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The Porsche Macan strut bump stop is the progressive cushion mounted on the rear shock absorber rod. It compresses during the final part of suspension travel and keeps the damper, the top mount, and the chassis from meeting metal to metal. This page covers the bump stop with OE reference 95B 512 131 D (95B512131D), also listed as 95B.512.131.D and 95B-512-131-D, and Bonpora No. 4110196: a polyurethane rear axle stop produced in China for the Porsche Macan 95B. The sections below explain how the part works, confirm which Macan variants it fits, list the dimensions and material, show how to source by OEM number, describe wholesale supply from a Chinese auto parts factory, outline the OEM and custom design programme, and add fitting notes for importers, distributors, European specialists, and workshops buying Macan suspension parts in volume.
The Macan runs a multi-link rear axle with a separate coil spring and a separate shock absorber. In normal driving the spring carries the vehicle weight while the damper controls how quickly the body moves over the road. When a rear wheel drops into a deep pothole, crosses a kerb at an angle, or takes a heavy load through a fast compression, the available travel is used up in an instant. At that point the bump stop is compressed between the damper rod and the body of the shock absorber. Polyurethane compresses along a progressive curve, so the part behaves as a secondary spring: soft on first contact, then progressively firmer. That staged ramp takes the final phase of the impact and shields the damper rod, the piston, the top mount, and the surrounding body structure from a hard bottom out.
On a two tonne SUV the rear stops work harder than the equivalent part on a saloon car. A loaded Macan, a car used for towing, or one driven with a full boot over broken road surfaces will compress the rear stops far more often. Once the buffer cracks, crumbles, or takes a permanent set, the damper reaches the end of its stroke unaided. Drivers report a sharp knock from the rear over expansion joints, a sudden harshness under load, and body movement that no longer settles after a bump. Because the stop sits behind the dust boot on the damper rod, many worn units are only discovered when the shock absorber is removed for another job. On the Macan the rear stop is a common renewal item alongside the protection boot, the top mount, and the spring seat.
The reference 95B 512 131 D belongs to the rear axle of the 95B Macan. In the Porsche numbering system the digits 512 identify a rear axle shock absorber component, while the 412 series with the same trailing number identifies the front axle counterpart. That is why 95B 512 131 D and 95B 412 131 D are different parts with different dimensions and must not be interchanged. Before ordering, buyers should always confirm the axle position from the vehicle rather than from a model name alone.
The 95B Macan was produced with three suspension specifications, and each one uses a different rear rubber stop. The PR code on the vehicle data sticker identifies which specification the car left the factory with.
Catalogue listings describe 95B 512 131 D as fitting the Macan with standard suspension plus PASM and note that it is not the part for the GTS and Turbo air suspension cars. Sending the VIN or a photograph of the vehicle data sticker removes almost all ambiguity before a quotation is prepared.
| Parameter | Value |
|---|---|
| Product Name | Strut Bump Stop |
| Country of Origin | China |
| Bonpora Nos | 4110196 |
| OE | 95B512131D |
| Fitment | Porsche |
| Size | Φ20xΦ62x120 |
| Material | Polyurethane |
| Warranty | 1 Year |
| Delivery Time | 15-30 Days |
| Packaging | Neutral Export Packaging |
| Custom Service | OEM & Custom Design Support |
The size listing Φ20 x Φ62 x 120 mm describes a long rear stop: a 20 mm bore that slides over the damper rod, an outer diameter of about 62 mm, and a free length of 120 mm. On an SUV rear damper the free length is critical. A stop that is too long preloads the suspension, reduces available travel, and can raise the rear ride height, which changes the attitude of the car and the load on the rear axle. A stop that is too short lets the damper bottom out early and transfers the impact straight into the top mount and the body. Because Porsche specified different stops for the 1BA, 1BH, and 1BK suspensions, and because damper details changed across the production life of the 95B, measuring the removed original part and comparing bore, free length, and outer profile against the catalogue entry remains the safest way to confirm a match.
Polyurethane is chosen ahead of ordinary foam or natural rubber because it resists oil, ozone, road salt, and constant compression cycling far better. It holds its shape under sustained load and stays consistent in hot, humid, and cold climates, where foam buffers tend to crumble early and low grade rubber takes a permanent set. For a distributor selling into the Porsche aftermarket, where a customer expects a rear suspension refresh to last, the longer service life of polyurethane also means fewer warranty claims and more stable repeat demand on the same part number.
Sourcing by OEM number is the most reliable route when the original marking is still legible. Porsche prints the number in the 95B 512 131 D format, and the same reference also appears in catalogues as 95B512131D, 95B-512-131-D, and 95B.512.131.D. All four identify one Bonpora No. 4110196, so distributors and repeat buyers can reorder a single known specification without checking drawings for every order. For mixed orders that span several systems, the polyurethane bump stops range groups references by system and by vehicle model, which shortens the quotation workflow considerably.
If the OE number has worn away, identify the part from vehicle data instead: model year, engine, suspension specification from the PR code, and axle position. A photograph of the removed part beside a steel rule, together with the VIN, lets the supplier confirm the match before shipment. Workshops and specialists that service several Macan generations can consolidate their bump stop stock under Bonpora numbers, keeping one part code per application and simplifying reordering across a mixed customer base.
