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If you drive a Ford Fiesta Mk7 (CB1, CCN 2008–2017), Fiesta Mk7 ST (2013–2017), Ford B-Max (2012–2017), Ford EcoSport CBW (2014-on), or Mazda 2 DE/DH (2007–2015), you may have noticed rear-end instability, uneven tyre wear, or excessive axle movement.

Our 40BR Rear Beam Bush is engineered to replace OEM part numbers: 1535296, 1751679, 1805815, 1805866, 1871475, 8V51-5K653-AA, AY11-5K653-AA, D65128460, Delphi TD1629W, and Febi 34748. It’s designed for everyday driving while providing long-lasting stability.

Why OEM Rear Beam Bushes Fail

Rubber Deterioration Over Time

Original rubber bushes degrade with heat, moisture, road salt, and ozone exposure. Over time, they soften, crack, and detach from the sleeve, causing unwanted rear movement.

Excessive Compliance

OEM bushes are soft to maximise comfort, but this leads to rear axle steer, unstable cornering, and increased tyre wear — especially noticeable in European driving conditions like winding Alpine roads or urban cobblestones.

Voided Design and Fatigue Points

Many OEM bushes are voided to allow flex. Once the rubber fatigues, these voids concentrate stress and accelerate failure.

Why Rubber Isn’t Ideal for Rear Axle Bushes

The rear beam must:

• Support lateral forces

• Control braking loads

• Maintain rear toe alignment

• Isolate vibrations

Rubber loses integrity under prolonged load, resulting in geometry shifts and unpredictable handling — something no European driver wants on highways, mountain passes, or city streets.

Why Polyurethane is the Smarter Choice

Resistant to Environmental Factors

Polyurethane resists oil, salt, ozone, and heat. It maintains performance for years, unlike rubber.

Controlled Compliance for Comfort

The 40BR bush is engineered to allow exactly the right movement — stabilising the rear axle without making the ride harsh.

Everyday European Driving

From German Autobahns to French country roads, Italian autostrade to Spanish urban streets, the 40BR bush delivers predictable, safe handling without sacrificing comfort.

Comfort Meets Everyday Driving

City and Highway Benefits

• Reduced rear-end “thud” over bumps

• Improved straight-line stability

• Sharper, more predictable cornering

Noise and Vibration Reduction

Our polyurethane bush minimises vibrations and noise, keeping your daily commute comfortable while your rear axle remains perfectly aligned.

Easy Installation

DIY or Workshop-Friendly

The 40BR bush is a direct replacement, fitting without modification. Suitable for professional mechanics and knowledgeable DIYers alike.

When to Upgrade

• During suspension overhauls

• Rear brake replacement

• Technical inspections or MOT advisories

Proven Across Europe

Relevant in Germany, France, Italy, Spain, and Scandinavia

European drivers face the same rear beam bush issues as UK drivers, often worsened by winter road salt and rough surfaces. Polyurethane is perfectly suited to these conditions.

Long-Term Solution for EU Roads

The 40BR bush stabilises your rear axle, reduces repeat repairs, and maintains geometry for safer, more predictable handling.

Bottom Line – Why Upgrade to 40BR

• Direct replacement for OEM 1535296, TD1629W, Febi 34748

• Improves rear axle stability for everyday European driving

• Polyurethane ensures durability and comfort over standard rubber

• Available for shipping across Europe — Germany, France, Italy, Spain, Scandinavia

Want to learn more?

How Polybush 40BR Solves Failing Rear Axle Bushes on Fiesta Mk7, Mazda 2 & More

If you own a Ford Fiesta Mk7 (CB1, CCN) — whether Non-ST (2008–2017) or ST (2013–2017) — chances are you’ve either experienced, or are about to experience, rear axle bush failure. The same problem also affects the Mazda 2 (DE, DH) 2007–2015, Ford B-Max (JK) 2012-on, and Ford EcoSport (CBW) 2014-on.

It’s one of those common faults that sneaks up on you. One minute the car feels fine, the next it’s vague through corners, unsettled on the brakes, and just not as tight as it used to be.

The OEM Rear Axle Bush Problem

The original rear beam bushes — commonly found under OEM part numbers:

1535296, 1751679, 1805815, 1805866, 1871475, 8V51-5K653-AA, AY11-5K653-AA, D65128460

…have gained a bit of a reputation, and not a good one.

The issue isn’t abuse or mileage alone — it’s the design and materials. The plastic outer shell cracks, the rubber debonds from the centre tube, and the voided rubber simply can’t cope with real-world loads for long. Once that happens, the rear axle is free to move far more than it should.

And that’s where the fun starts.

Symptoms of Failing Rear Axle Bushes

If your Fiesta Mk7 or Mazda 2 is suffering from worn rear axle bushes, you’ll usually notice:

• A loose or unsettled feeling when cornering

• Excessive vibration or road noise

• Poor rear-end stability under braking

• Reduced driver confidence and feedback

Left unchecked, worn rear beam bushes don’t just affect handling — they accelerate wear in tyres, suspension components, and braking performance, turning a relatively simple job into an expensive chain reaction.

