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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 | 100,766 in Toys & Games ( See Top 100 in Toys & Games ) 2,793 in Toy Building Sets |
| Brand Name | LEGO |
| Colour | Multicolor |
| Country Of Origin | Denmark |
| Customer Reviews | 4.8 out of 5 stars 13,688 Reviews |
| 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.
A**S
This set is a must have for both Lego and McLaren fans alike.
As a massive fan of both LEGO and trying to get into the Technic line and a big fan of McLaren, this set was an absolute must-have for my collection. I picked up this set up as a sort of practice trail run, for my goal to pick up some of the larger technic sets. The LEGO Technic McLaren Senna is a fantastic display piece while still being an enjoyable and engaging build. The design captures the sleek design of the real car very well, especially considering the scale of the set, compared to the much more expensive model cars. The blue and black colour scheme really stands out once completed. The build itself is fun and not overly complicated, making it suitable for both experienced LEGO builders and those newer to the Technic range. The moving pistons, realistic steering, and detailed engineering touches such as the doors being able to open add a lot to the build and display experience and make it feel much more than just a display model. One thing I particularly liked was the size of the finished car. It looks impressive on display without taking up too much space, which is ideal if you already have a growing LEGO collection like I do. As being Lego, there were not any missing parts, but actually extra parts, and the parcel arrived in perfect condition. Overall, this is an excellent Technic set and a brilliant tribute to an incredible car. Highly recommended for LEGO fans, car enthusiasts, or anyone looking for a rewarding build with a great final display piece.
M**N
Good quality kit
Very good quality kit from Lego,it was a pleasant build and the instructions were very well detailed I was impressed by the size and the quality Well worth the money and makes a good addition to any Lego collection
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! 🙂👍🏻
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.
S**Y
Another great Lego product.
Another great Lego Technic product. Between my son & I we have built a few different Lego Technic models - some smaller models and some larger. This model is in the middle of our model sizes. Lego Technic is great - hard enough to make it challenging, but easy enough for 10-11 yr old to follow. Nice model, good detail. I know Lego can seem expensive, but I must say that we get our moneys worth out of the enjoyment of building. The detail means it build takes longer - we normally stop and start at it so it can take 4-5 days to complete. If you have never built Lego Technic before, then this is a nice starter (although some smaller models are available). If you are experienced, well then you know what to expect. I enjoyed this model - detail and build was just as expected. Definitely recommend - especially if on special offer (which it frequently is).
C**N
Buenas compra
Juguete muy lúdico. El niño aprende a la vez que juega.
は**な
かっこいい
かっこいい息子も大喜び
A**R
Julpresent
Kul
P**E
Super beau
De grande qualité mon beau fils en était très content
R**U
It is more than I expected
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
2 days ago
1 day ago