VW Rear Strut Bump Stop OE 1K0511353F for Golf Jetta Octavia II | PU

The OE 1K0511353F is the rear coil spring bumper, catalogued by VW dealers as Stop Buffer, for the 1K generation rear axle introduced with the Golf V. Aftermarket catalogs use the names rear strut bump stop, suspension bumper and jounce bumper for the same piece. Bonpora molds this profile as part number 4110024 in polyurethane, with a 14.5 mm bore, a 78.7 mm outer diameter across the oval skirt and a 118 mm free height. The part is produced in China, covered by a 1 year warranty, shipped in neutral export packaging within 15 to 30 days, and supported with OEM and custom design service.

What makes this number worth a closer look is the suffix system behind it. The base number 1K0511353 covers several stop heights, and the F variant is the 118 mm oval stop catalogued for sports-suspension and all-wheel-drive builds of the same cars that carry a 133 mm round stop elsewhere. Dealer listings split usage further by VIN ranges and production dates. The sections below group what a purchasing desk normally checks: specifications, model coverage with PR codes, the height variants inside the family, cross references, and sourcing terms.

What the Stop Buffer Does on the 1K Rear Axle

The bumper slides over the piston rod of the rear shock absorber and engages a cap at the end of the travel. Under normal load the coil spring carries the weight and the buffer does nothing. When a deep pothole or a fully loaded trunk compresses the spring toward coil-bind, the buffer becomes the final cushion and prevents the metal-to-metal contact that would damage the damper seal. febi describes the duty directly: bump stops protect the shock absorbers and the whole suspension under very heavy loads.

Fitting Position and Quantity

The F variant belongs to the rear axle only, one piece per side. febi lists the fitting side as rear axle both sides, SASIC files it as Rear Axle, and the genuine assembly diagrams show it at position two of the rear suspension on each side. Workshops therefore quote two pieces per car and renew both sides together so the dampers keep matched travel limits.

Specifications of Bonpora 4110024

The catalogue values around this profile differ slightly by brand. febi 39011 records the height as 117 mm and the weight as about 0.08 kg, Borg and Beck kit data lists the stop at 116 mm, and the VW dealer catalog headlines the piece as 118 MM. The skirt is oval, so the outer diameter changes with the measuring section, which is why the Bonpora drawing notes 78.7 mm across the widest point. When two listings look close, confirm by drawing or sample rather than by the catalog number alone.

Which Models Use the 118 mm F Variant

The OE cross list for 1K0511353F stretches across the 1K generation and its export names. VW files the same stop under Golf, Jetta, Bora and Vento, the estate lines, the Brazilian Saveiro pickup, the Skoda Octavia II and the Audi A3 Cabriolet. SASIC sums the engine spread as 1.4 to 3.2 litres and 75 to 265 hp, from the 1.4 economy builds to the R32 with its 3.2 V6 and all-wheel drive. The table below condenses the genuine catalog rows.

PR Codes, VIN Windows and Production Cutoffs

The dealer catalog rows show that model and year alone do not settle the choice. Golf rows carry the rear-suspension PR codes 1JC and 1JK, the Audi A3 Cabriolet rows carry UA1 and UA5, and the Jetta, Bora and Vento sedan rows close at VIN 1K-8-020 816. Production dates cut in as well: Octavia II rows end at the start of May 2006, and Golf 2009-2011 rows end at 27 April 2009. Topran files the 118 mm F stop for vehicles with sports suspension, while its 133 mm M listing maps to PR 1JA, the standard rear suspension. febi, for its part, lists the Golf 6 only in the 4motion version for this stop, which matches the dealer note W/AWD and the R32 rows. The routine stays the same: read the number on the old part first, then confirm the PR code or the VIN.

The Saveiro Long Run

One row deserves separate attention. The Brazilian Saveiro pickup appears in the OE cross list from 2010 through the 2025 model rows, and febi carries the 5U type code as well. The same 118 mm oval stop therefore serves twenty-year-old Golf V wagons and current Saveiro production: one SKU covers both the European aftermarket and a South American line still running today.

One Base Number, Four Heights: F, M, S and R

Inside the 1K0511353 family the suffix carries the engineering difference. Four heights are catalogued across the European aftermarket, and they are not interchangeable. The values below come from the Topran, MEYLE and febi listings for each suffix.

F and M Side by Side

The F and M stops are the pair buyers most often confuse. F measures 118 mm with an oval skirt and is catalogued for sports suspension and the all-wheel-drive rows, while M measures 133 mm with a round skirt for the standard 1JA build. A 15 mm height gap plus a different skirt shape means the wrong part either engages the travel limit early, holding the rear axle high and making the ride harsh, or engages late and lets the damper bottom out. The suffix on the old part is the check that matters.

