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The LEGO Technic McLaren Senna GTR 42123 is an 830-piece model kit designed for ages 10 and up, featuring authentic supercar details like a working V8 engine with moving pistons and signature dihedral doors. This collectible set blends advanced engineering with stunning aesthetics, making it a perfect gift for car enthusiasts and LEGO fans eager to showcase a true racetrack icon.








| ASIN | B08G4293BD |
| Age Range Description | 10 year + |
| Best Sellers Rank | 60,569 in Toys & Games ( See Top 100 in Toys & Games ) 1,718 in Toy Building Sets |
| Brand Name | LEGO |
| Colour | Multicolor |
| Customer Reviews | 4.8 4.8 out of 5 stars (13,683) |
| Educational Objective | Creative Thinking, Divergent Thinking, Hand-Eye Coordination, Problem Solving Skills |
| Global Trade Identification Number | 05702016913330 |
| Included Components | LEGO Technic McLaren Senna GTR Toy Sports Car 42123 |
| Is Assembly Required | Yes |
| Item Dimensions | 7 x 38.2 x 26.2 centimetres |
| Item Type Name | Building set |
| Item Weight | 980 Grams |
| Manufacturer | LEGO |
| Manufacturer Part Number | 42123 |
| Manufacturer Warranty Description | If your new LEGO set is missing parts or has faulty partsLEGO System A/S will replace these parts free of charge through our Bricks & Pieces service. We strive to make this free replacement available in all countriesbut reserve the right to change the availability of the Bricks & Pieces service at any time without prior notice. |
| Material Type | Plastic |
| Maximum Age Recommendation | 1188 |
| Minimum Age Recommendation | 120 |
| Model Name | LEGO Technic McLaren Senna GTR Toy Sports Car 42123 |
| Model Number | 42123 |
| Model Year | 2021 |
| Number of Pieces | 830 |
| Power Source | Hand-operated |
| Size | Unique waist |
| Special Features | The LEGO® Technic model kit "McLaren Senna GTR |
| Sub Brand | McLaren |
| Subject Character | McLaren Senna |
| Target Audience | boy, girl |
| Theme | Robots & STEM |
| Toy Building Block Type | Interlocking Toy Building Block |
| Unit Count | 830.0 count |
A**A
great car once finished
great for lego and car fans! easy to build and great present
S**E
Tricky for age group but looks great made up
Great car, definitely needs to be 10+ lots of small fidley bits that need small fingers. Some adult help need for instructions but looks amazing when complete.
J**S
Complex enough to be a challenge, but a sensible time to build
I'd say this kit hits the sweet spot of a decent price, a complex enough kit to be interesting and a sensible amount of time to build. The beautiful technic car kits at north of £100-200 are magnificent pieces of work, but they are also a significant financial and time commitment. This one is a generation ahead of the £18 Speed Champions kits, but only costs twice as much, so you get much more for your money. There are some nice touches like steering and an animated V8 engine, but it doesn't extend to proper gearbox, differential and suspension like the top kits do. That said it's a great medium level kit and very good looking when complete and looks something roughly like 1/12 scale, so it doesn't take up as much shelf space as the really big car kits.
D**M
Excellent starter set for Lego Conversion Builds (MOCs)
Bought this Senna for a conversion MOC 65410 by Blaz, (left of the four), which can be found on the Internet. A tricky build into the V6 Sports Coupe (Generic), using only the parts within the set. A leisurely build, end product requires a bit more work for strengthening at the front, so you can play around and modify the MOC to suit. Great value, worth buying for spare parts alone at £30-35, original is £45. The other main photo is the conversion 67165 by Nemooz, it's the same size as the original Senna, but contains a lot of extra technic parts, costing more than the original by far, again well worth grabbing any spare Senna's.
A**R
Great build but pieces missing
I thought I'd try something new and start relatively easy. Enjoy it right up to the last 10 minutes when I found I had 2 pieces missing. I can guarantee they wasn't dropped or lost as I opened each packet into a plastic container. I feel really disappointed and now have to buy the 2 missing bits at a cost of £5.00 (best price I can find). With this problem I can't honestly give it 5 stars.
L**E
Great if you love a challenge.
Bought for Christmas for my son, first time ever building technics, always had normal Lego previous. Lots of small pieces to contend with, the book doesn’t really give clear concise instructions so a bit of guess work involved. Took a while to build, after making one or two mistakes, son got a bit frustrated first time round, but we got there in the end. Great once built though, looks great! 🙂👍🏻
A**R
Our son was delighted
Our son was delighted with this car.
M**A
Very good quality
I bought this for my boyfriend and he loved it so much, he said that the design was great and that the quality was very good. We assembled it together and it was very fun. We definitely recommend this for everyone!
は**な
かっこいい息子も大喜び
T**G
Il prodotto è molto utile per la manualità e lo stimolo delle cellule cerebrali. sviluppa pazienza e nello stesso tempo fa dimenticare oggetti inutili quali computer, tablet e cellulari. Il ritrovo della propria manualità, il gioco, il divertimento e la volontà di curiosare e usare le mani sono tutti punti a favore di questo prodotto, consiglierei di prenderlo a tutti. Io l'ho costruito con amore e pazienza e ora lo tengo esposto come una cosa di alto valore istruttivo. Sicuramente se siete appassionati di lego è un modellino che dovreste avere. Il prezzo era perfetto e il venditore è affidabile.
A**R
Kul
P**E
De grande qualité mon beau fils en était très content
R**U
It is more than I expected. The size of the car is good. It took me 9 hours to build it .But the detailing of the interior could have been better and there could have been shock absorbers (suspension) on the car
Trustpilot
4 days ago
3 weeks ago