The space under a Model Y's front seats is genuinely empty, and that makes an under-seat box the only accessory in this hub that adds capacity rather than organizing capacity you already had. It is also the only one with a real cost to someone else in the car.
Two things to check before you buy. First, rear foot room: a rear passenger normally slides their feet under the front seat, and a box stops them. If you regularly carry adults in the back, this is a bad purchase. Second, the vents: the Model Y has rear-facing air vents under the front seats that feed the rear footwells, and a box that sits over them restricts airflow to the back of the car.
Quick picks
| # | Product | Best for | Score | Price |
|---|---|---|---|---|
| 1 |  Yeslak under-seat storage box Real extra capacity, with a real cost in rear foot room. Decide which you need. | Best overall | 8.2 | |
| 2 |  Under-seat air vent covers A small, cheap fix for a real irritation. Choose an open grille, never a solid cover. | Buy this instead if the vents are the issue | 8.4 | |
| 3 |  BASENOR armrest hidden storage insert The piece of the BASENOR set you would buy on its own. | Better capacity per dollar | 8.6 |
Scores are our editorial assessment of fitment scope, published materials and coverage. They are not lab measurements and we have not tested these products.
1. Best overall
Yeslak under-seat storage box
A rigid shell with a lid that slides into the void beneath the front seats, listed per Model Y generation. It reduces rear-passenger foot room, and on some layouts it can foul the under-seat air vents — which is the thing to check before buying, not after.
Best for: Using the space under the front seats
Fits: Model Y (2020-2024) · Model Y Juniper (2025-2026)
What works
- The only accessory that uses a genuinely empty volume rather than subdividing an existing one
- Keeps items out of sight without filling the console
What does not
- Reduces rear-passenger foot room under the seat
- Can foul the under-seat air vents on some layouts, which is the thing to check before buying
Manufacturer specifications
- Slides into the void beneath the front seats
- Listed per Model Y generation
- Rigid shell with a lid
Specifications as published by the manufacturer. We have not independently tested this product.
Specification sources: Model Y interior organizer round-up
2. Buy this instead if the vents are the issue
Under-seat air vent covers
If what actually bothers you about the under-seat area is debris collecting in the vents, a grille cover is a few dollars and solves it without costing foot room. Fit the open-grille type, never a solid panel, because any cover restricts airflow.
Best for: Stopping debris falling into the rear footwell vents
Fits: Model Y (2020-2024) · Model Y Juniper (2025-2026) · Model 3 (2017-2023) · Model 3 Highland (2024-2026)
What works
- Those vents collect coins, crumbs and small toys, and clearing them is genuinely awkward
- No adhesive, so nothing is permanent
- One of the cheapest protective parts on the car
What does not
- Any cover restricts airflow to some degree — fit the open-grille type, not a solid panel
- Easy to dislodge when vacuuming
Manufacturer specifications
- Grille covers for the rear-facing vents beneath the front seats
- Clip or friction fit with no adhesive
- Listed across Model 3 and Model Y fitments
Specifications as published by the manufacturer. We have not independently tested this product.
Specification sources: TOPABYTE 3-piece center console accessory set, Model Y interior organizer round-up
What to put in it
- Things you want out of sight — a bag, a laptop, documents.
- Items you do not need while driving, since reaching under a seat at speed is not practical.
- Nothing heavy enough to become a projectile. An unlatched box under a seat is not restrained.
- Nothing temperature-sensitive — that area gets warm with the vents running.
The vent problem, specifically
These vents are also where coins, crumbs and small toys end up, and clearing them is genuinely awkward. If that is what has brought you to this page, you do not want a storage box — you want vent covers, which cost a fraction as much. Our guide to the under-seat vent covers the rattle and debris issues properly.
Our honest view
For most owners, the armrest divider is a better buy. It adds usable organization without taking anything away, and it is in a place you can reach. The under-seat box is the right purchase in one specific case: you use the back seats rarely, you need to stow something out of sight regularly, and the frunk is already full.
Questions people actually ask
Does an under-seat box block the rear air vents?
It can, depending on the design and your seat position. Check the published dimensions and the vent position before buying — restricted airflow to the rear footwells is a real comfort loss.
How much space does it actually add?
Enough for a laptop bag or a small holdall per side. It is useful rather than transformative.
Will it affect rear passengers?
Yes. It stops them sliding their feet under the front seat, which is noticeable on a longer journey.
Is it secure?
Not in a crash sense. These boxes are not restrained, so do not store anything heavy or hard in them.
Sources
- Model Y interior organizer round-up including under-seat storage
- TOPABYTE accessory set including vent-area parts
Specifications and fitment claims on this page come from the manufacturer and retailer pages listed above. We have not tested these products and do not claim to have.
Read next
Guides
Model Y Under-Seat Storage: Worth It?
What fits under a Model Y's front seats, what it costs rear passengers, and the vent issue to check.
Guides
Tesla Under-Seat Vent: Rattles and Debris
Diagnosing a noise from the under-seat vent area, retrieving objects safely, and preventing a repeat.
Interior Protection
Under-Seat Vent Covers for the Model Y and Model 3
Grille covers for the rear-facing under-seat vents, with the airflow caveat that matters.
Console Organizers
Best Console Organizer for the Model Y (2020-2024)
Console trays and inserts for the pre-refresh 2020-2024 Model Y console, where the range is narrowing.
Frunk & Trunk Storage
Under-Floor Storage Bins for the Model Y and Model 3
Bins for the sub-floor well — the largest unstructured volume in these cars, and the cheapest upgrade.