Why Polybush 40BR Is the Long-Term Fix

This is exactly why we developed the Polybush 40BR rear axle bush.

Rather than replicating the weaknesses of the factory rubber bush, the 40BR is manufactured from high-quality polyurethane, engineered to resist deflection, fatigue, and debonding.

Key Benefits of Polybush 40BR

✔ Sharper, More Predictable Handling
By removing the large voids found in the OEM bush, the rear axle is properly located. The result is noticeably better cornering precision and rear-end stability — especially noticeable on Fiesta Mk7 ST models.

✔ Comfort Is Retained
This isn’t about turning your daily driver into a bone-shaker. The 40BR is tuned to control movement without introducing harshness, so ride comfort remains spot-on for road use.

✔ Improved Tyre Life & Braking Stability
Less axle movement means more consistent tyre contact and better braking confidence. It’s one of those upgrades that quietly improves everything the car does.

Easy Installation – No Axle Removal Required

One of the big wins with the Polybush 40BR is installation.

Unlike some solutions, the rear axle does not need to be removed from the vehicle. We have heard the average time it takes to install is around 30 mins! That makes it a far more appealing job for:

• Independent garages

• Performance specialists

• Competent DIYers

Less labour, fewer seized bolts, and a quicker turnaround — all without compromising on results.

Why Polyurethane Beats Rubber Every Time

If you’re replacing rear axle bushes on a Fiesta Mk7, fitting rubber again is usually just delaying the inevitable. Polyurethane doesn’t suffer from the same ageing, cracking, or debonding issues, which means:

• Longer service life

• More consistent performance

• Less money spent redoing the same job

As we say for good reason: “Fit it once, fit Polybush.”

Related Suspension Upgrades for Fiesta Mk7 & Mazda 2

While the 40BR rear axle bush solves the most common rear-end issue, it’s often worth considering related components while you’re there:

• Front Wishbone Bushes

  • 40BM (Front)

  • 40BN (Rear)
    Ideal for restoring steering accuracy and braking stability.

• Front Anti-Roll Bar Bush – 40BS
  Helps maintain proper suspension geometry and reduces unwanted body roll.

• Rear Spring Upper Anti-Squeak Pad – 40CH
  A simple but effective addition when working on the rear axle, reducing noise and improving refinement.

All parts are engineered to the same exacting standards and are available directly from us.

If you own a Mk7 Fiesta – whether it’s the everyday 1.25 Zetec or a lively Ford Fiesta ST (Mk7) – there’s one suspension component that almost always crops up as a weak point: the rear axle (beam) bushes.

We supply a complete Front Wishbone & Rear Axle Bush Kit (KIT 192) for these cars, but let’s be honest – the bush that fails, knocks, creaks and causes rear-end movement time and time again is the rear beam bush. That’s why the Polybush 40BR Rear Axle Bush has become such a popular fix.

If you’re searching for:

• Rear axle bushes Ford Fiesta

• Mk7 Fiesta rear axle bushes

• Ford Fiesta rear axle bush replacement

• Rear bushes on Ford Fiesta making noise

• Rear axle bushes replacement cost Ford Fiesta

…you’re in exactly the right place.

Why Do Rear Axle Bushes Fail on the Mk7 Fiesta?

The Mk7 Fiesta uses a torsion beam rear axle. It’s a simple, strong design – great for daily driving – but it relies heavily on two large rubber bushes that mount the beam to the body.

From the factory, these bushes are soft rubber. Over time they:

• Crack and split

• De-bond from their outer sleeve

• Soften and allow excessive movement

• Start knocking when pulling away or going over bumps

Common symptoms include:

• A dull thud from the rear when changing gear

• Instability during braking

• Rear-end “wiggle” on uneven roads

• Uneven tyre wear

• Vague rear suspension feel

Many owners describe it as “Fiesta movement” at the back of the car – that slight delay before the rear follows the front.

If you’ve searched for Ford Fiesta rear suspension bushes or Fiesta rear axle bushes making noise, chances are these are the culprits, and your bushes have already failed!

The Polybush 40BR Rear Axle Bush – A Proper Fix

Our Polybush 40BR replaces the original Ford rear beam bush.
OEM Cross Reference: 1535296, 1751679, 1805815, 1805866, 1871475, 8V51-5K653-AA, AY11-5K653-AA, D65128460

Even these aftermarket bushings:
Delphi No: TD1629W
Febi No: 34748.

Unlike the factory rubber bush, the 40BR is manufactured from our specially formulated, UK-made polyurethane.
And that changes everything.

Why Polyurethane Outperforms Rubber

Let’s clear something up: this isn’t about turning your Fiesta into a track car. This is about making it better at being a daily driver.

