16 October 2025
Speak to one of our experts.
Speak to one of our experts.
29 October 2025
Share:
New Products
Since its launch in 2012, the Mitsubishi Outlander Mk3 PHEV (GF, GG, ZJ, ZK, ZL) has been a game-changer in the plug-in hybrid market. It offers electric efficiency combined with petrol reliability, making it one of the most popular hybrid SUVs in the UK and Europe.
However, beneath the smooth, silent running of its electric powertrain lies a known weak spot – the rear motor mount, front bracket bush. Owners and technicians alike have found that this particular bush wears prematurely, creating unwanted noise, vibration, and harshness (NVH) that detracts from the refined feel of the vehicle.
At the heart of this issue is the Rear Motor Mount Front Bracket Bush, found in the rear motor mount assembly (OEM part numbers 3517A090 and 3517A053). This bush plays a vital role:
it supports the rear electric drive motor and isolates vibrations from the chassis, ensuring smooth power delivery between electric and petrol modes.
Noticeable vibration through the cabin, especially under acceleration
A “clunk” or jolt when transitioning between drive and regeneration modes
Increased drivetrain movement and harshness when engaging drive or reverse
Reduced comfort and refinement
Hybrid systems generate high torque at low RPM, which puts significant stress on these bushes. Over time, the original rubber compound softens, splits, or even separates from its metal sleeve. Unfortunately, replacement of the full OEM mount is costly – and using the same rubber component means the issue will likely reoccur.
To address this recurring fault, Polybush developed the 17AW polyurethane replacement bush, designed specifically for the Mitsubishi Outlander Mk3 PHEV (GF, GG, ZJ, ZK, ZL).
Instead of replacing the entire OEM mount, the Polybush 17AW allows technicians and owners to replace only the worn bush within the existing bracket. This makes it a cost-effective, long-term upgrade that maintains the vehicle’s comfort while greatly improving durability.
Direct-fit design – Installs into the original mount housing (OEM 3517A090 / 3517A053)
OEM comfort, Polybush longevity – Retains ride quality while improving bush life
Resistant to wear and deformation – Polyurethane resists oil, heat, and road contaminants
Reduces drivetrain movement – Improves response and stability during acceleration
Manufactured and tested in the UK – Ensuring consistent quality and precision
One of the biggest advantages of Polybush’s approach is that it doesn’t trade comfort for performance. The 17AW bush has been carefully tuned to maintain the Outlander’s factory refinement, ensuring that vibrations remain isolated while providing firmer support for the hybrid drivetrain.
This means drivers enjoy:
Improved throttle response
Reduced cabin vibration
Greater drivetrain longevity
A more consistent hybrid driving experience
Rubber bushes like the OEM 3517A090 / 3517A053 are prone to fatigue from repeated load cycles, especially in hybrid vehicles where torque delivery is instantaneous. The soft compound eventually degrades, allowing excess engine and motor movement that stresses surrounding components.
Polybush polyurethane, however, is chemically resistant and mechanically stable. It doesn’t compress or perish like rubber, and its precision moulding ensures proper alignment and load distribution. As a result, Polybush 17AW eliminates the play that leads to premature wear and failure – without increasing NVH.
Replacing the bush is straightforward for workshops and experienced DIY enthusiasts. The existing mount is removed, the worn OEM bush pressed out, and the Polybush 17AW pressed in using standard tools. The result is a refreshed, strengthened mount that restores the feel and performance of the Outlander PHEV.
| Specification | Details |
|---|---|
| Vehicle | Mitsubishi Outlander Mk3 PHEV |
| Years | 2012–2021 |
| Chassis Codes | GF, GG, ZJ, ZK, ZL |
| OEM Part Numbers | 3517A090 / 3517A053 |
| Polybush Replacement | 17AW |
| Position | Rear Motor Mount Front Bracket Bush |
The Mitsubishi Outlander Mk3 PHEV is a reliable and innovative hybrid SUV, but its rear motor mount front bracket bush remains a common weak point. The Polybush 17AW replacement provides the perfect upgrade – retaining comfort, improving longevity, and preventing the all-too-familiar vibrations caused by OEM bush failure.
Upgrade once – and drive with confidence.
Vehicle Sets
OE Reference: 3517A053, Part of 3517A090,
Bushes Per Vehicle Set: 1
Vehicle Sets
OE Reference: 3517A053, Part of 3517A090,
Bushes Per Vehicle Set: 1
