Powerflex PFR5-422P Rear Subframe Rear Bushes - BMW F-Series Fast Road
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Description
Pair of full replacement rear subframe rear bushes. Powerflex PFR5-422P is the Purple 80A fast-road specification for the rear mounting positions of the rear subframe. These are subframe bushes, not differential mounting bushes or inserts for the original rubber bushes.
BMW applications covered by this listing
For the applicable original subframe mountings on BMW M135i/M140i F20/F21, M235i/M240i F22/F23 and 435i/440i F32/F33/F36. Match the original bush reference before ordering, especially where replacement subframes or different mounting components have been installed.
These are F-series chassis applications. The listing does not establish G-series M340i, G42 M240i or other later-generation fitment.
Specification and contents
- Powerflex reference: PFR5-422P.
- Mounting position: rear mounts of the rear subframe.
- Quantity supplied: two bushes.
- Material: Purple 80A polyurethane, fast-road specification.
- Original references: 33316758260, 33316768645, 33316792510 and 33312283383.
Powerflex positions this specification for more heavily tuned road cars and occasional track use. Bush choice can change transmitted noise and vibration, so select it according to the car's intended use.
Full replacement versus an insert
PFR5-422P replaces the existing bush. An insert is a different product that supports a retained original bush. Powerflex identifies PFR5-421 as the insert option for original reference 33316758260 and PFR5-1921 for original reference 33316792510. Neither insert is supplied under this listing.
Subframe bushes are not differential bushes
The subframe supports several rear chassis components, whereas the differential has its own separate mounting bushes. This pair does not include differential bushes, the front pair of subframe bushes or a dual differential bracket.
Installation
Inspect the subframe and mounting points, follow the Powerflex fitting instructions and check the alignment after relevant subframe work. Verify the exact chassis and original parts before ordering; there is no blanket fitment guarantee.
Compare related parts in the Powerflex suspension and differential mounting range.
Warranty, Shipping and Returns
Products are supplied with the applicable manufacturer warranty. We offer UK and worldwide shipping. Please refer to the live availability information and our shipping and returns policies before ordering. Contact us if you need to confirm compatibility, intended use or any product-specific conditions.
Finance Options
Available payment options and current terms are shown at checkout. Instalment options depend on the provider and eligibility. Please review the terms displayed before confirming your payment.
Specifications
- Brand
- Powerflex
- Product type
- Bushes
- SKU:
- PFR5-422P
- Vehicle make
- BMW
- Vehicle model
- 435i, 440i, M135i, M140i, M240i, and M235i
- Vehicle variant
- F20, F21, F22, F23, F32, F33, and F36
You’ll earn 160 Laps
For 1 item, including VAT but excluding delivery.
How it works
Sign in before ordering. Earn 1 Lap for every whole £1 of eligible product spend, including VAT.
Delivery, gift cards, sale-priced or discounted items and trade purchases do not earn Laps.
Purchase Laps become available 30 days after payment. Returns and refunds remove Laps earned on refunded items; pending Laps are cancelled.
This estimate follows your selected option and quantity. Checkout discounts can change eligibility. Bundle prices count once. Appstle records the final award after payment.
Sign in, open Spend Laps and choose an available reward. Redeem your Laps, copy your unique discount code and enter it at checkout using the same customer account.
Your tier makes your Laps go further: 1,000 Laps are worth £10 at Rookie, £12.50 at Contender, £20 at Pro or £25 at Champion. Choose £5 off £100, £10 off £200, £25 off £500 or £50 off £1,000 of eligible products.
Minimum spends include VAT and exclude delivery and ineligible products. Use one reward or discount code per order; it cannot be combined with any other product, order or shipping discount. Rewards apply only to eligible products and variants shown in your rewards profile. Returns and refunds remove the Laps earned on refunded items; pending Laps are cancelled. Spending Laps does not reduce your qualifying lifetime spend. Laps and standard reward codes do not expire.
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.
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