage technologies named specifically) — real, detailed manufacturer-sourced spec, one of the more thoroughly documented Mazda factory systems found. Adds a 3rd subwoofer (spare-tire well) plus 2 additional forward-facing rear speakers over the base system. |
|---|---|
| Adding subs without a head-unit swap | A real dedicated DIY thread exists ('Bose trunk sub replacement DIY') confirming the factory spare-tire sub can be worked with/replaced without a head-unit swap. |
| Head unit | No replacement needed |
Real, confirmed factory design, sourced from Bose's own vehicle marketing material: the CX-30's Bose upgrade adds a third subwoofer directly in the spare-tire well, physically replacing the metal rack the spare tire normally rests on — a genuine zero-added-intrusion factory approach, similar in spirit to our other 'zero visible impact' SUV finds (Nissan Rogue, Subaru Forester 4th Gen) but factory-installed rather than aftermarket. Real, distinctive front-stage design also confirmed: the base system already runs front-firing 'subwoofers' in resonance boxes ahead of the doors — the same front-loaded-bass architecture pattern this guide has also found on the related CX-50 and on Volvo's B&W systems, worth treating as a recurring cross-brand pattern rather than a one-off.
Outside links. Some are commercial products, some are owner builds posted on forums — the label says which. We do not endorse any of them.
Each link opens the tool with this vehicle already selected.
Measure your own vehicle. Trim levels, factory subwoofer options, and mid-generation changes all move these numbers, and a box cut to a researched figure that does not match your truck is wasted wood. Where a badge reads Unconfirmed, treat the value as a starting point for your own measurement, not as an answer.