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•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.

Parts Inventory

🧱 830 parts

Part	Color	Qty
Technic Pin Connector Hub with 2 Perpendicular Axles 10197	Black	2×
Slope Curved 4 x 1 No Studs [Stud Holder with Symmetric Ridges] 11153	Black	1×
Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle 11214	Dark Bluish Gray	20×
Slope Curved 2 x 1 No Studs [1/2 Bow] 11477	Black	6×
Slope Curved 2 x 1 No Studs [1/2 Bow] 11477	Light Bluish Gray	2×
Technic Panel Fairing #21 5L Small Smooth, Side B 11946	Light Bluish Gray	1×
Technic Panel Fairing #21 5L Small Smooth, Side B 11946	Black	9×
Technic Panel Fairing #21 5L Small Smooth, Side B 11946	Black	2×
Technic Panel Fairing #22 5L Small Smooth, Side A 11947	Black	2×
Technic Panel Fairing #22 5L Small Smooth, Side A 11947	Black	9×

Showing 10 of 131 parts

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Technic Panel Fairing #21 5L Small Smooth, Side B	11946	Light Bluish Gray	1×
Technic Panel Fairing #21 5L Small Smooth, Side B	11946	Black	9×
Technic Panel Fairing #21 5L Small Smooth, Side B	11946	Black	2×
Technic Panel Fairing #22 5L Small Smooth, Side A	11947	Black	2×
Technic Panel Fairing #22 5L Small Smooth, Side A	11947	Black	9×
Technic Panel Fairing #22 5L Small Smooth, Side A	11947	Light Bluish Gray	1×
Technic Axle 5 with Stop	15462	Reddish Brown	2×
Technic Pin Connector Round 1L [Beam]	18654	Black	14×
Technic Pin Connector Round 1L [Beam]	18654	Light Bluish Gray	3×
Plate Special 1 x 2 with Pin Hole Underneath	18677	Black	3×
Technic Panel Curved 3 x 13	18944	Black	2×
Technic Panel Curved and Bent 6 x 3	24116	Dark Bluish Gray	2×
Technic Axle 3 with Stop	24316	Reddish Brown	13×
Tile 2 x 3	26603	Black	2×
Technic Pin with Friction Ridges Lengthwise and Center Slots	2780	Black	146×
Technic Pin Connector Hub with 2 Axles	27940	Black	4×
Technic Steering Wheel Small (3 Studs Diameter)	2819	Black	1×
Plate 1 x 1	3024	Trans-Clear	2×
Plate 1 x 1	3024	Light Bluish Gray	2×
Plate 1 x 1	3024	Black	6×
Plate 2 x 8	3034	Black	1×
Bar 4L (Lightsaber Blade / Wand)	30374	Trans-Red	2×
Bar 4L (Lightsaber Blade / Wand)	30374	White	2×
Tyre 43.2 x 14	30699	Black	2×
Tile 1 x 1 with Groove	3070b	Black	1×
Technic Pin 3/4	32002	Tan	2×
Technic Axle and Pin Connector Angled #1	32013	Black	2×
Technic Axle and Pin Connector Angled #1	32013	Light Bluish Gray	5×
Technic Axle and Pin Connector Angled #1	32013	Black	4×
Technic Axle and Pin Connector Angled #6 - 90°	32014	Black	2×
Technic Axle and Pin Connector Angled #5 - 112.5°	32015	Black	8×
Technic Axle and Pin Connector Angled #2 - 180°	32034	Red	6×
Technic Axle Connector with Axle Hole	32039	Black	4×
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]	32054	Light Bluish Gray	7×
Technic Axle 2 Notched	32062	Black	2×
Technic Axle 2 Notched	32062	Red	22×
Technic Beam 1 x 6 Thin	32063	Black	4×
Technic Beam 1 x 6 Thin	32063	Light Bluish Gray	2×
Technic Beam 1 x 7 Thin	32065	White	1×
Technic Axle 5	32073	Light Bluish Gray	5×
