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When a Honda CIVIC crosses broken pavement or a speed bump, the strut bump stop is the part that decides whether the damper survives the hit. OE 51722-TET-H01 is the polyurethane jounce bumper specified for that platform, and for importers, distributors and chain workshops it is a steady reorder line. This page sets out the technical data of 51722-TET-H01, the vehicles it fits, the symptoms that point to a tired bumper, and the ways purchasing teams normally source it: by OE number, by vehicle model, or through a custom development programme.
A strut bump stop, also written as jounce bumper, buffer or strut bumper, is mounted on the piston rod of a front or rear strut, normally inside the dust boot. Under normal driving it stays clear of the strut mount. Under a hard compression event it acts as the last spring in the system: it absorbs the final part of the suspension travel and prevents the damper from bottoming out metal to metal.
Because the material is progressive, the force it adds rises steeply as it compresses. That gives the chassis a controlled end stop instead of a sudden impact, which protects the strut, the top mount and the body structure.
On the CIVIC platform the bumper works together with the strut mount bearing, the dust cover and the coil spring. A collapsed bumper changes the load path into the mount, so it is common to see a worn bump stop and a noisy top mount diagnosed in the same job. When suspension components are bought in volume, checking these items as a set helps reduce comeback rates in the workshop.
Traditional jounce bumpers were made of rubber. Microcellular polyurethane has largely replaced them because it can be moulded to a defined density gradient, holds its shape after repeated compression and resists ozone, oil and road salt. It also tolerates the higher loads of current, stiffer suspension layouts. The trade-off is that formulation and moulding control matter: two bumpers that look identical on a drawing can behave differently if density and cell structure are not controlled. That is why buyers of polyurethane bump stops normally ask for batch-level inspection records rather than a single sample.
The figures below are the control values for this part number. Dimensions are moulded values, measured before installation.
| Parameter | Value |
|---|---|
| Product name | Strut bump stop / jounce bumper |
| OE number | 51722-TET-H01 |
| Bonpora No. | 4110097 |
| Fitment | Honda CIVIC |
| Size | Φ25.25 x Φ70 x 78 mm |
| Material | Polyurethane (PU) |
| Country of origin | China |
| Warranty | 1 year |
| Delivery time | 15-30 days |
| Packaging | Neutral export packaging |
| Custom service | OEM and custom design support |
Read the size notation as an inner bore of 25.25 mm, an outer diameter of 70 mm and an overall height of 78 mm. Confirm these three dimensions against the strut being serviced: a bumper that is oversized at the bore will not seat correctly on the piston rod, and one that is too short will not control travel as intended.
The fastest route is the OE reference. A search for 51722-TET-H01 or for the Bonpora reference 4110097 returns the exact item without ambiguity. Importers who keep a cross-reference database usually map the OE number to their own internal SKU, so a quotation can be issued in minutes rather than hours.
The second route is model-based: Honda CIVIC, then year and trim. This helps when the customer has no part number, but it should be treated as a first filter rather than a final answer, since one badge can cover more than one suspension specification. A third route is cross-referencing aftermarket or competitor numbers. When two references disagree, trust the dimensions over the catalogue description.
Before ordering, inspect the removed bumper for the moulded OE marking, measure the bore and photograph the strut rod end. It takes a couple of minutes and avoids the most common return reason in suspension parts: a correct-looking bumper with the wrong bore or height.
No single sign is conclusive. A bumper is best judged as part of the strut assembly, and replacing it during a shock absorber overhaul is usually cheaper than a separate strip-down later. Buyers who also stock shock absorber parts can offer the complete repair instead of a single line item.
Standard production runs follow the published 15-30 day delivery window, and neutral export packaging is available so cartons can carry your own label. Carton and pallet configuration is agreed before the order is released, which keeps container loading predictable. To test fitment before committing to a full run, request a sample set with the batch inspection record attached.
Beyond the catalogue part, polyurethane components can be adapted: density and stiffness changed for a heavier vehicle, height trimmed for a lowering spring, or a new bumper developed from a drawing or a used sample. Tooling for a new mould is normally the main cost driver, so it makes commercial sense when a programme runs over several seasons. What can be modified is summarised under custom parts.
A supplier that answers these five points without prompting is normally one that controls its own moulding rather than trading from stock.
It is used on Honda CIVIC suspension struts. Whether a given vehicle needs it at the front or the rear depends on the suspension specification, so confirm with the strut position and the bore dimension rather than the model year alone.
Service life depends on road conditions and loading. In normal passenger car use a correctly specified polyurethane bumper is expected to outlast the damper it is paired with, but repeated heavy bottoming out will shorten it.
Yes. It can be changed without replacing the whole strut, although it is more economical to combine the work with a damper or mount replacement while the strut is already apart.
Custom dimensions, compound changes and customer-branded packaging are available subject to order volume and tooling. Send the drawing or a sample together with the expected annual quantity for a quotation.
If you are comparing suppliers for OE 51722-TET-H01, or you need a polyurethane bumper developed for another platform, send the OE number, the required dimensions and your target quantity. A BONPORA sales engineer will reply with product data, packaging options and an indicative lead time, so the line can be priced into your next buying cycle.
