Powerflex Poly Bushes Pack – Front Radius Arm To Chassis Bush – PFF5-1901 – BMW 1 Series F20 F21
Upgrade the front end of your BMW 1 Series F20 and F21 with the Powerflex Front Radius Arm to Chassis Bush kit, part number PFF5-1901. These polyurethane bushes are a proven, high-quality performance suspension upgrade that tightens up steering feel, improves braking stability and delivers sharper, more predictable handling on the road. We use these bushes ourselves and our customers consistently report crisper turn in, better stability under braking and longer lasting performance compared to tired OEM rubber bushes.
Designed for the Road Series, this direct replacement front control arm bush is 60 percent stiffer than the original rubber bush to handle increased loads at the radius arm to chassis mounting point. By controlling unwanted suspension movement, Powerflex bushes help your tyres maintain better contact with the road, improving safety, grip and confidence. Correctly formulated polyurethane can be as good as, if not better than, rubber at suppressing noise, vibration and harshness, while resisting oil, road grime and ageing that quickly degrade standard bushes.
Key features and benefits
- Precision steering and improved turn in for BMW 1 Series F20 F21
- Reduced braking instability and tramlining at the front axle
- Greater tyre contact patch for better grip and tyre wear
- 60 percent stiffer than OEM rubber to control deflection under load
- Durable polyurethane resists cracking, tearing and contamination
- Prolonged tyre life and improved cost effectiveness over time
- Lifetime Warranty from Powerflex
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Product details
- Part number: PFF5-1901
- Vehicle fitment: BMW 1 Series F20 F21
- Position: Front radius arm to chassis
- Diagram reference: 1
- Number of bushes in the pack: 2
- Series: Road Series
- Caster offset version available: PFF5-1901G
Why choose Powerflex polyurethane bushes
Powerflex poly bushes reduce unwanted flex in suspension arms, keeping geometry stable under cornering and braking. This helps your suspension do the job it was designed for, which means more consistent handling, improved road holding and better feedback through the steering wheel. Polyurethane construction offers long-term durability and consistent performance where standard rubber bushes soften and fail.
Common symptoms these bushes help cure
- Imprecise or vague steering
- Uneven tyre wear at the front
- Instability or shimmy under braking
- Clunks from worn front control arm bushes
Cross references
OEM references commonly associated: 31126855743, 31126855741, 31126855742.
Professional fitting
For expert fitting, book in with Nforcd in Warwickshire. Request a quote at Sales@nforcd.com.
Choose Powerflex PFF5-1901 for your BMW 1 Series F20 F21 if you are searching for a reliable, performance-focused front control arm bush upgrade that delivers sharper handling, stability and durability with a Lifetime Warranty.

