sales@bonporaparts.com
0086-10-64988621
English
The rear axle of the Volkswagen Passat B6 generation carries a heavy share of daily driving work on European and export market roads alike, and the strut bump stop is the small component that protects the damper when suspension travel reaches its limit. The 3C0511359B strut bump stop, produced by Bonpora under reference 4110026 in microcellular polyurethane, is a regular item in wholesale orders from parts importers, aftermarket brands and repair chains. This guide explains the function of the part, the full specification of the Bonpora version, fitment notes for Volkswagen platforms, and the sourcing routes available to buyers who search by OEM number, by part type and specification, by vehicle model, or by custom design requirement.
A strut bump stop, also known as a jounce bumper or auxiliary spring, is mounted on the piston rod of the shock absorber or strut, usually inside the dust cover. When the suspension compresses beyond its normal travel, over potholes, speed bumps or with a full load of passengers and luggage, the bump stop engages and progressively absorbs the final stage of the stroke. This prevents metal to metal contact between the strut body and the chassis, protects the internal valves of the damper from overload, and keeps impact noise and harshness at an acceptable level.
The OE number 3C0511359B identifies the rear strut bump stop of the Volkswagen 3C platform family. Because the part is a wear related component, workshops normally replace it together with shock absorbers, dust covers and mounting kits, which keeps demand steady on the wholesale market. Bonpora keeps this reference in serial production with tooling ready for both OE specification and replacement grade, and buyers can review the complete polyurethane bump stop and jounce bumper range on this site.
The table below lists the key parameters of the Bonpora strut bump stop 4110026, which corresponds to OE number 3C0511359B.
| Item | Specification |
|---|---|
| Product Name | Strut Bump Stop |
| Bonpora Number | 4110026 |
| OE Reference | 3C0511359B |
| Fitment | Volkswagen |
| Dimensions | Φ15.3 x Φ62.6 x 118 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 smaller diameter of 15.3 mm slides over the damper rod, the larger diameter of 62.6 mm forms the working body, and the overall length of 118 mm defines the available travel cushion. Buyers should confirm these measurements on the removed part or in the vehicle parts catalog before placing a bulk order, because suffix versions within the same OE family can differ in length or foam density.
The 3C0 prefix of the OE number points to the Volkswagen 3C platform, best known as the Passat B6 generation. Related models built with the same rear suspension componentry may also list this reference in their parts catalogs, which is common across VW group platforms that share suppliers and subassemblies. Bonpora therefore recommends a fitment check against the original part before a large purchase, and the sales team can support this check with catalog data.
VW part numbers often carry a suffix letter, and the B at the end of 3C0511359B is such a case. Service versions with different suffixes can differ in length, diameter or foam hardness, so 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 accepts this verification routine 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 for reference 4110026, generally offers a finer and more uniform cell structure, which produces 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 operate within its designed range for a longer time.
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 an extended service interval. Hardness can be tuned through the formulation, which is valuable for tuning programs and heavy duty applications 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 3C0511359B and then narrow down by size, material and quantity. A clear request for quotation 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 pre production samples within a short time.
Bonpora covers the complete shock absorber parts category, including bump stops, dust covers, mounting kits and related rubber to metal components, so mixed container loading across categories is possible for wholesale orders. Buyers who work from vehicle applications rather than OE numbers can simply send the model, the year and the axle position, and the engineering team will map the request to a current reference.
Beyond serial catalog 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. 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 begins.
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 for agreed volumes. 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 rear suspension of the VW 3C platform family, best known as the Passat B6 generation. Related models that share the same rear suspension componentry may list the same reference, so buyers should verify the OE number in the parts catalog and compare the dimensions of the old part before ordering.
Yes. The 3C0511359B bump stop is kept in serial production for wholesale supply to importers, aftermarket brands and repair chains. Volume pricing, mixed container loading with other suspension parts and buyer branded packaging are available, and the sales team confirms commercial terms after the quantity review.
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 before mass production.
Standard delivery time is 15 to 30 days after order confirmation, depending on quantity and production schedule. Goods are packed in neutral export packaging suitable for sea and air freight, and a 1 year warranty covers defects in material and workmanship when the part is installed and used as intended.
If you are sourcing the 3C0511359B strut bump stop for the Volkswagen Passat B6 platform or planning a custom polyurethane bump stop program, send the OE number, the dimensions and the target quantity to the Bonpora sales team. A quotation with lead time, packaging options and sample arrangements is returned shortly after the specification review.
