Powerflex Poly Bushes Pack – Rear Subframe Rear Bush Insert – PFR5-1921 – BMW 1 Series F20 F21 xDrive
Upgrade your BMW 1 Series xDrive handling with genuine Powerflex polyurethane rear subframe bush inserts. This performance suspension upgrade is designed to reduce unwanted subframe movement, sharpen chassis response and improve confidence on fast road driving.
Key details
- Part number: PFR5-1921
- Vehicle compatibility: BMW 1 Series F20 F21 xDrive
- Position: Rear subframe rear bush insert
- Diagram reference: 21
- Number of bushes in the pack: 2
- BMW reference: 33316792510
Why choose Powerflex rear subframe bush inserts
- Reduces subframe movement by filling the voids in the original rubber bush
- Improves handling, steering precision and rear-end stability
- Enhances traction and braking consistency
- Promotes even tyre wear and better road contact
- Durable polyurethane construction designed for performance and longevity
- Excellent value performance upgrade with a lifetime warranty
What this part does
This insert fits into the voids of the factory rear subframe bush to control flex and movement without the cost and complexity of replacing the complete bush. The result is a tighter rear end, more predictable chassis behaviour and a more connected drive, ideal for fast road and track-day oriented setups while keeping day-to-day usability.
Real-world results
We have fitted and used these Powerflex bush inserts on our own cars and customer vehicles, and the feedback is consistently positive. Sharper turn-in, improved stability and a more planted feel from the rear are the most common compliments. Customers choose this as a cost-effective BMW suspension upgrade that delivers immediate benefits.
Perfect search terms
Powerflex bushes BMW 1 Series, Powerflex PFR5-1921, BMW F20 F21 xDrive rear subframe bush insert, BMW poly bushes, polyurethane bushings, BMW rear subframe insert, uprated suspension bushes, handling upgrade, performance suspension, chassis bush kit, BMW 1 Series xDrive suspension upgrade, rear subframe bush upgrade, performance car parts UK.
Fitting and support
This is an insert kit that works with the original bush. For professional installation or advice, we recommend booking fitting with Nforcd in Warwickshire. Request a quote at Sales@nforcd.com.
Included in the box
- 2 x Powerflex rear subframe rear bush inserts
- Fitting instructions
Buy with confidence
- Genuine Powerflex product
- Lifetime warranty
- Trusted by enthusiasts for performance, precision and durability

