How big is the trunk on a 2015 Lexus IS 350?
The trunk space of the 2015 Lexus IS 350 is about 13.3 cubic feet (376 liters) with the rear seats up. This is a typical size for a compact luxury sedan and should handle several suitcases and daily cargo with ease.
Official trunk capacity with seats up
The published cargo volume is the standard reference point for shoppers evaluating trunk space when the rear seats remain in their upright position.
- With rear seats up: 13.3 cubic feet (376 liters).
This figure reflects the trunk’s internal volume as measured by Lexus and is the most relevant number for everyday use when you’re not folding the back seats.
Folding rear seats and expanded cargo space
Impact of the 60/40-split rear seat
For versatility, the IS 350 uses a 60/40-split folding rear seat. Folding the seats expands the usable cargo area to accommodate larger items, though Lexus does not publish a single standardized capacity figure for the folded configuration across all markets.
- Rear seats folded: space increases significantly beyond 13.3 cu ft; exact volume varies by market and model year, but the cargo area becomes much more accommodating for longer or bulkier items.
In practice, folding the rear seats allows you to carry longer objects and larger boxes, making the trunk considerably more versatile for trips, shopping, or weekend projects.
Practical notes for owners and buyers
When planning cargo, consider item shapes and the potential need for a spare tire or subwoofer in the trunk. The 2015 IS 350 typically includes a compact spare, which occupies part of the trunk floor, and the cargo floor height can influence loading of taller objects.
Summary
The 2015 Lexus IS 350 provides 13.3 cubic feet (376 liters) of trunk space with the rear seats up, a reasonable amount for its class. The 60/40-split folding rear seats allow for much larger cargo when needed, though exact folded-volume figures vary by market and equipment. For precise measurements in your region, consult the official Lexus brochure or the owner's manual.
