Technic

Ford Mustang Shelby GT500

A cheerful little pull-back racer that never quite decides who it's for.

Brick Rated Score

3.4/5

Set 42138 · 2022

Pieces544

Minifigsn/a

Year2022

Set number42138

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The verdict

I have a soft spot for this Mustang, I really do, but I have to be straight with you about what it actually is.

Underneath the black-and-red bodywork it's a pull-back toy, two little wind-up motors and a launch lever, dressed up in Technic beams. As a fast, satisfying couple of hours it delivers, and the finished shape looks great on a shelf once you snap the rear cover on. Just don't expect steering, a gearbox, or any of the mechanical cleverness the bigger Technic cars are famous for.

Best for: younger builders who want a quick, rewarding first Technic car they can actually zoom across the floor

The full review

What it is

The first thing I did with this Mustang was wind it up and let it rip across my kitchen floor, and honestly that told me everything about what it is. This is a 544-piece Technic car built around two pull-back motors, one on each rear wheel, with a ratchet mechanism and a launch lever so you can hold it, aim it, and let it go when you're ready. The bodywork is that classic Shelby black with the twin red racing stripes, and when you clip on the closed rear cover it genuinely looks the part sitting on a shelf. For something this size and price, the shaping is more convincing than I expected.

The catch

Now the caveats, because there are a few and they matter. As a Technic set this is unusually light on function. There's no steering, the doors don't open, and while the hood lifts there's barely an engine underneath to look at. The cockpit is sparse. It's a pull-back racer at heart, which is a lovely thing, but it does leave you wondering who exactly LEGO aimed it at, since the box says nine and up and plenty of nine-year-olds have moved past pull-back toys. The accuracy isn't perfect either. Look at it from the side and the fender curving into the rear bumper almost whispers Porsche, and the front grille is a bit strange compared to the real car. A good chunk of the detailing comes from stickers too, so if you dislike applying decals you'll feel it here.

Who it's for

So here's how I'd call it. If you're a younger builder, or buying for one, and you want a first Technic car that comes together quickly and actually does something fun when it's finished, this is a genuinely good pick, especially at the discounts it's seen since retiring. If you're an experienced Technic fan chasing gearboxes, suspension, and mechanical wizardry, you'll blow through this in an afternoon and want more. It retired in December 2024, and interestingly it hasn't climbed in value, so buy it to build and play, not to tuck away as an investment.

The parts story

What the build is actually like, and the pieces worth knowing about.

Building this one is a breezy, low-stress experience, which is exactly its charm. The instructions run to 107 pages, and because so much of Technic is holes and pins that all look alike, the odd misplaced beam is the only thing likely to trip you up, easily caught and fixed. Experienced builders will sail through in around two hours. Newer builders get a gentle, confidence-building introduction to how beams, pins and axles lock a chassis together, without the intimidation of a supercar-sized manual.

There isn't a headline new mold to get excited about here, this is more a case of familiar Technic parts doing honest work. The stars of the show are functional rather than collectible, chiefly the two pull-back motors and the ratchet assembly that ties them together into a controllable launch. The black panels and the wheels give you the muscle-car stance, and the red-striped stickers carry the livery. At an RRP of $49.99 for 544 pieces the part-count value is fair rather than remarkable, but you're really paying for the play feature, not a rare-parts haul.

Fun facts

01The car uses two pull-back motors, one geared to each rear wheel, with a ratchet between them and a lever so you can decide the exact moment it launches.
02It pairs with the LEGO Technic AR app, which lets you race the finished model on a virtual track through your phone.
03The model measures about 27 cm (10.5 inches) long, 12 cm wide and 8 cm high once complete.
04Released in January 2022 with a $49.99 RRP, it retired in December 2024 and has actually dipped slightly in value since, thanks to heavy discounting.