MYJAQI 555 Hard-Bottom Dog Back Seat Extender

MYJAQI 555 is a hard-bottom back-seat extender and cover designed to give dogs a larger platform in the vehicle. The listing describes a PU leather surface, a foldable support board, a mesh window and storage pockets, with a claimed 400-pound support limit.

At a glance

Hard-bottom design is intended to extend the rear-seat platform and reduce the chance of a dog sliding into the footwell.
The listing claims the extender increases activity space by 40%.
Foldable support is described as allowing 1-2 family members to sit beside the cover when folded.
Integrated mesh window, storage pockets, and a dog safety belt are described in the feature text.

Price

$84.98Save 15%

Reference price: ~~$99.99~~

Price checked: Nov 12, 2026

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Pros and cons

Pros

A firm platform can provide more usable rear-seat area than a loose cover alone.
PU leather is described as waterproof and easy to wipe clean, which may help with muddy or sandy paw marks.
Mesh window and storage pockets add features for airflow, visibility and carrying small pet items.

Technical specifications

11 specifications

Identity
Brand	MYJAQI
Model	555

Materials and protection
Material listed	Polyurethane (PU Leather)
Listed protection level	Waterproof
Colour	Black

Fit and placement
Fit type	Universal Fit
Seat placement	Back Seat
Vehicle position	Rear

Dimensions and support
Cover dimensions	25" x 52"
Claimed support capacity	400 pounds
Parcel dimensions and weight	66 x 46 x 8 cm; 3.66 kg

What to know before buying

The listing says the cover measures 25" x 52" and fits most cars, SUVs and small trucks, but vehicle-specific fit is not confirmed. Compare the dimensions with the seat before buying.
The 400-pound support capacity and 40% space increase are listing claims, not independently verified measurements. The support claim should not be treated as a vehicle restraint or crash-safety rating.

Who is it for?

A good fit for

Dog owners seeking a firm, expanded platform across a vehicle's rear seat.
Buyers who want a wipe-clean back-seat cover with a mesh window and storage pockets.
People whose vehicle and seat dimensions can accommodate the listed 25" x 52" cover.

Less suited to

Buyers needing a confirmed fit for a specific vehicle without checking the dimensions.
Anyone seeking an independently substantiated crash-protection or restraint rating.

MYJAQI 555 Hard-Bottom Dog Back Seat Extender · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 1,989 ratings

5 stars77%77%
4 stars14%14%
3 stars4%4%
2 stars2%2%
1 star3%3%

Customer feedback is broadly positive about perceived quality, fit, stability, setup and cleaning, including reports of stability with pets weighing up to 150 pounds and easier cleanup of sandy footprints. That feedback is encouraging for everyday use, but it does not verify the listing's 400-pound support claim or confirm fit in every vehicle. Aggregate ratings are also mostly five-star, with a smaller spread across lower ratings, so experiences are not uniformly positive.

Positive themes

Customer feedback describes the cover as sturdy and easy to install.
Customers report easy cleanup, including sandy paw prints.
Feedback highlights satisfaction with fit and perceived quality.

Frequently asked questions

What are the listed dimensions?

The feature text lists the cover as 25" x 52". Check your vehicle's rear-seat dimensions because the stated fit is for most vehicles, not a guaranteed fit for every model.

How much weight does the extender claim to support?

The listing claims support for up to 400 pounds. This is a manufacturer claim and is not a crash-safety or restraint rating.

What materials and features are described?

The listed material is Polyurethane (PU Leather). Feature text also describes a hard-bottom foldable support, mesh window, storage pockets and a dog safety belt.