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Powerflex - BMW F20 F21 F22 Rear Front Radius Arm to Chassis Bush
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The POWERFLEX REAR SUBFRAME FRONT BUSH PURPLE is a polyurethane insert, by Powerflex for BMW F20 F21 F22. These are a great addition to any BMW build and an excellent low-cost improvement.
This is a replacement part that in our Road Series application is 60% stiffer than the original rubber bush to withstand increased loading seen by this position on the car. For a caster offset version please use PFF5-1901G.
Specifications:
- Number of Bushes Supplied: 2
- OEM Part Number: 31126855743
- OEM Part Number: 31126855741 / 31126855742
- Range: ROAD Series
Compatibility:
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BMW F20 F21 F22 (M140i M135i M235i M240i)
Warranty:
We understand it can be a bit confusing to figure out if a part will work for your car. No worries! Just shoot us a message with your question, and our friendly sales team will then be in touch to confirm if this part is the correct for your vehicle!
Disclaimer:
Products sold by Nineteen72 Performance are exclusively designed for off-road or sanctioned competition use. Any use on public roads is strictly prohibited and may violate local, state, and federal laws. Nineteen72 Performance does not confirm the legality of road use; it is the consumer's responsibility to comply with applicable laws. Use of these products for any purpose other than intended is at the user's own risk. Nineteen72 Performance is not liable for misuse or non-compliance.
Warranty:
At Nineteen72 Performance, we proudly back every product in our store, ensuring that each item comes with a comprehensive warranty.
All components crafted by our esteemed third-party partners in the store are accompanied by a minimum one-year manufacturer's warranty. Our warranty terms are uniform across all products, providing coverage for any manufacturing defects that may arise over time, excluding typical wear and tear. Your satisfaction and product durability are our top priorities.
Shipping & Returns:
At Nineteen72 Performance we offer worldwide shipping.
14-Day Easy Returns at Nineteen72 Performance
Love what you bought from Nineteen72 Performance? Great! If not, no worries. Enjoy a hassle-free 14-day return window. Just ensure your items are unused and in their original condition. For returns, contact us at Returns@Nineteen72Performance.co.uk. Your satisfaction drives us.
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Offers a number of options at checkout including: Pay Later (delay payment by up to 30 days, interest free); Split Payments (split payments in 3 up to 3 months, interest free); Installments (split payments up to 6 months interest-free, up to 24 months interest bearing). Maximum purchase £1,500.
0% Interest is available. Select 'Klarna' at checkout.
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Vehicle Fitment
Suitable for selected models. Please check the product title, part number and fitment notes before ordering.
If you are unsure whether this part fits your vehicle, contact us with your registration or vehicle details and we’ll be happy to help.
Powerflex questions answered
Here' some of our most asked questions about Powerflex.
What does this Powerflex bush do?
Powerflex bushes are designed to replace the softer original rubber bushes fitted from factory. The aim is to reduce unwanted movement in the suspension, drivetrain or chassis, helping the car feel sharper, more stable and more responsive.
Depending on where the bush is fitted, it can improve steering feel, braking stability, gear changes, traction or overall handling.
Is this Powerflex bush suitable for road use?
Yes, many Powerflex bushes are suitable for road cars, especially if you want a more direct and controlled feel without going too extreme. They are a popular upgrade for fast road cars, daily drivers and weekend cars where the original rubber bushes are worn or too soft.
For more focused track or motorsport use, Powerflex Black Series options may be better suited where available.
Will Powerflex bushes make my car harsher?
You may notice a slightly firmer or more connected feel, especially when replacing larger suspension or drivetrain bushes. That said, most road-focused Powerflex bushes are designed to improve control without making the car uncomfortable.
More focused bushes, particularly motorsport-style options, can increase noise, vibration and harshness, so it’s worth choosing the right version for how you use the car.
What is the difference between Powerflex Road Series and Black Series?
Powerflex Road Series bushes are designed for road and fast road use. They usually offer a good balance between improved handling, durability and comfort.
Powerflex Black Series bushes are more focused and are generally aimed at track, competition or heavily modified cars. They can offer a more direct feel but may also increase noise and vibration compared with standard rubber or Road Series bushes.
Why should I replace my original bushes?
Factory rubber bushes wear over time. As they get older, they can allow extra movement, which may lead to vague steering, poor alignment control, knocking noises, uneven tyre wear or a less precise feel from the car.
Replacing worn bushes with Powerflex upgrades can help restore control and improve the way the car feels, especially on performance cars used for fast road or track driving.
Are Powerflex bushes worth it?
Yes, especially if your original bushes are worn or you want a sharper, more controlled setup. They are a popular upgrade because they can improve the feel of the car without needing to change major components.
They’re particularly worthwhile on performance cars where suspension feel, alignment stability and chassis response matter.
Do I need to replace bushes in pairs?
In most cases, yes. It’s best practice to replace bushes in matching pairs across the same axle or suspension position. This helps keep the car balanced and avoids one side feeling tighter or newer than the other.
If you’re unsure what should be replaced together, get in touch before ordering and we’ll help point you in the right direction.
Is fitting Powerflex bushes difficult?
Some Powerflex bushes are straightforward to fit, while others require more time, tools or workshop equipment. Many original bushes need to be pressed out before the new bushes can be fitted.
If you’re not confident with suspension work, we’d recommend having them fitted by a professional garage.
Do I need a wheel alignment after fitting Powerflex bushes?
For suspension-related bushes, yes, we’d strongly recommend a wheel alignment after fitting. Changing bushes can affect geometry, and a proper alignment helps make sure the car drives correctly, handles well and doesn’t wear tyres unevenly.
For drivetrain bushes or inserts, alignment may not be required, but it depends on the part being fitted.
Will these bushes fit my car?
Please check the product title, fitment notes and vehicle details before ordering. Some models have different bush sizes depending on year, chassis, suspension type or factory options.
If you’re not 100% sure, send us your vehicle details or registration before ordering and we’ll help confirm the correct Powerflex part for your car.