# LEGO 42123-1 — McLaren Senna GTR (2021)

Source: https://www.brickmissing.com/sets/42123-1-mclaren-senna-gtr
Publisher: BrickMissing (https://www.brickmissing.com) — free LEGO parts checker. Not affiliated with the LEGO Group.

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.

## Set facts

- Set number: 42123-1
- Name: McLaren Senna GTR
- Theme: Technic › Licensed
- Released: 2021
- Pieces: 830
- Distinct part + colour lots: 131
- Build difficulty: intermediate
- Repairability: 3.8% of this set's lots are hard to replace (5 of 131 part+colour combinations appear in three or fewer sets in the entire LEGO catalog).

## Complete parts list (131 lots, 830 pieces)

Prices are the official LEGO Pick a Brick price per individual part, where LEGO publishes one.

| Qty | Part | Colour | Part no. | LEGO element ID | LEGO price each |
| ---: | --- | --- | --- | --- | --- |
| 2 | Technic Pin Connector Hub with 2 Perpendicular Axles | Black | 10197 | 6099801 | €0,18 |
| 1 | Slope Curved 4 x 1 No Studs [Stud Holder with Symmetric Ridges] | Black | 11153 | 6037746 | €0,12 |
| 20 | Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle | Dark Bluish Gray | 11214 | 6015356 | €0,29 |
| 6 | Slope Curved 2 x 1 No Studs [1/2 Bow] | Black | 11477 | 6047276 | €0,06 |
| 2 | Slope Curved 2 x 1 No Studs [1/2 Bow] | Light Bluish Gray | 11477 | 6028813 | €0,06 |
| 1 | Technic Panel Fairing #21 5L Small Smooth, Side B | Light Bluish Gray | 11946 | 6524693 | €0,38 |
| 9 | Technic Panel Fairing #21 5L Small Smooth, Side B | Black | 11946 | 6316923 | €0,38 |
| 2 | Technic Panel Fairing #21 5L Small Smooth, Side B | Black | 11946 | 6352643 | €0,38 |
| 2 | Technic Panel Fairing #22 5L Small Smooth, Side A | Black | 11947 | 6352661 | €0,38 |
| 9 | Technic Panel Fairing #22 5L Small Smooth, Side A | Black | 11947 | 6319983 | €0,38 |
| 1 | Technic Panel Fairing #22 5L Small Smooth, Side A | Light Bluish Gray | 11947 | 6524692 | €0,38 |
| 2 | Technic Axle 5 with Stop | Reddish Brown | 15462 | 6159763 | €0,11 |
| 14 | Technic Pin Connector Round 1L [Beam] | Black | 18654 | 6121485 | €0,05 |
| 3 | Technic Pin Connector Round 1L [Beam] | Light Bluish Gray | 18654 | 6183784 | €0,05 |
| 3 | Plate Special 1 x 2 with Pin Hole Underneath | Black | 18677 | 6192309 | €0,07 |
| 2 | Technic Panel Curved 3 x 13 | Black | 18944 | 6208345 | €1,20 |
| 2 | Technic Panel Curved and Bent 6 x 3 | Dark Bluish Gray | 24116 | 6133243 | — |
| 13 | Technic Axle 3 with Stop | Reddish Brown | 24316 | 6135494 | €0,07 |
| 2 | Tile 2 x 3 | Black | 26603 | 6162892 | €0,11 |
| 146 | Technic Pin with Friction Ridges Lengthwise and Center Slots | Black | 2780 | 278026 | — |
| 4 | Technic Pin Connector Hub with 2 Axles | Black | 27940 | 6336378 | €0,17 |
| 1 | Technic Steering Wheel Small (3 Studs Diameter) | Black | 2819 | 4580509 | €0,34 |
| 2 | Plate 1 x 1 | Trans-Clear | 3024 | 6513962 | €0,06 |
| 2 | Plate 1 x 1 | Light Bluish Gray | 3024 | 4211399 | €0,06 |
| 6 | Plate 1 x 1 | Black | 3024 | 302426 | €0,06 |
| 1 | Plate 2 x 8 | Black | 3034 | 303426 | €0,29 |
