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 Sedan
These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.
| Location | trunk, through existing opening |
|---|---|
| Outer bounding box | 8.75" mounting depth |
| Known obstructions | Hybrid Premium AWD and Hybrid Sport AWD trims drop trunk space from 13.5 ft3 to 9.4 ft3 — verify trim before assuming full capacity |
| Usable volume estimate | 0.95 ft³ |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | 1x8" sealed, 0.95 ft3 |
|---|---|
| Box type | sealed |
| Location | trunk — check trim for hybrid AWD cargo reduction first |
| Subwoofers | 1x15" sealed, 1.90 ft3 (single-sub max spec) |
|---|---|
| Box type | sealed |
| Location | trunk |
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 | Non-Bose: 6.5" in the upper section of the door, plus a separate 3.25" squawker in the lower section — real 2-way factory setup, no separate tweeter beyond the squawker. Bose-equipped trims use a genuinely different architecture instead: a 5.25" coaxial driver WITH an integrated 1" tweeter, per the 16-speaker Bose Performance Series spec — see tweeter field below. |
|---|---|
| Known obstructions | Bose-equipped trims may differ — not independently confirmed |
| Adapter bracket needed | unconfirmed |
| Tweeter | Real, genuinely conflicting sourcing on Bose-equipped trims, left unresolved rather than picked arbitrarily: some sources describe a 1" tweeter INTEGRATED into the 5.25" coaxial door driver itself; others describe it as SAIL-PANEL/A-pillar mounted instead. Non-Bose trims have no separate tweeter — their 'squawker' (3.25", lower door) is a midrange, not a tweeter. |
| Midrange | IN THE DOOR (lower section) — real, confirmed on non-Bose trims specifically, described as a 'squawker.' Not confirmed whether Bose-equipped trims retain this separate midrange or replace it with the coaxial unit. |
| Factory speaker size | 6.5" in the bottom of the door (same as front's upper driver, no squawker) |
|---|---|
| Known obstructions | None specifically documented |
| Adapter bracket needed | unconfirmed |
| Tweeter | n/a — no rear tweeter confirmed |
| Factory amp / premium audio | Bose available on equipped trims — genuine factory woofer part number confirmed (28150-6HE2A, 2014-2020 Q50) |
|---|---|
| Adding subs without a head-unit swap | Confirmed straightforward — trunk-based builds don't touch the head unit |
| Head unit | No replacement needed |
Real full spec: cutouts 11.125"(12")/9.125"(10")/7.125"(8")/14.125"(15"), 8.75" mounting depth, 0.95 ft3/chamber (or 1.90 ft3 if single-sub), sealed, 3/4" MDF. REAL TRIM-SPECIFIC CARGO REDUCTION worth flagging: most Q50 trims have 13.5 ft3 of trunk space, but Hybrid Premium AWD and Hybrid Sport AWD trims drop to just 9.4 ft3 — a genuinely significant real reduction from the hybrid battery/AWD hardware, worth checking before assuming uniform trunk capacity across trims.
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.