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 | cargo area behind the rear seat |
|---|---|
| Outer bounding box | No cargo dimensions in inches found for this generation. |
| Known obstructions | On 12-speaker cars Lexus puts "a compact, L-shaped subwoofer in the rear-luggage compartment" (2011 and 2013 releases); its position within the compartment is not stated. |
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 |
|---|
| Adapter bracket needed | unconfirmed |
|---|
| Factory amp / premium audio | Lexus, by option and year. 2011 RX 350 (release 2010-07-16): standard "a powerful nine-speaker system with a six-disc changer"; "A 12-speaker audio system comes with the optional Comfort Package"; optional "15-speaker Mark Levinson Surround Sound system" (7.1-channel, with "a 100-watt amplified subwoofer"). 2013 (releases 2012-08-17): Mark Levinson 15-speaker "330 watts at 0.1 percent THD"; the RX 450h page ties the 12-speaker system with its L-shaped subwoofer to the Navigation Package. 2014 (release 2013-09-27): standard "nine-speaker Lexus Premium Audio System"; "The Display Audio/Rear Backup Camera Package upgrades the audio system to 12 speakers."; Mark Levinson "330 total watts of power through a 15-speaker array". Conflict kept: which package carries the 12-speaker system changes by year (Comfort Package 2011, Navigation Package 2013, Display Audio/Rear Backup Camera Package 2014). Door and tweeter sizes not stated. 2010, 2012, 2015 pages not read. |
|---|---|
| Adding subs without a head-unit swap | the Mark Levinson system has its own amplified subwoofer and the 12-speaker system a luggage-compartment subwoofer; no Lexus integration information read. |
Lexus 2014 RX 350 release (2013-09-27): "with the 40/20/40 split rear seat in use, the RX 350 offers 40 cu. ft. of carrying space." and "Folding all sections of the rear seat doubles that." Lexus 2011 release (2010-07-16): the 40/20/40 seats "can slid fore and aft, recline, and fold down" with one-touch levers in the luggage compartment. No SAE or EPA label; the figure is prose, unlabelled, from Lexus's US newsroom. No cargo length, width, height or opening in inches. fueleconomy.gov gives no luggage figure for SUVs. No box made for a 2010-2015 RX was found from the box makers checked.
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.