| 2 | Bar 4L (Lightsaber Blade / Wand) | Trans-Red | 30374 | 6507880 | €0,08 |
| 2 | Bar 4L (Lightsaber Blade / Wand) | White | 30374 | 6116602 | €0,05 |
| 2 | Tyre 43.2 x 14 | Black | 30699 | 6518575 | €1,96 |
| 1 | Tile 1 x 1 with Groove | Black | 3070b | 307026 | €0,05 |
| 2 | Technic Pin 3/4 | Tan | 32002 | 6013938 | €0,08 |
| 2 | Technic Axle and Pin Connector Angled #1 | Black | 32013 | 6332570 | €0,08 |
| 5 | Technic Axle and Pin Connector Angled #1 | Light Bluish Gray | 32013 | 6296859 | €0,08 |
| 4 | Technic Axle and Pin Connector Angled #1 | Black | 32013 | 6284699 | €0,08 |
| 2 | Technic Axle and Pin Connector Angled #6 - 90° | Black | 32014 | 6268905 | €0,22 |
| 8 | Technic Axle and Pin Connector Angled #5 - 112.5° | Black | 32015 | 6331024 | €0,21 |
| 6 | Technic Axle and Pin Connector Angled #2 - 180° | Red | 32034 | 6351572 | €0,11 |
| 4 | Technic Axle Connector with Axle Hole | Black | 32039 | 3203923 | — |
| 7 | Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] | Light Bluish Gray | 32054 | 4211865 | — |
| 2 | Technic Axle 2 Notched | Black | 32062 | 4109810 | €0,07 |
| 22 | Technic Axle 2 Notched | Red | 32062 | 4142865 | €0,07 |
| 4 | Technic Beam 1 x 6 Thin | Black | 32063 | 6163980 | €0,13 |
| 2 | Technic Beam 1 x 6 Thin | Light Bluish Gray | 32063 | 6170293 | €0,13 |
| 1 | Technic Beam 1 x 7 Thin | White | 32065 | 4205157 | — |
| 5 | Technic Axle 5 | Light Bluish Gray | 32073 | 4211639 | €0,11 |
| 10 | Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced | Light Bluish Gray | 32123b | 6271165 | €0,04 |
| 8 | Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced | Yellow | 32123b | 6271167 | €0,04 |
| 2 | Technic Beam 2 x 4 L-Shape Thick | Light Bluish Gray | 32140 | 6271831 | €0,15 |
| 16 | Technic Beam 2 x 4 L-Shape Thick | Black | 32140 | 6271825 | €0,15 |
| 3 | Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole | Light Bluish Gray | 32184 | 6276969 | €0,12 |
| 2 | Technic Axle and Pin Connector Angled #4 - 135° | Light Bluish Gray | 32192 | 6262905 | €0,19 |
| 3 | Axle Hose, Soft 11L | Black | 32199 | 3219923 | — |
| 2 | Axle Hose, Soft 16L | Black | 32202 | 6057525 | €0,92 |
| 2 | Technic Gear 12 Tooth Double Bevel | Black | 32270 | 4177431 | €0,18 |
| 1 | Technic Beam 1 x 15 Thick | Black | 32278 | 4542573 | €0,42 |
| 2 | Technic Beam 1 x 15 Thick | Black | 32278 | 6057799 | €0,42 |
| 4 | Technic Axle and Pin Connector Perpendicular Double | Light Bluish Gray | 32291 | 6280396 | €0,15 |
| 16 | Technic Beam 1 x 5 Thick | Black | 32316 | 4142135 | €0,19 |
| 2 | Technic Beam 1 x 3 Thick | Dark Bluish Gray | 32523 | 4210751 | €0,10 |
| 2 | Technic Beam 1 x 3 Thick | Light Bluish Gray | 32523 | 4211655 | €0,10 |
| 11 | Technic Beam 1 x 3 Thick | Black | 32523 | 4142822 | €0,10 |
| 5 | Technic Beam 1 x 7 Thick | Black | 32524 | 4495935 | €0,25 |
| 4 | Technic Beam 1 x 7 Thick | Light Bluish Gray | 32524 | 4495930 | €0,25 |
| 2 | Technic Beam 1 x 7 Thick | Black | 32524 | 4506043 | €0,25 |