How Trade Buyers Search and Source This Part

Part Type Plus Specification

Common queries combine the function with the dimensions: rear bump stop 118 mm, VW oval rear bumper 78 mm, or jounce bumper with a 14.5 mm bore. The F profile answers this group directly, and the drawing values above let buyers match by dimension before they match by number.

Part Type Plus OE Number

Most professional buyers search the OE number itself: 1K0511353F cross reference, 1K0 511 353 F equivalent, or febi 39011 alternative. Quote pages that carry the full cross-reference table convert these searches without a follow-up email.

Vehicle Model Plus Part

Workshop buyers search Golf V rear bump stop, Jetta A5 rear strut bumper, Octavia II rear buffer or Saveiro bump stop. Catalogs that name the model codes and explain the PR and VIN logic answer these queries on the first visit.

Supplier, Factory and Custom Sourcing

Distributors searching polyurethane bump stop manufacturer or private-label jounce bumper supplier need production terms: material grades, tooling options, neutral packing and delivery windows. Bonpora covers catalog orders and fully custom profiles through its custom parts service, including original-replacement runs made to a customer drawing.

Cross-Reference Numbers for the F Variant

Procurement teams usually compare quotes through the aftermarket numbers below. All of them point to the same rear buffer profile.

Kit Listings Versus Single Buffers

A second product group hides behind the same OE number. SACHS 900 137, MEYLE 100 740 0011, BOGE 89-137-0, Borg and Beck BPK7080 and AUTOFREN SEINSA D5223 are filed as protection or dust-cover kits, each combining the bellows with the stop; Borg and Beck data lists a dust protection height of 179 mm next to the stop height of 116 mm. The VW rear bellows itself appears as 1K0513425 in the assembly diagrams. Quote kits and single stops separately so the comparison stays like-for-like.

Polyurethane Compared With Rubber

The genuine part and the main European aftermarket brands describe this family as a polyurethane bumper, and febi lists the material for 39011 as PU. Polyurethane resists compression set better than filled rubber, so the stop keeps its height after years of repeated impacts instead of collapsing into a low ring that no longer protects the damper. It also tolerates the heat and ozone exposure around the rear axle. For a fleet buyer the result is a more stable replacement interval and fewer returns caused by parts that have gone flat on the car.

Installation and Inspection Notes

Workshops normally renew the rear bumpers when the rear shocks are replaced, since a new damper behind an old collapsed bumper loses much of its benefit. Topran marks its 114 885 as a replace-in-pairs item. Symptoms that justify pulling the rear wheels for inspection include a deep clunk over sharp bumps, the rear sitting lower on its springs than before, or visible cracking and powder on the old stop. Because the F variant is tied to sports-suspension and all-wheel-drive rows, VIN-based confirmation remains the final step before fitting, particularly on R32 and 4motion cars. When refreshing the corner, quote the bellows and the upper mount at the same time.

Sourcing From Bonpora

Bonpora produces the 1K0511353F profile in China as part 4110024 in polyurethane, with a 14.5 mm bore, a 78.7 mm outer diameter across the oval skirt and a 118 mm free height. Orders ship in neutral export packaging within 15 to 30 days and carry a 1 year warranty. The same production line covers the wider program listed under polyurethane bump stops and related shock absorber parts, with chassis and suspension components available from the same supplier base. For customised heights, material grades or private-label packaging, send the drawing and the target quantity for a quotation.

Frequently Asked Questions

How do I confirm that 1K0511353F fits my car?

Check three points in order: the OE number on the old part, the rear-suspension PR code of the vehicle, and the model row in the table above. If the old stop carries 1K0 511 353 F, the codes read 1JC, 1JK, UA1 or UA5, and the car is a Golf V, Jetta A5, Octavia II, A3 Cabriolet or Saveiro build inside the listed windows, the fitment is direct. For Jetta, Bora and Vento sedans, confirm the VIN sits before 1K-8-020 816.

What is the difference between 1K0511353F and 1K0511353M?

Height, skirt shape and intended suspension. F measures 118 mm with an oval skirt and is catalogued for sports-suspension and all-wheel-drive rows, while M measures 133 mm with a round skirt for the standard 1JA build. They are not interchangeable: the wrong height either limits damper travel or engages too early.

Do I need one piece or two per car?

Two. The same number fits the rear left and right damper, the dealer catalog lists each side separately with a quantity of one, and suppliers recommend replacing both sides at the same time so the travel limits stay matched.

Why do catalogs list different heights for this part?

Measurement basis. The dealer catalog headlines 118 mm, febi records 117 mm, and Borg and Beck kit data lists 116 mm, because suppliers measure at different sections of the oval skirt and at different preload states. Treat 116 to 118 mm as one profile and confirm the final dimension by drawing or sample before a large order.

Request a Quotation

Send the OE number 1K0511353F, the annual quantity and any packaging requirement, and the sales desk will return a quotation with delivery terms for the 4110024 profile. Custom heights and material grades are quoted from a drawing or a sample.