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Toyota and Lexus models are known for long service life, and suspension components carry a large share of that reputation. The 48341-32053 strut bump stop sits on the damper rod of the front strut and cushions the final stage of compression travel before metal parts can contact each other. Bonpora manufactures this reference and a broad family of similar bump stops in microcellular polyurethane, supplying OE programs, importers, wholesalers and aftermarket brands from production bases in China and Germany. This guide summarises the specifications, fitment, material advantages and sourcing routes for buyers who search by OEM number, by part type and specification, by vehicle model, or by custom design requirement.
A strut bump stop, also called a jounce bumper or auxiliary foam spring, is mounted on the piston rod of a shock absorber or strut assembly. When the suspension compresses beyond its normal travel, over potholes, speed bumps, washboard roads or with a heavy load on board, the bump stop engages and progressively absorbs the last part of the stroke. This prevents metal to metal contact inside the strut, protects the internal valves and seals of the damper from overload, and keeps impact noise and harshness at an acceptable level.
The 48341-32053 part number belongs to the Toyota front suspension bump stop series, the group that Toyota catalogs under front spring bumpers. Because it is a wear related component, workshops normally replace it together with shock absorbers, dust covers and mounting kits during suspension service. For distributors and repair chains, stable supply of this reference is a recurring purchasing task. Bonpora therefore keeps the part in serial production with tooling ready for both OE specification and replacement grade, and buyers can browse the full polyurethane bump stop and jounce bumper range on this site.
The table below lists the key parameters of the Bonpora strut bump stop 4110216, which corresponds to OE number 48341-32053.
| Item | Specification |
|---|---|
| Product Name | Strut Bump Stop |
| Bonpora Number | 4110216 |
| OE Reference | 48341-32053 |
| Fitment | Toyota / Lexus |
| Dimensions | Φ21.4 x Φ56.2 x 83.5 mm |
| Material | Polyurethane |
| Country of Origin | China |
| Warranty | 1 Year |
| Delivery Time | 15-30 Days |
| Packaging | Neutral Export Packaging |
| Custom Service | OEM and Custom Design Support |
Dimensions follow the standard convention for strut bump stops: the small diameter slides over the damper rod, the larger diameter forms the working body, and the overall length defines the travel cushion. The relatively short free length of 83.5 mm indicates a compact design for struts with limited rod exposure, so a part from a different series with the same OE prefix cannot be assumed to fit. Buyers should confirm the measurements on the removed part or in the vehicle parts catalog before ordering.
References in the 48341-320xx group are widely listed for Toyota body-on-frame platforms, the truck based SUVs and pickups where front struts work hardest. Toyota and Lexus share many suspension components across sister models, so the same bumper shape can appear under related references in both catalogs. Because Toyota assigns suffix digits for running changes in foam density and length, a fitment check against the original part is recommended before a bulk purchase.
Toyota catalogs may list the reference with or without suffix digits, and service versions can differ in length or foam density. The most reliable method is a three way check: the OE number from the parts catalog, the physical dimensions of the old part, and a photo of the mounting position. Bonpora supports this verification and can send samples for confirmation before mass production.
Traditional bump stops rely on NR or SBR rubber foams. Microcellular polyurethane, the material class used by Bonpora, generally offers a finer and more uniform cell structure, which gives a more progressive force stroke curve. In practical terms the cushioning builds up gradually instead of sharply, which supports ride comfort and helps the damper work within its designed range. On truck based Toyota and Lexus platforms the bump stop engages frequently under payload, towing and off road compression events, so a progressive cushion has a direct effect on comfort and damper life.
Polyurethane also shows advantages in aging behaviour. It resists ozone attack, common road chemicals and repeated compression cycles better than many rubber compounds, so the part keeps its shape and elasticity over a longer service interval. Hardness can be tuned through the formulation, which is valuable for loaded vehicle programs where a firmer progressive cushion is requested. These advantages depend on correct material selection and process control, and Bonpora manufactures under an IATF 16949 certified quality system to keep batch consistency stable.
Professional buyers usually start from an OE number such as 48341-32053, then narrow down by size, material and quantity. A clear RFQ contains the OE reference, the dimensions, the required material grade, the annual volume and the packaging requirement. With this information a manufacturer can confirm tooling, quote accurately and prepare samples in a short time.
Buyer search behavior in this category follows clear patterns: part type plus specification, for example polyurethane strut bump stop 21.4 x 56.2 x 83.5 mm; part type plus supplier, such as strut bump stop manufacturer for Toyota and Lexus; part type plus OEM number, such as 48341-32053 bump stop; vehicle model plus part; and custom supplier searches for project based procurement. This article is structured so that each of these entry points leads to the same specification table and the same contact route, which shortens the path from search to quotation.
Bonpora covers the complete shock absorber parts category, including bump stops, dust covers, mountings and related rubber to metal components, so mixed container loading across categories is possible. Buyers who work from vehicle applications rather than OE numbers can send the model, year and axle position instead, and the engineering team will map the request to a current reference.
Beyond serial references, Bonpora develops custom bump stops from drawings, samples or application data. The service covers material hardness adjustment, dimension changes, mounting features, logo printing and packaging design. For new projects the workflow is straightforward: the buyer provides a drawing or a sample, engineering confirms the force stroke requirement, tooling is produced in house, and samples are submitted for approval before mass production.
This custom suspension parts service is used by OE programs, tuning brands and aftermarket packagers who need a specific cushioning curve that standard catalog items do not provide. Tooling cost and lead time depend on part complexity, and the sales team issues a clear quotation after the drawing review.
Each production batch passes incoming material checks, in process dimension control and final inspection of appearance, hardness and compression behaviour. Parts are packed in neutral export packaging with inner bags and cartons suitable for sea and air freight, and buyer branded packaging is available on request. Standard delivery time is 15 to 30 days depending on quantity and production schedule, and every order is covered by a 1 year warranty against material and workmanship defects.
The reference belongs to the Toyota front strut bump stop series and is listed for several body-on-frame platforms shared across Toyota and Lexus sister models. Buyers should verify the OE number in the parts catalog and compare the dimensions of the old part before ordering, because suffix variants can differ in length and density.
Yes. Bonpora supports OEM and custom design, including size changes, hardness adjustment and logo or packaging customisation. Send a drawing or a sample, and the engineering team will confirm the proposal and submit samples for approval.
Standard delivery time is 15 to 30 days after order confirmation, depending on quantity. Goods are packed in neutral export packaging, and buyer branded packaging is available for agreed volumes.
Bonpora provides a 1 year warranty on the strut bump stop against defects in material and workmanship when the part is installed and used as intended. Claims are handled case by case with the sales team.
If you are sourcing the 48341-32053 strut bump stop or planning a custom polyurethane bump stop program, send the OE number, dimensions and target quantity to the Bonpora sales team. A quotation with lead time and packaging options is returned shortly after the specification review.