| 10 | Technic Beam 3 x 5 L-Shape Thick | Black | 32526 | 4142823 | €0,24 |
| 4 | Technic Beam 3 x 5 L-Shape Thick | Black | 32526 | 4158923 | €0,24 |
| 4 | Technic Pin Connector Perpendicular Long | Light Bluish Gray | 32557 | 4211714 | €0,22 |
| 5 | Technic Pin Connector Perpendicular Long | Black | 32557 | 4143466 | €0,22 |
| 2 | Plate 1 x 8 | Black | 3460 | 346026 | €0,18 |
| 1 | Plate 1 x 6 | Light Bluish Gray | 3666 | 4211438 | €0,17 |
| 6 | Technic Pin without Friction Ridges Lengthwise | Light Bluish Gray | 3673 | 4211807 | €0,05 |
| 2 | Technic Axle 4 | Red | 3705 | 6129995 | €0,08 |
| 6 | Technic Axle 6 | Black | 3706 | 370626 | €0,12 |
| 2 | Plate 1 x 4 | Black | 3710 | 371026 | €0,12 |
| 13 | Technic Bush | Light Bluish Gray | 3713 | 6275844 | €0,05 |
| 2 | Technic Pin Long without Friction Ridges, with Anti-Roll Notch | Tan | 39888 | 6321305 | €0,08 |
| 5 | Technic Beam 1 x 9 Thick | Dark Bluish Gray | 40490 | 4645730 | €0,29 |
| 12 | Technic Beam 1 x 13 Thick | Black | 41239 | 4522933 | €0,39 |
| 12 | Technic Beam 1 x 2 Thin | Black | 41677 | 6338428 | €0,13 |
| 6 | Technic Axle and Pin Connector Perpendicular Double Split | Black | 41678 | 4162857 | — |
| 19 | Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes | Black | 42003 | 6273708 | €0,12 |
| 2 | Technic Driving Ring Connector Smooth [2 rounded and 2 flat side walls] | Black | 42195 | 6286381 | €0,13 |
| 1 | Technic Panel Car Mudguard Arched 9 x 2 x 3 with Light Bluish Grey/Black Decorations print | Black | 42531pr0001 | 6335197 | — |
| 1 | Technic Panel Car Mudguard Arched 9 x 2 x 3 with Light Bluish Grey/Black Decorations print | Black | 42531pr0002 | 6335198 | — |
| 30 | Technic Pin 1/2 | Black | 4274 | 4143005 | €0,05 |
| 68 | Technic Pin Long with Friction Ridges Lengthwise, 1 Center Slot | Black | 42924 | 6299413 | €0,10 |
| 17 | Technic Axle Pin with Friction Ridges Lengthwise | Black | 43093 | 4206482 | €0,06 |
| 12 | Technic Beam 1 x 2 Thick | Black | 43857 | 4177444 | €0,12 |
| 5 | Technic Axle 7 | Yellow | 44294 | 6130009 | €0,16 |
| 2 | Tyre 43.2 x 22 ZR | Black | 44309 | 4184286 | €1,68 |
| 4 | Technic Pin Connector Perpendicular 2 x 2 Bent | Light Bluish Gray | 44809 | 4211880 | €0,36 |
| 3 | Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Small Squared Pin Holes] | Light Bluish Gray | 44874 | 6321303 | €0,18 |
| 2 | Technic Pin Connector Hub with 2 Pins with Friction Ridges Lengthwise [Small Squared Pin Holes] | Black | 44874 | 6366229 | €0,18 |
| 6 | Technic Axle 3 | Yellow | 4519 | 6130007 | €0,05 |
| 2 | Technic Tooth 1 x 3 with Axle Hole [Hollow Underside] | Black | 48267 | 6336385 | — |
| 8 | Panel 1 x 2 x 1 [Rounded Corners] | Black | 4865b | 6146220 | €0,10 |
| 4 | Slope 30° 1 x 1 x 2/3 (Cheese Slope) | Trans-Clear | 54200 | 6245250 | €0,08 |
| 1 | Technic Axle 8 with Stop | Dark Bluish Gray | 55013 | 4499858 | €0,21 |
| 2 | Wheel 30.4 x 20 without Pinholes, with Reinforced Rim | Black | 56145 | 4299389 | €0,50 |
| 2 | Wheel 30 x 14 | Black | 56904 | 6251174 | €0,54 |
