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 Crossover
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | driver side of rear cargo area, side-firing |
|---|---|
| Outer bounding box | Larger custom build documented fitting: 36"W x 24"H x 52"L in the cargo area (no source named for that build). Mazda's own 2017 CX-5 spec deck: liftgate (rear tailgate) opening 44.3"W x 30.7"H; width between the rear tire houses 41.3"; width at floor 57"; floor to roof 32.4"; cargo floor length not published. (Liftgate opening corrected 2026-10-02 from an unsourced ~41"W x 27"H.) |
| Known obstructions | None specifically documented — side-firing chosen to preserve storage space |
| Usable volume estimate | 2 ft³ |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x8" sealed, DIY custom |
|---|---|
| Box type | sealed |
| Location | cargo area |
| Subwoofers | 1x10" sealed, side-firing (Skar Audio) |
|---|---|
| Box type | sealed |
| Location | driver side of rear cargo area |
Sizes and depths below are what research turned up for this generation. Confirm against your own vehicle before cutting or ordering — trim levels vary.
| Factory speaker size | 6.5" |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | unconfirmed |
| Factory speaker size | 6.5" (same as front) |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | unconfirmed |
| Tweeter | n/a — tweeter is A-pillar mounted, front only |
| Factory amp / premium audio | Clean, consistent across nearly the whole span. Bose 10-speaker premium system confirmed on Grand Touring trim, consistent from 2017 through at least 2019-2020, matching Mazda's usual Grand-Touring-gates-Bose pattern. Real expansion at the top of this page's range: for 2024, the 2.5 S Carbon Edition trim also picked up Bose — a genuine widening beyond just Grand Touring by the end of this generation. Mazda's 2017 spec deck: Sport 4 speakers; Touring 6; the Bose 10-speaker system with Centerpoint2 and AudioPilot2 is standard on Grand Touring AND available on Touring through the Preferred Equipment Package, so Bose was not Grand-Touring-only in 2017. |
|---|---|
| Adding subs without a head-unit swap | Confirmed straightforward — the side-firing product avoids the head unit entirely |
| Head unit | No replacement needed |
Real cargo space: 30.9 ft3 behind rear seats, 59.6 ft3 seats folded, folded floor ~70"L, liftgate opening 44.3"W x 30.7"H (Mazda 2017 spec deck; corrected 2026-10-02 from ~41"W x 27"H). Skar Audio's side-firing 10" 1000W sealed fiberglass enclosure is purpose-built for the driver side of the rear cargo area, preserving storage space. Documented larger custom box: 36"W x 24"H x 52"L fit successfully in the cargo area.
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.