27.07 GBP
Lesjöfors 8108433 Bonnet
Manufacturer's item number: 8108433Quality product Brand new
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Lesjöfors 8108433 Bonnet: The Ultimate Rear Boot Gas Spring for BMW 3 Series
The Lesjöfors 8108433 Bonnet is a high‑performance rear boot gas spring designed specifically for the BMW 3 Series (F30, F80). It delivers smooth, controlled lift and reliable support for the tailgate, ensuring effortless opening and closing while protecting the vehicle’s interior from wear. This component is engineered to meet or exceed OEM specifications, providing durability and consistent performance over thousands of cycles.
Key Features
- Precision Engineering: Manufactured with a hardened steel core and a corrosion‑resistant coating, the spring offers exceptional strength and longevity.
- Consistent Lift Force: The gas pressure is calibrated to provide a steady lift force that matches the original BMW design, preventing sudden jerks or excessive weight on the tailgate.
- Compact Design: Its slim profile fits seamlessly into the existing boot area without requiring modifications to the vehicle’s frame or suspension.
- Easy Installation: The spring comes with all necessary mounting hardware and clear instructions, allowing for a straightforward swap from the stock component.
- Enhanced Safety: By maintaining proper tailgate alignment, it reduces the risk of accidental opening or damage to the rear bumper during heavy use.
Compatibility Overview
The Lesjöfors 8108433 Bonnet is specifically engineered for the following BMW models:
- BWM 3 Series (F30, F80)
- All variants of the rear boot area that require a gas spring for lift support.
It can also be used as an OEM replacement in other vehicles where the dimensions and mounting points match those of the BMW 3 Series. However, always verify compatibility with your specific vehicle model before purchase.
Technical Specifications
| Parameter | Description |
|---|---|
| Model Number | 8108433 Bonnet |
| Type | Rear Boot Gas Spring (Strut) |
| Material | High‑strength steel with corrosion‑resistant coating |
| Operating Pressure | Approximately 300–350 psi (adjusted to match OEM) |
| Length | Compatible with standard boot dimensions of BMW F30/F80 |
| Weight Capacity | Supports full tailgate weight plus additional cargo load |
| Installation Time | Approximately 30–45 minutes with standard tools |
Benefits of Choosing Lesjöfors 8108433 Bonnet
- Reliability: Built to withstand the harsh conditions of daily driving, including temperature extremes and road debris.
- Performance Consistency: Maintains a smooth lift curve throughout its lifespan, ensuring that the tailgate remains level and easy to operate.
- Cost‑Effective Replacement: Offers OEM quality at a competitive price point, reducing long‑term maintenance costs.
- Enhanced Vehicle Value: A well‑maintained rear boot system contributes positively to the overall condition and resale value of the vehicle.
Installation Guide
The following steps outline a typical installation procedure. Always refer to the manufacturer’s instructions for specific torque settings and safety precautions.
- Preparation: Park the vehicle on a level surface, engage the parking brake, and open the rear boot fully.
- Remove Existing Spring: Locate the mounting brackets on the rear frame. Use a socket wrench to loosen the retaining bolts and carefully detach the old gas spring.
- Inspect Mounting Points: Clean any debris or corrosion from the mounting surfaces to ensure proper fitment.
- Install New Spring: Position the Lesjöfors 8108433 Bonnet onto the brackets. Align the attachment points precisely with the vehicle’s frame.
- Tighten Bolts: Secure the spring using the supplied bolts, tightening to the specified torque values (typically 20–25 Nm).
- Test Operation: Gently open and close the tailgate several times to confirm smooth movement and proper lift force.
- Final Check: Verify that all fasteners remain tight and that there are no abnormal noises during operation.
Maintenance Tips
- Inspect the spring annually for signs of wear, corrosion, or leakage.
- Keep the mounting area clean; apply a light coat of anti‑rust spray if necessary.
- Avoid overloading the tailgate beyond its designed capacity to prevent premature failure.
Why Lesjöfors Stands Out
Lesjöfors has earned a reputation for producing high‑quality automotive components that blend performance with durability. The 8108433 Bonnet exemplifies this commitment, offering:
- Precision Manufacturing: Each spring undergoes rigorous quality control to ensure consistent pressure and structural integrity.
- Industry Expertise: Years of experience in automotive suspension systems inform every design decision.
- Customer Support: Comprehensive technical documentation and responsive service help users achieve optimal installation results.
Conclusion
The Lesjöfors 8108433 Bonnet is the definitive choice for anyone seeking a reliable, high‑performance rear boot gas spring for their BMW 3 Series. Its robust construction, precise lift characteristics, and straightforward installation make it an indispensable upgrade that enhances both functionality and vehicle longevity.
By investing in this premium component, owners can enjoy smooth tailgate operation, protect the interior from wear, and maintain the aesthetic integrity of their vehicle for years to come.
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| Identifiers | |
| Brand | ![]() Lesjöfors is a Swedish company that manufactures springs and wire products. It was founded in 1916 and is now a subsidiary of the Swedish company IKV. |
| Model | Lesjöfors 8108433 |
| MPN | Lesjöfors 8108433 |
| ID | 7077920 |
| Dimensions / Weight | |
| Key Features | |

