How many pieces does the LEGO McLaren Senna GTR (42123-1) have?

The LEGO McLaren Senna GTR set (42123-1) contains 830 pieces. It was released in 2021 as part of the LEGO Technic theme.

How can I find missing parts for LEGO set 42123-1?

On BrickMissing you can check which parts from the LEGO McLaren Senna GTR (42123-1) you already own. Add your LEGO collection and we'll show exactly which of the 830 pieces you're missing and which you already have.

Can I build the LEGO McLaren Senna GTR with parts I already have?

Use BrickMissing's free parts checker to find out. Add LEGO sets you own to your collection and we'll cross-reference all 830 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO McLaren Senna GTR from?

The LEGO McLaren Senna GTR (42123-1) belongs to the LEGO Technic theme. You can browse all Technic sets on BrickMissing to find more sets from this theme.

McLaren Senna GTR

42123-1 Technic 2021 830 parts 3.8% repair risk Intermediate

Build and display the iconic McLaren Senna GTR with this impressive LEGO® Technic™ 42123 model. This collectible recreation captures the essence of the original track-focused supercar, designed to set pulses racing. Discover authentic features including a detailed V8 engine with moving pistons, and the iconic dihedral doors that open just like on the real car. Admire the authentic graphics and colors. You can even steer using the functional wheel before proudly placing the model on display. This LEGO Technic set introduces builders to the universe of engineering through realistic movement and mechanisms, offering an approachable and realistic building experience.

42123-1

3D build progress

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Parts Inventory

🧱 830 parts

Part	Color	Qty	LEGO price each
Technic Pin Connector Hub with 2 Perpendicular Axles 10197	Black	2×	€0,18 View at LEGO → View
Slope Curved 4 x 1 No Studs [Stud Holder with Symmetric Ridges] 11153	Black	1×	€0,12 View at LEGO → View
Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle 11214	Dark Bluish Gray	20×	€0,29 View at LEGO → View
Slope Curved 2 x 1 No Studs [1/2 Bow] 11477	Black	6×	€0,06 View at LEGO → View
Slope Curved 2 x 1 No Studs [1/2 Bow] 11477	Light Bluish Gray	2×	€0,06 View at LEGO → View
Technic Panel Fairing #21 5L Small Smooth, Side B 11946	Light Bluish Gray	1×	€0,38 View at LEGO → View
Technic Panel Fairing #21 5L Small Smooth, Side B 11946	Black	9×	€0,38 View at LEGO → View
Technic Panel Fairing #21 5L Small Smooth, Side B 11946	Black	2×	€0,38 View at LEGO → View
Technic Panel Fairing #22 5L Small Smooth, Side A 11947	Black	2×	€0,38 View at LEGO → View
Technic Panel Fairing #22 5L Small Smooth, Side A 11947	Black	9×	€0,38 View at LEGO → View
Technic Panel Fairing #22 5L Small Smooth, Side A 11947	Light Bluish Gray	1×	€0,38 View at LEGO → View
Technic Axle 5 with Stop 15462	Reddish Brown	2×	€0,11 View at LEGO → View

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Repairability

Can you fix McLaren Senna GTR if a piece goes missing?

3.8%Low repair risk

easy to fixguard this box

5 of the 131 part+color combinations in this set appear in 3 or fewer sets ever made. Lose one of those and a replacement is very hard to find.

Theme average

6.5%

All sets

6.7%

Hardest to replace

Axle Hose, Soft 11L · Black · only this setTechnic Panel Car Mudguard Arched 9 x 2… · Black · only this setTechnic Panel Car Mudguard Arched 9 x 2… · Black · only this set

How we calculate this →