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18+ Technic McLaren P1 Building Set - 42172, vendor video thumbnail

18+ Technic McLaren P1 Building Set - 42172

LEGO®

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Details & care

This McLaren P1 building set for adults is packed with authentic details and can be built to make a 1:8 scale model collectible for supercar fans. Build the V8 piston engine and more. Enjoy a mindful project assembling all the details like the seven-speed gearbox with shifter drum, opening doors, adjustable rear wing and V8 piston engine. From the unboxing experience to the building project, this adult building kit delivers a rewarding challenge for LEGO Technic fans.

Additional features: Like the real-world race car, the LEGO Technic version features its own unique serial number, giving you access to exclusive online content. This set makes a great gift for adult LEGO builders, supercar enthusiasts and McLaren fans, offering a creative project and a display piece to cherish.

Includes: Car, engine and unique serial-number card.

Sizing information: 3,893 pieces; 19.59 lb.; 20.5" x 14.8" x 9" box; approximately 5.5" (14cm) x 23" (59cm) x 9.5" (25cm) assembled kit.

  • Warning: Choking hazard. Small parts. Not for children under 3 years
  • Ages 18 and up
  • Plastic
  • Spot clean
  • Imported
  • Item #10973160

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LEGO®

Founded in 1932 by Ole Kirk Christiansen, Denmark-based LEGO® is one of the world's leading manufacturers of play materials. Its iconic interlocking bricks, minifigures, play sets and more have been beloved by children of all ages for generations. LEGO is committed to the development of children and aims to inspire the builders of tomorrow through creative play and learning.

Reviews

(127)
4.8 out of 5
Write a Review

Most helpful positive review

Apr 22, 2026
Excellent model
A very interesting and involving build. I really enjoyed building all of the gearbox and engine components with all of the separate gears and gear change mechanism . I was particularly impressed by the door opening system, which holds the door quite easily in the open position, but is no effort to close again .
DuchessGrandMop100
Reposted from LEGO

Most helpful critical review

Jan 28, 2026
Missing Pieces
Not even through step 1 and pieces are missing… very frustrating for the cost of this set.
Primateman
Reposted from LEGO
5 stars
87%
4 stars
8%
3 stars
2%
2 stars
2%
1 star
1%
Sort by Most Helpful
DuchessGrandMop100
Reposted from LEGO
Apr 22, 2026
Excellent model
A very interesting and involving build. I really enjoyed building all of the gearbox and engine components with all of the separate gears and gear change mechanism . I was particularly impressed by the door opening system, which holds the door quite easily in the open position, but is no effort to close again .
stephen
Reposted from LEGO
Apr 7, 2026
Awesome
very cool experience. Love the final looks and all the details it has
Lego-fan-Philly
Reposted from LEGO
Apr 4, 2026
Masterpiece
This Lego set is a joy to build and an absolute masterpiece of creativity. It’s expensive, but without a doubt the best Lego set I’ve ever built. My only regret… I fear no other set I buy in future will compare.
Nino Goodfella
Reposted from LEGO
Feb 20, 2026
Simply amazing
In my opinion, this is a must add to your collection. From the presentation, to the details about the actual car. The build not complicated at all. No missing pcs, and everything lined up perfect when put together. Including the details to registering the product and obtaining the cool free back drops.
BobF
Reposted from LEGO
Verified purchase
Feb 19, 2026
Fun build
This was one of the most fun build builds I've ever done. I love technic sets. It was complicated enough to make it interesting. The finished car looks great. The packaging was really special. There are no decals.
Primateman
Reposted from LEGO
Jan 28, 2026
Missing Pieces
Not even through step 1 and pieces are missing… very frustrating for the cost of this set.
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