21 September 2026
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Speak to one of our experts.
27 January 2026
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Advice Blog
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 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.
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.
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.
✔ 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.
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.
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.”
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
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.
Vehicle Sets
OE Reference: AY11-5K653-AA, TD1629W, 8V51-5K653-AA, 34748, 1535296, 1751679, 1805815, 1805866, 1871475
Bushes Per Vehicle Set: 2
Product Specifications:
– Bush Type: Rear Axle (Beam) Bush
– Polybush Part Number: 40BR
– Grade: Performance
– Shore A Hardness: 85
– Bush Design: Unique Top Hat
– Contains: 2 x Polyurethane Bushes
– Replaces OEM Part: 1535296, 1751679, 1805815, 1805866, 1871475, 8V51-5K653-AA, AY11-5K653-AA, D65128460
– Weight: 0.81kg
– Delphi No: TD1629W
– Febi No: 34748
Vehicle Fitment:
Ford B-Max MK6 (2012-2017)
Ford EcoSport CBW (2014-2023)
Ford Fiesta Mk7 Non ST (2008-2019)
Ford Fiesta Mk7 ST (2013-2017)
Mazda 2 DE/DH (2007-2015)
Why Choose Polybush?
If you’re replacing tired, perished rubber bushes, Polybush polyurethane bushes are a smart long-term upgrade. Here’s why:
– Longer Lasting: Polybush suspension bushes are designed to last significantly longer than standard rubber and are resistant to oil, road grime and age-related deterioration.
– Improved Handling: Polyurethane reduces unwanted flex, helping improve steering response, stability and suspension control.
– Comfort Maintained: Engineered to improve steering feedback and control while retaining a comfortable road-going ride.
– No Grease Required: Polybush products are designed for dry fitting, meaning no messy greasing during installation.
– Made in the UK: Manufactured entirely in the UK using Polybush’s specialist polyurethane formulations and production processes.
Key Benefits at a Glance:
– Direct replacement for your original suspension bushes.
– Improved suspension control and drivability
– Resistant to wear, chemicals, oil, UV and weathering
– Suitable for daily drivers, fast-road vehicles, classic cars, 4x4s and commercial applications
– Manufactured in the UK
– ISO 9001 accredited quality system
Ideal for:
– Daily Driven Vehicles: Restore suspension performance while maintaining OE-style comfort.
– Fast Road or Lightly Modified Cars: Improve suspension control without unnecessarily compromising ride quality.
– Classic or Older Models: Replace degraded, cracked or perished original rubber bushes with a durable polyurethane alternative.
– Fleet, Commercial, or 4×4 Vehicles: Improve durability and maintain consistent suspension performance in demanding applications.
Upgrade your bushes today with Polybush – A long-lasting, British-made solution for sharper handling and reliable comfort.
– Trusted UK Manufacturer – Polybush