Here’s why polyurethane makes sense on the rear axle:

1. It Doesn’t Degrade Like Rubber

Rubber is vulnerable to:

• Oil contamination

• Road salt

• Heat cycling

• Age hardening

Polyurethane is resistant to all of the above. It won’t crack, perish or soften in the same way. That means:

• No premature failure

• No repeated rear axle bush replacement

• No coming back to the same job in 18 months (or sometimes as little as MOT to MOT)

If you’re looking up rear axle bushes Ford Fiesta cost, it’s worth considering the long-term picture. Fit them once. Do it properly. Our bushes are great for people who want to book their car in, get the work done and never need to look at it again. Rubber might have a low up-front cost, but replacing it every year doesn’t make financial sense.

2. Retains Comfort – Without the Sloppiness

There’s a misconception that polyurethane equals a harsh ride. That’s true of some race-spec bushes. It’s not true of ours.

The 40BR is engineered to:

• Control unwanted rear beam movement

• Maintain correct axle geometry

• Absorb road vibration

The results?

You retain everyday ride comfort, but lose the rear-end wobble and knock. The car feels tighter and more planted, especially under braking and on roundabouts.

On a Ford Fiesta Mk7 rear axle, that balance is exactly what you want.

3. Sharper Handling Without Trying to Be “Sporty”

Even if you don’t drive a Fiesta ST, you’ll notice the difference.

• More predictable rear end

• Improved stability on uneven roads

• Better response to steering inputs

For Fiesta ST rear axle owners, it’s even more noticeable – but for standard models, it simply makes the car feel fresher and less worn.

It’s refinement, not aggression – A product you’d be happy putting on your mum’s car.

Why We Sell Them as a Pair?

Polyurethane behaves differently from rubber; you must replace these bushes in pairs.

Mixing one old rubber bush with one polyurethane bush will create uneven compliance across the rear axle. That can affect braking stability and handling balance.
Additionally, if one bush has failed, realistically, the other side will fail soon too. So taking the car off the road once, having one labour bill and one inconvenience is better.

As such, we supply them as matched sets. It’s the correct way to do the job… Again, do it once, do it right!

Installation – Straightforward and Affordable

Good news: this isn’t a nightmare job.

On the Mk7 Fiesta:

• The rear beam stays on the car

• The old plastic-shelled bushes are hammered out

• The new Polybush units are pushed in by hand

A competent DIYer with simple hand tools can tackle it at home. Alternatively, most garages charge a fairly modest amount because the job is straightforward and not time-consuming.

Compared with some bush changes, this is refreshingly simple.

If you’ve been pricing up Ford Fiesta rear axle bush replacement cost, you’ll likely find labour is reasonable – and with polyurethane, you won’t be repeating it.

Common Search Questions – Answered

“Is this the same as Ford Fiesta rear subframe bushes?”

On the Mk7 Fiesta, the torsion beam effectively acts as the rear subframe. When people search for rear subframe bushes Ford Fiesta or Ford Fiesta rear subframe bushes, they’re usually referring to these rear beam bushes.

“Is this relevant to other Fiesta models?”

Whilst we make bushes for other fiesta’s, the main focus here is the Mk7:

• Mk7 Fiesta (2008–2017)

• Mk7 Fiesta ST (2013–2017)

Owners of earlier models (like 2007 Ford Fiesta rear axle or Mk6 Fiesta rear axle bushes) will require different part numbers, all of which we have HERE

“What about Fiesta Mk8 bushes?”

The Mk8 uses a different rear suspension layout, so the bushes differ.
However, we do offer suspension bushes for these models, you can find them HERE

When Should You Replace Rear Axle Bushes?

If your Ford Fiesta rear suspension feels:

• Noisy at the back

• Loose under braking

• Unsettled mid-corner

• Clonking when pulling away

It’s worth inspecting the rear axle bushes Fiesta owners often overlook.

On many Mk7s, they’re worn by 60–80k miles. On cars used for short trips or city driving, sometimes sooner.

Why We Recommend the Polybush 40BR

We fit them to our own daily-driving Ford Fiesta’s! We wouldn’t fit rubber again!
Not because rubber is terrible – but because it’s a consumable part in this location. The rear beam places a constant rotational load through those bushes. Polyurethane handles that load better, maintains its shape, and keeps the axle located correctly.

With Polybush, you get:

• Longer service life

• Improved stability

• Maintained ride comfort

• Better value over time

And you stop chasing rear-end noises.

The Bottom Line

Our Polybush 40BR Rear Axle Bush is a simple upgrade that solves a very common problem on the Mk7 Fiesta and Fiesta ST. Fit them as a pair, refresh the rear of the car properly, and you’ll be reminded how composed and solid a Fiesta should feel.

Sometimes the best upgrades aren’t about performance – they’re about restoring the car to how it should have felt all along.

Find your Ford – HERE