1. Introduction to the Lamborghini Sián FKP 37 Model
The LEGO Technic Lamborghini Sián FKP 37 (Model 42115) is a highly detailed 1:8 scale replica designed for adult builders and car enthusiasts. This intricate model captures the unmistakable power and looks of the original Lamborghini Sián FKP 37, featuring authentic details and functional elements.
The set contains 3,696 pieces, offering a challenging yet rewarding building experience. Once completed, the model measures over 5 inches (13 cm) high, 23 inches (60 cm) long, and 9 inches (25 cm) wide, making it an impressive display piece.

Figure 1.1: The completed LEGO Technic Lamborghini Sián FKP 37 model.
2. Product Features
This LEGO Technic model is engineered with a range of authentic features that mirror the real Lamborghini Sián FKP 37:
- Realistic Display: A 1:8 scale model with 3,696 pieces, offering a true-to-life representation.
- Authentic Replica Details: Features a V12 engine with moving pistons, functional steering, independent front and rear suspension, a deployable rear spoiler, and classic scissor opening doors.
- Lime Green Design: The model showcases the iconic lime green color scheme with striking golden rims and decorated elements.
- Collector's Edition: Includes a collector’s building instruction booklet, a decorative display plate, and a unique serial number for enthusiasts.
- Elegant Detailing: Superb attention to detail in the decorated elements ensures a realistic representation of the original super sports car.
Video 2.1: A 360-degree view of the LEGO Technic Lamborghini Sián FKP 37, highlighting its design from all angles.
3. Setup and Assembly
Assembling the LEGO Technic Lamborghini Sián FKP 37 is an immersive and detailed process. The set is divided into several numbered boxes, each corresponding to a specific stage of the build, ensuring a structured and manageable construction experience.
The comprehensive instruction booklet guides you through each step, from building the complex 8-speed sequential transmission and V12 engine with moving pistons, to the intricate chassis and bodywork. Pay close attention to the instructions, especially when dealing with the numerous small parts and complex gear mechanisms, to ensure proper functionality of the finished model.

Figure 3.1: A builder engaged in the assembly process of the Lamborghini Sián FKP 37.

Figure 3.2: An aerial view showcasing the intricate internal mechanisms during assembly.
Video 3.1: A detailed look at the assembly process and internal mechanisms of the LEGO Technic Lamborghini Sián FKP 37.
4. Operating Features
The LEGO Technic Lamborghini Sián FKP 37 is not just a static display model; it incorporates several functional elements that mimic the real super sports car:
- 8-Speed Sequential Transmission: Activated by a movable paddle gearshift located behind the steering wheel.
- V12 Engine: Features moving pistons that operate as the wheels turn, showcasing the internal mechanics.
- 4-Wheel Drive: The model is designed with a functional 4-wheel drive system.
- Scissor Opening Doors: The iconic scissor doors open upwards, revealing the detailed interior.
- Steering: The steering wheel is connected to the front wheels, allowing for directional control.
- Suspension: Both front and rear suspensions are functional, providing realistic movement.
- Rear Spoiler: The rear spoiler can be manually deployed or retracted.
- Front Hood: The front hood opens to reveal a small storage compartment and the model's unique serial number.

Figure 4.1: The model showcasing its signature scissor doors in the open position.

Figure 4.2: The front hood lifted, revealing the storage compartment and unique serial number.
5. Maintenance and Care
To ensure the longevity and pristine condition of your LEGO Technic Lamborghini Sián FKP 37 model, follow these maintenance guidelines:
- Cleaning: Dust the model regularly with a soft brush or compressed air. For deeper cleaning, gently wipe with a damp cloth and mild soap, then air dry. Avoid harsh chemicals.
- Handling: Handle the model with care, especially when operating movable parts. Avoid applying excessive force to prevent damage to the intricate mechanisms.
- Display: Display the model in a stable, dry environment away from direct sunlight and extreme temperatures to prevent discoloration or warping of plastic elements.
- Durability: The LEGO Technic system is designed for durability. However, repeated disassembly and reassembly of complex sections may lead to wear over time.
6. Troubleshooting
While LEGO sets are designed for precision, occasional issues may arise during assembly or operation. Here are some common troubleshooting tips:
- Missing Pieces: If you believe a piece is missing, double-check all bags and the building area. LEGO sets are rarely missing pieces; often, they are misplaced or an incorrect part was used in an earlier step. Refer to the parts list in the instruction manual.
- Non-Functional Mechanisms (Gears, Steering, Doors):
- Review the relevant steps in the instruction manual carefully. Small errors in gear placement or pin alignment can prevent mechanisms from working correctly.
- Ensure all connections are firm and pieces are fully pushed into place.
- For the transmission, verify that all gears are correctly oriented and engaged as shown in the diagrams.
- Loose Connections: If parts feel loose, ensure they are connected to the correct studs or pins. Sometimes, a similar-looking piece might be used incorrectly.
For persistent issues or to request replacement parts, please visit the official LEGO Customer Service website.
7. Specifications
| Specification | Detail |
|---|---|
| Model Number | 42115 (Item model number: 6288790) |
| Brand | LEGO |
| Piece Count | 3,696 pieces |
| Product Dimensions | 22.44 x 14.76 x 5.91 inches (57 x 37.5 x 15 cm) |
| Assembled Dimensions | Over 5 in. (13 cm) high, 23 in. (60 cm) long and 9 in. (25 cm) wide |
| Item Weight | 0.502 ounces (approx. 14.2 grams) |
| Recommended Age | 18+ (Manufacturer recommended age: 3 months and up, but this is likely a general category, the product is clearly for adults) |
| Release Date | August 21, 2020 |
8. Warranty and Support
LEGO products are manufactured to high-quality standards and undergo rigorous testing. While specific warranty details for this collector's item are not explicitly provided, LEGO generally offers support for missing or defective parts.
For assistance with your LEGO Technic Lamborghini Sián FKP 37, including replacement parts or building advice, please visit the official LEGO Customer Service website: www.lego.com/service.
Your model includes a unique serial number, which can be found under the front hood. This serial number may unlock special online content or provide additional support resources from LEGO.