| 4 | Technic Axle Connector Smooth [with x Hole + Orientation] | Dark Bluish Gray | 59443 | 4516546 | €0,06 |
| 7 | Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole | Dark Bluish Gray | 60483 | 6265093 | €0,07 |
| 1 | Technic Beam 3 x 3 T-Shape Thick | Black | 60484 | 4552347 | €0,18 |
| 3 | Technic Axle 9 | Light Bluish Gray | 60485 | 4535768 | €0,21 |
| 2 | Technic Pin Connector Round [Slotted] | Light Bluish Gray | 62462 | 6173127 | €0,06 |
| 2 | Technic Axle and Pin Connector Perpendicular Triple | Light Bluish Gray | 63869 | 6331441 | €0,17 |
| 3 | Technic Axle and Pin Connector Perpendicular Triple | Black | 63869 | 6362991 | €0,17 |
| 1 | Technic Panel Fairing #6 Long Smooth, Side B | Black | 64393 | 6330920 | — |
| 1 | Technic Panel Fairing #5 Long Smooth, Side A | Black | 64681 | 6330921 | — |
| 19 | Technic Axle and Pin Connector Perpendicular | Black | 6536 | 6261371 | €0,10 |
| 2 | Technic Brick 1 x 1 with Pin Hole | Black | 6541 | 654126 | €0,07 |
| 2 | Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Square Holes] | Black | 65487 | 6282145 | €0,11 |
| 27 | Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise [Square Holes] | Black | 65487 | 6282140 | €0,11 |
| 2 | Technic Pin Connector Hub Perpendicular 3L with 4 Pins (Squared Holes) | Light Bluish Gray | 65489 | 6282158 | €0,22 |
| 2 | Technic Pin Connector Toggle Joint Smooth Double with 2 Pins [Square Holes] | Black | 65746 | 6328175 | €0,45 |
| 2 | Technic Axle 3 with Stud | Dark Tan | 6587 | 6031821 | €0,10 |
| 4 | Technic Gear 12 Tooth Bevel | Tan | 6589 | 4565452 | €0,10 |
| 4 | Technic Beam 1 x 3 Thin | Black | 6632 | 6331723 | €0,25 |
| 2 | Technic Beam 1 x 3 Thin | Red | 6632 | 6364451 | €0,25 |
| 2 | Tile 1 x 6 with Groove | Black | 6636 | 663626 | €0,13 |
| 2 | Technic Panel Fairing 2 x 3 x 1 | Black | 71682 | 6331026 | €0,47 |
| 2 | Technic Panel Fairing 2 x 3 x 1 | Black | 71682 | 6331025 | €0,47 |
| 1 | Sticker Sheet for Set 42123-1 | Unknown | 72203 | 6323435 | — |
| 1 | Hose Rigid 3mm D. 9L / 7.2cm | Black | 75c09 | 6409912 | €0,76 |
| 1 | Technic Panel Fairing #1 Small Smooth Short, Side A | Black | 87080 | 4566266 | — |
| 1 | Technic Panel Fairing #1 Small Smooth Short, Side A | Black | 87080 | 4566251 | €0,48 |
| 5 | Technic Axle 4 with Stop | Dark Bluish Gray | 87083 | 6083620 | €0,07 |
| 1 | Technic Panel Fairing #2 Small Smooth Short, Side B | Black | 87086 | 4566265 | — |
| 1 | Technic Panel Fairing #2 Small Smooth Short, Side B | Black | 87086 | 4566249 | €0,48 |
| 1 | Technic Gear Rack 1 x 7 with Axle and Pin Holes | Black | 87761 | 6327430 | €0,82 |
| 1 | Slope Brick Curved 2 x 4 x 2/3 No Studs, with Bottom Tubes | Light Bluish Gray | 88930 | 4597901 | €0,19 |

## Notes

- Track which of these parts you own and see what is missing: https://www.brickmissing.com/sets/42123-1-mclaren-senna-gtr
- Inventory data is based on official LEGO inventories via the Rebrickable catalog, updated daily.
- Part images, minifigure lists and related sets are on the set page: https://www.brickmissing.com/sets/42123-1-mclaren-senna-gtr