2006-2013 Lexus IS 250 / IS 350 Subwoofer Box Fitment

2006-2013 Lexus IS 250 / IS 350 2nd Gen — subwoofer box fitment

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

Where a box actually fits

These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.

Trunk Unconfirmed

Location	trunk
Outer bounding box	No independently measured trunk dimensions found. Zenclosures prints no outside dimensions for its two IS boxes (mounting depth 9.00" and 8.25"; 1.13 and 1.12 ft3 per chamber).
Known obstructions	None documented for this generation. Zenclosures notes room behind its box to mount amplifiers.

Door speaker fitment

Sizes and depths below are what research turned up for this generation. Confirm against your own vehicle before cutting or ordering — trim levels vary.

Front doors Unconfirmed

Factory speaker size	Lexus's IS material gives speaker counts (13 standard, 14 Mark Levinson), not sizes or positions
Adapter bracket needed	unconfirmed

Rear doors Unconfirmed

Factory speaker size	same gap as the front doors
Adapter bracket needed	unconfirmed

Factory audio integration

Factory amp / premium audio	Lexus, IS 250 / IS 350. Standard (2010 and 2013): Lexus Premium Audio System, six-disc in-dash CD changer, 194 watts (max.) total power, 13 speakers. Optional Mark Levinson Premium Surround Sound (2010, 2011 models, 2013): 300 watts, 14 speakers including a center speaker and a subwoofer, 7.1-channel architecture, 10 amplifier channels, offered with the DVD touch-screen navigation. 2006-2009, 2011 and 2012 standard systems were not read; subwoofer position and speaker sizes are not stated.
Adding subs without a head-unit swap	no IS-specific line-output or amplifier-integration information found

Factory amp / premium audio

Lexus, IS 250 / IS 350. Standard (2010 and 2013): Lexus Premium Audio System, six-disc in-dash CD changer, 194 watts (max.) total power, 13 speakers. Optional Mark Levinson Premium Surround Sound (2010, 2011 models, 2013): 300 watts, 14 speakers including a center speaker and a subwoofer, 7.1-channel architecture, 10 amplifier channels, offered with the DVD touch-screen navigation. 2006-2009, 2011 and 2012 standard systems were not read; subwoofer position and speaker sizes are not stated.

Adding subs without a head-unit swap

no IS-specific line-output or amplifier-integration information found

Known integration products

no line-output converter or amp interface found; two Zenclosures boxes are listed below

Mounting locations

Trunk Unconfirmed

trunk

Two sealed Zenclosures designs (1.13 ft3 and 1.12 ft3 per chamber, 9.00" and 8.25" mounting depth) fit the trunk. EPA's luggage figure for the sedan is 11 cu ft in every year read (2006, 2008, 2010-2013), a government luggage rating and not a Lexus figure or a box dimension. No Lexus trunk volume and no measured trunk dimensions were found. Measure your own trunk before cutting wood.

Builds and products found for this vehicle

Outside links. Some are commercial products, some are owner builds posted on forums — the label says which. We do not endorse any of them.

Zenclosures (sealed) off-the-shelf
2006-2013 Lexus IS350 & IS250 Subwoofer Box (SKU IS350250VER1). Zenclosures states fit 2006-2013 Lexus IS350 and IS250; the page does not mention the convertible or the IS F. No outside dimensions on the product page. Published volume: 1.13 ft3 per chamber (2 chambers for two subs, 1 for one sub). Mounting depth 9.00". Mounting hole 9 1/8" for 10" subs and 11 1/8" for 12" subs. Type: sealed. Location not stated; "There is room behind the box to mount amps". Options 1x10", 1x12", 2x8", 2x10", 2x12", 1x15" and a 13.00" sub.
Zenclosures (sealed) off-the-shelf
2006-2013 Lexus IS350 & IS250 Subwoofer Box w/recess face (SKU IS350250VER3; overview: "with Custom Recess Face (Ver. 3)"). Zenclosures states fit 2006-2013 Lexus IS350 and IS250; the page does not mention the convertible or the IS F. No outside dimensions on the product page. Published volume: 1.12 ft3 per chamber (page text reads "1.12ft^"). Mounting depth 8.25". Mounting hole 9 1/8" for 10" subs, 11 1/8" for 12" subs. Type: sealed. Options: one 12" sub, two 10" subs or two 12" subs.

Build it for this vehicle

Design a box for this vehicle — Enclosure volume, port tuning, and a see-through render.
Door speaker fitment — No measured door depth on file for this vehicle yet, so there is no fit check to run. The page says how to request one.
See the factory speaker locations — Factory speaker sizes, depths and locations we have researched for this vehicle.

Each link opens the tool with this vehicle already selected.

Before you cut anything

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.