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A strut bump stop is a small elastomer component that decides how a front strut behaves at the end of its compression travel. On Volkswagen models that use a MacPherson strut front end, the stop prevents the damper from bottoming out metal to metal and protects the mount, the bearing, and the damper seals around it. Buyers usually arrive at this part through one of four routes: the OE number 5Q0511357F, the vehicle model, the material and dimensions, or a request for a custom-moulded equivalent. This page answers all four from a sourcing point of view.
Also called a jounce bumper, strut buffer, or compression stop, the part is a moulded elastomer sleeve that sits on the piston rod of the strut. In normal driving it stays clear of the strut mount. Under a hard compression event — a pothole, a speed bump, a fully loaded car — it engages progressively and converts the last part of the travel into controlled resistance instead of a metal impact.
Elastomer parts age. Heat, ozone, road salt, and repeated compression cycles harden the material until it cracks and loses its progressive behaviour. At that point the strut begins to bottom out and the failure spreads to the mount and the damper. For the wider category, see our auto parts catalogue.
The item described here is a front strut bump stop for Volkswagen applications, referenced under OE number 5Q0511357F and Bonpora number 4110006. The table below lists the data buyers ask for before requesting a quotation.
| Parameter | Value |
|---|---|
| Product name | Strut Bump Stop |
| OE number | 5Q0511357F |
| Bonpora no. | 4110006 |
| Fitment | Volkswagen (front strut applications) |
| Dimensions | Φ14.5 x Φ61.9 x 133.8 mm |
| Material | Polyurethane |
| Country of origin | China |
| Warranty | 1 year |
| Delivery time | 15–30 days |
| Packaging | Neutral export packaging |
| Custom service | OEM & custom design support |
Φ14.5 mm is the inner bore that fits over the piston rod, Φ61.9 mm is the outer diameter of the elastomer body, and 133.8 mm is the free length. At 133.8 mm this is a relatively long stop, and that length is the value most often mis-copied when a buyer cross-references by photo alone. A stop with the correct bore but the wrong free length engages earlier or later than the original, which changes how the car behaves under load and generates warranty complaints at the counter.
Polyurethane suits this application well. Compared with conventional rubber it resists tearing and oil exposure better, holds its shape over a wider temperature range, and can be moulded to a controlled hardness so the compression curve stays progressive rather than abrupt. That makes it a practical choice for daily-driven cars and for lightly modified suspension setups alike.
OE 5Q0511357F covers a range of Volkswagen models built on shared front strut architecture, with the 5Q0 prefix pointing to the MQB-era platform family. Fitment varies by platform, model year, and whether the car left the factory with standard or sport suspension, so the vehicle identification number or the part removed from the car remains the most reliable reference.
Bump stops are a low-unit-value, high-turnover line that supports higher-margin suspension sales. Sourcing them well is mostly about consistency rather than the lowest quotation.
Suppliers with OEM and custom design capability can produce stops to a customer drawing or sample, including non-standard bore sizes, different hardness grades, and application-specific profiles. This suits distributors building a private-label suspension range as well as workshops servicing cars with modified ride heights. If you need a made-to-spec part, our auto parts sourcing team can review drawings and samples alongside OE-referenced items.
For catalogue items held in stock, 15–30 days covers production and export preparation. New tooling adds development time, so plan the first order of a private-label line well before the selling season.
A worn bump stop is usually found during strut replacement, but it can also be diagnosed from the driver seat.
Bump stops are normally replaced together with the strut mount and dust boot, since all three share the same access procedure and a similar service life. Replace both sides of an axle at the same time, use a proper spring compressor, and torque suspension fasteners with the car at normal ride height. Compare the old elastomer part against the new item before installation to confirm the three dimensions match.
No. The bump stop and the strut mount are separate components in the same assembly. The mount carries load into the body and contains the bearing; the bump stop is the elastomer element that limits compression travel. They are often replaced together, but they are not interchangeable.
Yes, provided the dimensions match the original. Polyurethane is a direct replacement material for this application, and the fitment decision is driven by bore, outer diameter, and free length rather than by material alone.
Where a catalogue mould already matches your drawing, the OE reference is enough. Where the profile, hardness, or length differs, the part can be produced to your sample or drawing under an OEM programme. Send the drawing with the target annual volume for a specific quotation.
Quoted delivery is 15–30 days for stock-referenced items, with export packaging prepared for sea or air freight. Confirm the shipping method and destination port so the quotation reflects the right terms.
If you are sourcing front strut bump stops for Volkswagen applications, or need a custom-moulded stop to your own specification, send us the OE number, vehicle platform, and annual volume. We can confirm availability, provide dimensional data, and quote on neutral export packaging or private-label terms.
