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Skoda strut bump stop 6U9412303 is the front suspension buffer of the Felicia family, the small Skoda line that carried the Favorit and Forman into the mid 1990s and stayed in production until 2001. Bonpora manufactures the replacement as number 4110011 in micro-cellular polyurethane, following the drawing data of 18.1 mm bore, 55.2 mm outer diameter and 101 mm free height. Specialist dealers also list the same buffer under the legacy Skoda reference 115450330, so one cushion arrives in enquiries under two numbering systems. This page covers what the buffer does, where it fits, and how the two references relate.
Each front wheel of the Favorit, Forman and Felicia hangs on a MacPherson strut: a coil spring wrapped around a damper strut that also acts as the steering pivot. Under normal load the spring carries the body and the damper controls wheel movement. When the suspension reaches the end of its travel, on a deep pothole or a sharp kerb strike, the polyurethane cushion at the top of the strut compresses progressively. Its stiffness rises through the stroke, so the final part of the movement feels firm rather than harsh, and the damper internals never meet the body structure in a metal-to-metal impact.
A collapsed or missing buffer announces itself quickly. Workshops hear a hard clunk from the front over sharp impacts, notice the nose sitting lower when the car is loaded, and see dampers and top mounts wearing faster than they should. Because the buffer costs a fraction of the strut it protects, technicians normally renew it whenever front dampers or springs are replaced on these cars.
Specialist Skoda catalogues list 6U9 412 303 for the front shock absorbers of the Felicia range built from late 1994 to 2001, covering the 1.3, 1.3 MPI, 1.6 MPI and 1.9 D engines, and the same family includes the earlier Favorit hatchback and Forman estate. The catalogue note of 100 mm height for the combi version shows how the range separates height variants by body type: the load-carrying estate needs the taller progressive cushion. Some aftermarket listings extend the reference across the family and to Volkswagen derivatives of the era, so coverage differs between catalogues. The practical rule is unchanged: confirm the application against the VIN or, better still, against the removed buffer before committing to volume.
The published parameters for this replacement are summarised below.
| Parameter | Value |
|---|---|
| Product Name | Strut bump stop (front suspension buffer) |
| OE Number | 6U9412303 |
| Cross-reference (legacy Skoda number) | 115450330 |
| Bonpora Nos | 4110011 |
| Fitment | Skoda Favorit / Forman / Felicia, front axle |
| Nominal Size (Bonpora drawing data) | Φ18.1 × Φ55.2 × 101 mm |
| Position | Front axle, left and right |
| Material | Polyurethane (micro-cellular) |
| Country of Origin | China |
| Warranty | 1 year |
| Delivery Time | 15-30 days |
| Packaging | Neutral export packaging |
| Custom Service | OEM & custom design support |
Bonpora supplies this cushion inside a wider polyurethane bump stop programme that covers European, American, Korean and Japanese references, and every batch is checked for size and hardness before packing.
The drawing data of 18.1 mm bore, 55.2 mm outer diameter and 101 mm free height describes a medium-bore, long-travel cushion. The bore rides on the piston rod of the strut, the outer face seats against the body side of the assembly, and the tall column between them provides about one hundred millimetres of progressive travel, which the specialist catalogues round to 100 mm. A cushion of this height suits a light chassis that works for a living: the estate and pickup versions regularly ran near their gross weight, and a long travel keeps the final compression stage gradual.
Buyers replacing a flattened buffer should treat free height with care. Cellular material takes a permanent set after years of compression, so a used piece never reads the drawing height again. Compare new samples or catalogue values instead, and check that the bore slides snugly on the rod, because a loose fit wears the cushion off-centre and shortens its life.
This reference is a textbook case of a part that exists under two numbers. Skoda ran its own long-format part numbers before the full Volkswagen Group catalogue integration, and 115450330 is that legacy reference for the front strut buffer. After the platform entered the group catalogue system, the same part also appears in VAG format as 6U9 412 303, where 6U marks the Felicia platform code and the 4123 sequence places the part in the front axle suspension group. Aftermarket suppliers quote either number: some list both on one product page, others publish only the VAG reference, and older paper catalogues still circulate the legacy number.
For a wholesaler this is an opportunity rather than a problem: one stock line serves two enquiry streams, because every buffer built to the drawing fits whichever number the customer quotes. State the equivalence openly in offers and invoices, so bookkeeping and warehouse picking stay clean.
