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Hyundai strut bump stop buyers working from an OE number need three things at the same time: the right reference, consistent dimensions, and a supplier who can repeat the same part in the next shipment. The number 5537526000 covers a rear suspension bump stop used on Hyundai platforms, and it is carried in our catalogue as Bonpora Nos 4110176. This page explains the dimensions, the material choice, the inspection points, and how to order against the OE reference.
It is written for importers, distributors, and repair chains that already know the part number and want a dependable production partner rather than a catalogue listing alone.
A bump stop is a progressive elastomer buffer fitted on the damper rod. Under normal driving it stays out of contact. When the suspension compresses fully over a speed bump, a pothole edge, or a fully loaded rear axle, the buffer takes the last part of the travel and prevents metal to metal contact inside the strut.
On rear suspension layouts, the bump stop works together with the dust boot, the upper mount, and the spring. If the buffer has crumbled, drivers usually notice a harsh knock on compression, a harsh bottoming feel with passengers or cargo aboard, and dust entering the damper seal area. Those are the field complaints that drive replacement demand.
| Parameter | Value |
|---|---|
| Product name | Strut Bump Stop |
| OE reference | 5537526000 |
| Bonpora Nos | 4110176 |
| Fitment | Hyundai |
| Outside diameter | 54.7 mm |
| Inner bore | 11.2 mm |
| Free length | 90.3 mm |
| Material | Polyurethane |
| Warranty | 1 year |
| Delivery time | 15-30 days |
| Packaging | Neutral export packaging |
| Custom service | OEM and custom design support |
The figures above should be checked against the original part on the vehicle before a bulk order. The 11.2 mm bore suits a specific rod diameter, and the 90.3 mm free length is the relaxed height, not the installed height. When a counter sample is available, comparing free length and bore is the fastest way to confirm the reference.
The bore controls how the buffer sits on the damper rod. Too loose and the part can migrate or rattle. Too tight and assembly on the line becomes slow and the buffer may split at the seam. Free length controls how early the buffer starts to work. A shorter buffer changes when the bump stop engages, which the driver feels as a change in ride harshness under load. These two dimensions are the ones we check first on every incoming inspection.
| Property | Polyurethane | Conventional rubber |
|---|---|---|
| Load capacity at the same volume | Higher | Lower |
| Resistance to oil and ozone | Good | Moderate |
| Compression set after long service | Lower | Higher |
| Consistency batch to batch | Tight, mould controlled | Depends on compound mixing |
| Behaviour across temperature range | Stable within design window | Can harden in cold climates |
Polyurethane is used for this part because it holds a progressive spring rate over a long service interval and resists the oil mist and road ozone that reach the damper area. The compound is selected for the load band of the Hyundai rear suspension rather than as a general purpose material.
Searching by OE number is how most professional buyers work. Send us the reference 5537526000, the quantity, the destination port, and any packing instruction, and we match it against Bonpora Nos 4110176 and the mould record. If the vehicle uses a superseded reference, tell us the model year and the position on the car so we can cross check the fitment.
Buyers commonly reach a supplier through one of five search routes: part type plus specification, part type plus supplier, part type plus OEM reference, vehicle model plus part name, and custom part plus supplier. A search such as strut bump stop 11.2 mm bore or Hyundai strut bump stop 5537526000 should land on a page that states dimensions, material, and the OE reference clearly. If a supplier cannot publish those three items, the risk of a wrong shipment rises sharply.
Every production lot is checked on dimensions, hardness, appearance, and compression behaviour. Bore and free length are measured on a sample basis with callipers and a height gauge. Hardness is verified with a durometer, and the values are compared with the reference range for the compound. Compression testing confirms the progressive rate does not fall outside the design band.
Packing is neutral export packaging unless the buyer requests private label cartons. Cartons are labelled with the part reference and quantity so that warehouse staff can receive the goods without opening every box. Loading is supervised, and photographs of the packed pallets and the container interior are sent before departure when the buyer asks for them.
Yes. Both references point to the same polyurethane strut bump stop described on this page: 54.7 mm outside diameter, 11.2 mm bore, 90.3 mm free length, Hyundai fitment. You can quote either number in your enquiry and we will cross check against the mould record before production starts.
Yes. We support OEM and custom design work, including private label cartons, printed poly bags, and labels showing your part number. Send the artwork and the required carton dimensions with the order so the packing specification can be confirmed before the run begins.
The bump stop is the elastomer buffer that limits suspension travel. The dust boot is the flexible sleeve that protects the damper rod and seal from grit. On many Hyundai struts the two are combined into one moulded component, and both functions must remain intact for the damper to last.
Standard production and delivery time is 15 to 30 days after order confirmation, depending on quantity and mould availability. Goods ship in neutral export packaging from China to your nominated port. Air freight is available for urgent sample quantities. Container loading and shipping documents are arranged after the inspection report is approved.
Buyers working on Hyundai suspension usually order more than one buffer at a time. Review our polyurethane bump stops range for the full elastomer buffer catalogue, see shock absorber parts for mounts, boots, and dust covers, and read custom parts for private label and drawing based production. If your workshop stock list also covers other models, tell us the platform and we will suggest the matching references.
Send the OE number 5537526000 or Bonpora Nos 4110176 with your quantity and destination port. Our team returns pricing, carton dimensions, gross weight, and the production schedule so that you can plan the order against your own delivery commitments. Sample evaluation is welcome before the first bulk order.