This bump stop is manufactured in China for wholesale distribution. It runs as a catalogue item, which means tooling already exists, dimensions stay stable between production batches, and pricing is structured for carton, pallet, and container quantities rather than single piece retail. Typical buyers include Porsche specialists and independent workshops, European and North American importers of suspension and rubber components, distributors serving the premium SUV aftermarket, and online sellers who need a dependable source for a fast moving Porsche reference. The chassis and suspension parts range from the same production site covers the companion items usually renewed at the same time, such as dust boots, top mounts, and spring seats, so a container can be built around complete rear axle refresh kits instead of single references.
Orders ship in neutral export packaging by default, so goods arrive ready for relabelling under the own brand of the distributor. Delivery time is 15 to 30 days depending on order volume and production scheduling, and the warranty period is 1 year. For first time customers, sample quantities can be arranged before a bulk commitment, so fitment can be verified on a real vehicle before the container is booked.
Each production batch is checked for free length, bore, outer profile, and material hardness. Visual inspection covers flash, voids, and surface defects that could lead to early cracking in service. Dimensional records are kept per batch, so repeat orders match the approved sample rather than drifting over time. That batch level traceability is one of the reasons the part can be offered with a 1 year warranty for export markets, and it lets a distributor answer technical questions from workshops with confidence.
Beyond the catalogue part, the same production line supports OEM and custom design work. Available options include tailored polyurethane hardness, adjusted free length, bore, or outer profile, coloured material for brand recognition, branded packaging, and private label marking. Tuners who prepare lifted or load carrying Macan variants sometimes request a firmer compound to suit a specific damper and spring combination, while distributors building a rear axle kit usually combine several references in one shipment to reduce freight cost per unit. For a custom project, send a drawing or a physical sample together with the expected annual volume. Tooling and sampling lead times are quoted separately from mass production, and a first article sample is normally supplied for fitment confirmation before the production run starts. Buyers working on a broader programme of rebound bumpers and suspension buffers can place related references in the same order.
Replace rear bump stops in pairs, one for each side of the axle, and inspect the protection boot, the top mount, and the spring seat at the same time. A collapsed or crumbling stop usually indicates that the damper has been bottoming out, so check the shock absorber for fluid loss before refitting, and replace the protection boot if it is split. On the Macan 95B the rear damper and spring are separate units, which means the stop can be reached without dismantling the whole rear suspension, but the damper still has to be released from its upper and lower mountings. Torque the fasteners to the figure given by Porsche for the specific model year and suspension type, and confirm that the stop is fully seated on the rod before the wheel goes back on. A wheel alignment after reassembly is standard practice on these cars.
A polyurethane stop should seat flat on the rod shoulder. If it does not sit flat, it will wear unevenly and may generate noise within a short mileage. Because the buffer works behind the protection boot, a light coating of the grease specified for the application makes future removal easier and reduces the chance of squeaking. When the car is used for towing or regularly driven with a heavy load, the stops should be inspected at every damper service, since repeated hard compression accelerates wear.
Catalogue listings for 95B 512 131 D cover the Porsche Macan 95B with steel spring suspension and PASM, which corresponds to PR code 1BH. That group includes the Macan 2.0 litre, the Macan S 3.0 litre, and the 3.0 litre diesel from the 95B.1 generation, and the 2.0 litre and Macan S from the 95B.2 generation. It is not the listed part for the GTS and Turbo models built with air suspension. Confirm the application by model year, engine, axle position, and the suspension PR code, or send the VIN for a precise match before ordering.
Typical signs are a sharp knock from the rear over expansion joints and potholes, a sudden harshness when the car is loaded or towing, and visible cracking, crumbling, or permanent compression of the old stop. Because the stop sits on the damper rod behind the protection boot, it should be inspected whenever a rear shock absorber is removed. If the damper has been bottoming out, check for fluid seepage at the same time, since a failed buffer often shortens damper and top mount life.
All of these names describe the same component. Porsche parts catalogues often list it as a stop buffer or jounce bumper, while the aftermarket and workshop trade generally call it a bump stop, strut bumper, or shock absorber rubber stop. In the Porsche numbering system the 512 series covers the rear axle, and the 412 series covers the front axle, so always check the middle digit group as well as the trailing number.
Yes. OEM and custom design support is available, including adjusted polyurethane hardness, modified bore, free length, or outer profile, coloured material, and private label packaging. Send a drawing or a sample together with the target annual volume to receive a quotation and a sampling schedule.
Delivery time is typically 15 to 30 days depending on quantity. Packaging is neutral export packaging by default, with branded options available on request, and the warranty period is 1 year. Sample quantities and mixed container loading with other Porsche suspension parts can be arranged for new customers.
Send the OEM number 95B512131D, the Bonpora number 4110196, the quantity, and the destination port, and the sales team will confirm specification, packing, and delivery schedule. Buyers comparing several sources can review the full auto parts line, which covers suspension, steering, and rubber components from the same factory under one catalogue.
