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% catalog rarity 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

Showing the first 12 rows of the parts list (830 pieces in total). The full list loads automatically.

Color	Qty	LEGO price each
Black	2×	€0,18 View at LEGO → View
Black	1×	€0,12 View at LEGO → View
Dark Bluish Gray	20×	€0,29 View at LEGO → View
Black	6×	€0,06 View at LEGO → View
Light Bluish Gray	2×	€0,06 View at LEGO → View
Light Bluish Gray	1×	€0,38 View at LEGO → View
Black	9×	€0,38 View at LEGO → View
Blue	2×	€0,38 View at LEGO → View
Blue	2×	€0,38 View at LEGO → View
Black	9×	€0,38 View at LEGO → View
Light Bluish Gray	1×	€0,38 View at LEGO → View
Reddish Brown	2×	€0,11 View at LEGO → View

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Catalog rarity

How common are the parts in McLaren Senna GTR?

3.8%Low rarity

more commonless common

5 of 131 recorded part+color combinations appear in 3 or fewer sets in our catalog. This does not measure replacement availability or price.

Theme average

6.5%

All sets

6.7%

Least common in our catalog

Axle Hose, Soft 11L · Blue · only this set in our catalogTechnic Panel Car Mudguard Arched 9 x 2… · Blue · only this set in our catalogTechnic Panel Car Mudguard Arched 9 x 2… · Blue · only this set in our catalog

How we calculate this →