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced	32123b	Light Bluish Gray	10×
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced	32123b	Yellow	8×
Technic Beam 2 x 4 L-Shape Thick	32140	Light Bluish Gray	2×
Technic Beam 2 x 4 L-Shape Thick	32140	Black	16×
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole	32184	Light Bluish Gray	3×
Technic Axle and Pin Connector Angled #4 - 135°	32192	Light Bluish Gray	2×
Axle Hose, Soft 11L	32199	Black	3×
Axle Hose, Soft 16L	32202	Black	2×
Technic Gear 12 Tooth Double Bevel	32270	Black	2×
Technic Beam 1 x 15 Thick	32278	Black	1×
Technic Beam 1 x 15 Thick	32278	Black	2×
Technic Axle and Pin Connector Perpendicular Double	32291	Light Bluish Gray	4×
Technic Beam 1 x 5 Thick	32316	Black	16×
Technic Beam 1 x 3 Thick	32523	Dark Bluish Gray	2×
Technic Beam 1 x 3 Thick	32523	Light Bluish Gray	2×
Technic Beam 1 x 3 Thick	32523	Black	11×
Technic Beam 1 x 7 Thick	32524	Black	5×
Technic Beam 1 x 7 Thick	32524	Light Bluish Gray	4×
Technic Beam 1 x 7 Thick	32524	Black	2×
Technic Beam 3 x 5 L-Shape Thick	32526	Black	10×
Technic Beam 3 x 5 L-Shape Thick	32526	Black	4×
Technic Pin Connector Perpendicular Long	32557	Light Bluish Gray	4×
Technic Pin Connector Perpendicular Long	32557	Black	5×
Plate 1 x 8	3460	Black	2×
Plate 1 x 6	3666	Light Bluish Gray	1×
Technic Pin without Friction Ridges Lengthwise	3673	Light Bluish Gray	6×
Technic Axle 4	3705	Red	2×
Technic Axle 6	3706	Black	6×
Plate 1 x 4	3710	Black	2×
Technic Bush	3713	Light Bluish Gray	13×
Technic Pin Long without Friction Ridges, with Anti-Roll Notch	39888	Tan	2×
Technic Beam 1 x 9 Thick	40490	Dark Bluish Gray	5×
Technic Beam 1 x 13 Thick	41239	Black	12×
Technic Beam 1 x 2 Thin	41677	Black	12×
Technic Axle and Pin Connector Perpendicular Double Split	41678	Black	6×
Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes	42003	Black	19×
Technic Driving Ring Connector Smooth [2 rounded and 2 flat side walls]	42195	Black	2×
Technic Panel Car Mudguard Arched 9 x 2 x 3 with Light Bluish Grey/Black Decorations print	42531pr0001	Black	1×
Technic Panel Car Mudguard Arched 9 x 2 x 3 with Light Bluish Grey/Black Decorations print	42531pr0002	Black	1×
Technic Pin 1/2	4274	Black	30×
Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot	42924	Black	68×
Technic Axle Pin with Friction Ridges Lengthwise	43093	Black	17×
Technic Beam 1 x 2 Thick	43857	Black	12×
Technic Axle 7	44294	Yellow	5×
Tyre 43.2 x 22 ZR	44309	Black	2×
Technic Pin Connector Perpendicular 2 x 2 Bent	44809	Light Bluish Gray	4×
Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Small Squared Pin Holes]	44874	Light Bluish Gray	3×
Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Small Squared Pin Holes]	44874	Black	2×
Technic Axle 3	4519	Yellow	6×
Technic Tooth 1 x 3 with Axle Hole [Hollow Underside]	48267	Black	2×
Panel 1 x 2 x 1 [Rounded Corners]	4865b	Black	8×
Slope 30° 1 x 1 x 2/3 (Cheese Slope)	54200	Trans-Clear	4×
Technic Axle 8 with Stop	55013	Dark Bluish Gray	1×
Wheel 30.4 x 20 without Pinholes, with Reinforced Rim	56145	Black	2×
Wheel 30 x 14	56904	Black	2×
