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 | rear cargo area, factory sealed enclosure |
|---|---|
| Outer bounding box | factory sealed OEM unit, no aftermarket-facing raw dimension published |
| Known obstructions | NX450h+ (PHEV) battery footprint impact on this cavity not confirmed |
Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.
| Subwoofers | compact powered sub added alongside the base Pioneer system |
|---|---|
| Box type | aftermarket, cargo area |
| Location | rear cargo area |
| Subwoofers | Not researched yet (no larger commercial build confirmed; Mark Levinson tier's factory unit is trim-locked, not a universal upgrade part) |
|---|---|
| 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.
| Adapter bracket needed | unconfirmed |
|---|---|
| Tweeter | Not independently confirmed for this generation. our other confirmed Mark Levinson Lexus system (RX, same era) places its premium tweeter in the A-PILLAR (2cm/~0.79", 8 ohm) — plausible the NX 2nd Gen's 17-speaker Mark Levinson tier follows the same convention, but explicitly not confirmed for this specific vehicle. |
| Adapter bracket needed | unconfirmed |
|---|
| Factory amp / premium audio | Two real, confirmed tiers: 10-speaker Pioneer (standard) and 17-speaker Mark Levinson (upgrade) — Mark Levinson confirmed as 12 speakers front row + 4 rear + 1 cargo-mounted subwoofer per real sourcing. Reconfirms our existing finding that Mark Levinson is a genuine Lexus-exclusive partnership, not shared with other Harman-family brands. |
|---|---|
| Adding subs without a head-unit swap | Confirmed real owner report exists (installed a powered sub in a 2024 NX350h WITHOUT Mark Levinson, i.e. the base Pioneer system) — real evidence the base system can be supplemented without a head-unit swap. |
| Head unit | No replacement needed |
Entirely missing model until now — a real gap given Lexus's confirmed Mark Levinson exclusivity already established on other vehicles covered here. Real, precise factory spec confirmed via Go-Parts.com's dedicated diagnostic guide: two tiers exist — a 10-speaker Pioneer system (standard) and a 17-speaker Mark Levinson surround system (upgrade). **Real, important trim-locked-parts finding**: the two systems' subwoofer assemblies are explicitly NOT interchangeable — the Mark Levinson subwoofer is confirmed not a direct replacement for the Pioneer unit and will not work correctly if swapped in. Real PHEV note, genuinely unresolved: the NX450h+ (plug-in hybrid) is confirmed to offer Mark Levinson on F Sport trim per real owner forum discussion, but this generation's PHEV battery footprint/cargo impact was NOT independently confirmed — flag as not researched rather than assumed safe or excluded (our standard PHEV caution applies until verified case by case).
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.