When a customer asks for 6U9412303 and the internal system stores 115450330, or the other way round, resolve the mismatch before quoting. Ask for the three drawing dimensions or a photo of the removed part, match bore, outer diameter and free height, and reply with both references printed side by side. Apply the same discipline to mixed containers: label cartons with both numbers to avoid questions at customs or the customer warehouse.
Wholesalers building mixed containers often order buffers by dimension, because one geometry can serve several references across brands. For this line the checklist is short: measure the bore that rides the damper rod, measure the outer diameter that seats against the body, and measure the free height on a new part. Compare the three figures with the drawing data above and confirm the material is micro-cellular polyurethane.
Two precautions keep the measurement honest. Never take the height of a flattened used cushion as the reference value, because years of compression leave a permanent set; use the catalogue height or a new sample instead. Also check where the buffer locates: an 18.1 mm bore suits a specific rod diameter, and a loose fit wears the cushion off-centre and shortens its life. If the original marking has worn away, send all three measurements to the supplier before the order is placed.
Ordering by the OE reference removes the ambiguity of model year ranges and body versions and is the fastest route for most trade buyers.
The buffers fitted at the factory were cellular rubber, and much of the aftermarket supply for this family is already listed in PU. Both materials do the same job, with different behaviour along the compression curve.
| Property | Cellular Rubber | Micro-cellular Polyurethane |
|---|---|---|
| Compression behaviour | Progressive, softer initial stage | Progressive, firmer late-stage support |
| Shape retention | Permanent set possible over time | Holds shape through repeated cycles |
| Ageing and ozone resistance | Cracking possible at high mileage | Generally strong |
| Oil and grease contact | Swelling possible | Better resistance |
| Typical market role | Original equipment material | Common replacement material |
Neither material is automatically better. Rubber remains fully serviceable, while polyurethane is chosen where firmer late-stage support and longer shape retention are wanted, and several aftermarket catalogues already list this reference in PU. Buyers who need a defined hardness receive the data sheet with the batch, and the shock absorber parts catalogue lists matching bump stops, dust covers and mounts for consolidated shipments.
Beyond catalogue supply, Bonpora runs a custom service for buyers who need their own part number, a modified geometry or branded packaging. Engineering starts from a dimensioned drawing, a physical sample or an existing reference such as this one, and adjusts bore, outer diameter, height and hardness to the application. Tooling is produced in-house, so sampling and revision cycles stay short. Options include customer part number marking, private label bags and cartons, and consolidated loading with other suspension lines; the custom parts page describes the process and the information needed for a quotation.
Suspension cushions work amid wide temperature swings, continuous compression cycles and contact with dirt and moisture, so batch control concentrates on the properties that decide service life. Incoming polyurethane is checked against specification, dimensions are sampled with calibrated tools, hardness is measured on every batch, and visual inspection covers pores, cracks and flash. Goods are packed only after the batch record is complete, keeping every shipment traceable.
Standard packing is a poly bag per piece with export cartons sized for stable pallet loading. Neutral export packaging is the default, which lets distributors sell under their own brand where regulations allow. Lead time is 15 to 30 days from order confirmation and samples usually ship sooner. Bonpora quotes ex-works, FOB and CIF terms and can consolidate these buffers with other Skoda and Volkswagen references to reduce freight cost.
Specialist catalogues list it for the front shock absorbers of the Skoda Felicia range built from 1994 to 2001, including the 1.3, 1.3 MPI, 1.6 MPI and 1.9 D engines, and the same family covers the Favorit and Forman of the preceding years. The 100 mm height note is linked to the combi estate version, and coverage of body variants differs between catalogues. Confirm the application against the VIN or the removed part before ordering in volume.
The nominal drawing data is an 18.1 mm bore, a 55.2 mm outer diameter and a 101 mm free height; specialist catalogues round the height to 100 mm for the combi version. Measure the removed part at the same points and request a sample where the figures are critical.
Yes. 115450330 is the legacy Skoda number for the front strut buffer, and 6U9412303 is the VAG-format reference used after the platform entered the group catalogue. Aftermarket suppliers quote either number, and both lead to the same cushion geometry, so offers and carton labels can carry the two references side by side.
Trial orders stay small: sample quantities and mixed trial shipments are accepted so buyers can verify fitment first. Production completes within 15 to 30 days depending on volume, ships in neutral export packaging and carries a 1 year warranty. OEM and custom design support is available for buyers who need their own branding or a modified design.
For prices, drawing data and samples for the 6U9412303 front strut buffer, send the reference, the quantity and the destination port to the Bonpora sales team. Quotations for stock items usually go out within one working day, and this line can be combined with other suspension references in the same shipment.