Technic Axle Connector Smooth [with x Hole + Orientation]	59443	Dark Bluish Gray	4×
Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole	60483	Dark Bluish Gray	7×
Technic Beam 3 x 3 T-Shape Thick	60484	Black	1×
Technic Axle 9	60485	Light Bluish Gray	3×
Technic Pin Connector Round [Slotted]	62462	Light Bluish Gray	2×
Technic Axle and Pin Connector Perpendicular Triple	63869	Light Bluish Gray	2×
Technic Axle and Pin Connector Perpendicular Triple	63869	Black	3×
Technic Panel Fairing #6 Long Smooth, Side B	64393	Black	1×
Technic Panel Fairing #5 Long Smooth, Side A	64681	Black	1×
Technic Axle and Pin Connector Perpendicular	6536	Black	19×
Technic Brick 1 x 1 with Pin Hole	6541	Black	2×
Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Square Holes]	65487	Black	2×
Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Square Holes]	65487	Black	27×
Technic Pin Connector Hub Perpendicular 3L with 4 Pins (Squared Holes)	65489	Light Bluish Gray	2×
Technic Pin Connector Toggle Joint Smooth Double with 2 Pins [Square Holes]	65746	Black	2×
Technic Axle 3 with Stud	6587	Dark Tan	2×
Technic Gear 12 Tooth Bevel	6589	Tan	4×
Technic Beam 1 x 3 Thin	6632	Black	4×
Technic Beam 1 x 3 Thin	6632	Red	2×
Tile 1 x 6 with Groove	6636	Black	2×
Technic Panel Fairing 2 x 3 x 1	71682	Black	2×
Technic Panel Fairing 2 x 3 x 1	71682	Black	2×
Sticker Sheet for Set 42123-1	72203	Unknown	1×
Hose Rigid 3mm D. 9L / 7.2cm	75c09	Black	1×
Technic Panel Fairing #1 Small Smooth Short, Side A	87080	Black	1×
Technic Panel Fairing #1 Small Smooth Short, Side A	87080	Black	1×
Technic Axle 4 with Stop	87083	Dark Bluish Gray	5×
Technic Panel Fairing #2 Small Smooth Short, Side B	87086	Black	1×
Technic Panel Fairing #2 Small Smooth Short, Side B	87086	Black	1×
Technic Gear Rack 1 x 7 with Axle and Pin Holes	87761	Black	1×
Slope Brick Curved 2 x 4 x 2/3 No Studs, with Bottom Tubes	88930	Light Bluish Gray	1×

Build DNA

Parts inventory insights for McLaren Senna GTR

830 pieces puts this build +29% against the average Technic set and +54% against the average 2021 release.

LEGOTECHNIC

Vs average Technic set

+29%+186 parts

This set830

Average set644

Average Technic set: 644 pieces across 449 other sets.

Vs average 2021 set

+54%+291 parts

This set830

Average set539

Average 2021 set: 539 pieces across 471 other sets.

Color profile

13different colors

Dominant color

Black

Black600x

72%

Light Bluish Gray96x

12%

Dark Bluish Gray46x

Red32x

Unique parts

8.1 pieces per unique type

102

Repeat factor

Average pieces per unique type.

Most used part

Technic Pin with Friction Ridges Lengthwise and Center Slots

146x

Results are based on official LEGO part inventories. Accuracy improves as you confirm set completeness.

This site is not affiliated with or endorsed by the LEGO Group.

Build Insights🧩102unique parts🎨13different colors📊63.8avg. parts per color🏆146×Technic Pin with Friction Ridges Lengthwise and Center Slots

🎨 All Technic sets 📅 All sets from 2021

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