SuperPro SPF3946K Rear Subframe Mount Bushing Set – 2011 BMW 1 Series M (E82/E88)
Upgrade rear-end stability and chassis control with the SuperPro SPF3946K Rear Subframe Mount Bushing Set, engineered specifically for the 2011 BMW 1 Series M. This high-performance polyurethane bushing kit replaces compliant factory rubber mounts to help reduce rear subframe movement, sharpen handling response, and improve power delivery—ideal for spirited street driving, track days, and performance builds.
Key Benefits
- Reduced rear subframe deflection: Helps minimize unwanted movement for improved stability and traction.
- Sharper handling & turn-in: Increases chassis precision and rear-end confidence during aggressive cornering.
- Durable polyurethane construction: Designed to resist oil, heat, and wear versus standard rubber mounts.
- Direct-fit replacement: Fits factory subframe locations—no cutting or fabrication required.
- Long service life: Maintains performance over time with reduced deformation compared to rubber.
Why Upgrade Rear Subframe Bushings on the 1 Series M?
The BMW 1 Series M benefits significantly from increased rear subframe control. Worn or soft factory mounts can contribute to rear-end “slop,” inconsistent traction, and delayed chassis response. By tightening the subframe interface, this kit supports better feedback, stability under load, and improved driveline response especially on lowered or track-driven setups.
Specifications
| Part Number | SPF3946K |
|---|---|
| UPC | 9317745039464 |
| Position | Rear Subframe Mount Bushings (Complete Set) |
| Material | SuperPro Polyurethane |
| Vehicle Fitment | 2011 BMW 1 Series M Base (E82/E88) |
| Country of Origin | Australia |
| Warranty | Limited Lifetime |
Fitment
This part fits:
- 2011 BMW 1 Series M Base (E82/E88 chassis)
Installation Notes
- Estimated install time: 4–6 hours
- Difficulty: Advanced (subframe removal and bushing pressing required)
- Recommendation: Professional installation strongly recommended
- Alignment: A professional alignment is recommended after installation
Frequently Asked Questions
Will this make the ride harsher?
Expect a slightly firmer feel versus stock rubber mounts. Most owners notice improved handling and stability without excessive harshness for street use.
Do I need an alignment after installation?
Yes. Because installation involves subframe work, a professional alignment is recommended to ensure proper geometry and tire wear.
Does SPF3946K fit other BMW 1 Series models?
This kit is intended for the 2011 BMW 1 Series M. Fitment for non-M variants can differ verify compatibility before ordering.
Is this a DIY install?
This is an advanced job requiring subframe removal and pressing tools. Professional installation is recommended for best results.
Shipping & Handling
- Shipping method: UPS / FedEx Ground
- Availability: In stock (ships same or next business day)
- Packaging: Official retail box
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