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The rear strut bump stop 7P6512131B is the cushion that sits inside the rear coil spring of the Volkswagen Touareg II, the 7P generation built from 2010 to 2018. Volkswagen catalogues the number as Coil Spring Damper, Stopper, Buffer or Bumper, and lists it for both rear corners. Most importers arrive at it by searching the OE number, so this guide covers what the part does, which Touareg models it fits, how it differs from the earlier 7L number and what to confirm before quoting.
On steel-sprung Touareg 7P cars the rear axle carries a coil spring and a separate damper on each side. The buffer is mounted in the centre of the spring, riding on the spring seat, and it stays idle through normal suspension travel. Its work starts at the end of the compression stroke.
Load the rear of the car heavily, or drop a wheel into a deep pothole, and the coil spring approaches the limit of its travel. Without a buffer the coils would close on themselves and the axle would meet the body through solid metal. The 7P6512131B compresses progressively and turns that final impact into a controlled deceleration rather than a jolt through the floor.
A damper driven repeatedly to full compression sees loads it was never calibrated for, and its seals and valving take the strain. The buffer is the sacrificial part in that path: it costs less to renew than a damper and it adds a rising spring rate only at the end of the stroke, so normal ride comfort is unchanged. It also spares the rubber spring seat 7P0412103 and the underlay 7P0412375B that sit under and around it.
This is a rear axle component, one per side, and it is not handed: the same number serves both rear dampers. Volkswagen lists it for the Touareg II across the whole 7P production run, from the 2011 model year in North America and from 2010 in most other markets through 2017 or 2018.
| Model | Platform | Years | Position |
|---|---|---|---|
| Touareg II, 3.0 TDI / 4.2 TDI diesel | 7P5 / 7P6 | 2010-2018 | Rear, qty 1 per side |
| Touareg II, 3.6 V6 FSI petrol | 7P5 / 7P6 | 2010-2018 | Rear, qty 1 per side |
| Touareg II, 3.0 V6 TSI hybrid | 7P6 | 2011-2017 | Rear, qty 1 per side |
| Touareg II, 4.2 V8 FSI | 7P5 | 2011-2018 | Rear, qty 1 per side |
The Touareg II was sold with two rear suspension architectures. Steel-sprung cars run coil springs with separate dampers, and that is the application for 7P6512131B. Factory air-sprung cars use a complete air strut instead of a coil spring and damper pair, so they have no coil spring buffer at this position at all. Volkswagen qualifies the steel-spring market range with the PR codes 1BA, 1BE and 1BW, and later cars add GP0. Quote the rebuild code with the OE number.
The front axle of the 7P Touareg has its own buffer under a different number, and the rear damper, spring, spring seat, cover and the two mounting brackets 7P0512301 and 7P0512302 are separate items. A workshop refreshing the rear corners will normally order the damper, the buffer, the spring seat and the cover together.
The first-generation Touareg (7L, roughly 2002 to 2010) uses a different spring-centre buffer, catalogued under 7L0512131B, a polyurethane part of about 92 mm working height. It shares the concept but not the geometry: the 7L and 7P generations changed spring, damper and spring seat when the platform was replaced. Cross-referencing between the two families leads to a buffer that will not seat correctly inside the 7P spring.
The 7L family is widely cross-referenced in European catalogues to the Porsche Cayenne 955 and the first-generation Audi Q7 4LB because those cars shared the PL71 platform. That is a property of the earlier number, not of 7P6512131B, and it is a common source of wrong matches. Treat any look-up that offers this buffer for a Cayenne or an early Q7 as an error to be checked against the actual spring and damper.
The E revision 7P6512131E appears in the same position of the genuine exploded rear suspension view as the B revision, and catalogues list both for the 2010-2018 Touareg 7P parc. They belong to one 100 mm class of spring-centre buffer, and buyers should still confirm by measuring the removed part rather than assuming any letter will do.
Bonpora supplies this stop as 4110183 in polyurethane at the dimensions below. The figures are the fastest first filter when screening quotations: a buffer with the wrong bore will not sit on the spring seat properly, and the wrong height starts working too early or too late in the stroke.
| Parameter | Value |
|---|---|
| Product name | Strut bump stop / coil spring damper |
| OE reference | 7P6512131B (7P6 512 131 B) |
| Bonpora number | 4110183 |
| Fitment | Volkswagen Touareg II (7P5 / 7P6, 2010-2018) |
| Size | Φ20 mm bore x Φ62 mm outer diameter x 101 mm length |
| Material | Polyurethane elastomer |
| Axle / side | Rear, left or right (not handed) |
| Quantity per axle | 2 |
| Country of origin | China |
| Warranty | 1 year |
| Delivery time | 15-30 days |
| Packaging | Neutral export packaging |
Polyurethane foam holds its density and recovers its shape through thousands of full compression events, resists oil mist from the damper and tolerates road salt and temperature swings from -40°C to +90°C better than older rubber compounds. For a part whose job is defined-rate compression, stable density matters most.
Measure the bore, the outer diameter and the free length at several points. A service-worn buffer is usually shorter than nominal and may show permanent compression set, so a measurement noticeably under 101 mm does not automatically mean the wrong part. What it does tell you is whether the car is still on the original buffer or on an aftermarket replacement of unknown density.
A heavy thud from the rear over sharp dips, speed humps or when the car is loaded points to a buffer that has crumbled or collapsed. The sound is clearest at low speed, where the suspension has time to reach full travel. Chalky surfaces, fine cracks along the walls and visible shortening against nominal length all confirm a stop whose rate curve has drifted.
Shops normally renew the buffer whenever the rear dampers come off, and do both sides at once so the compression behaviour stays balanced across the axle. Because the part lives inside the spring, ordering the spring seat and cover at the same time avoids reopening the job a few months later.
The number suits volume trade: the Touareg II parc is spread across Europe, North America, the Middle East and Russia, it is a rear-axle pair item, and every damper or spring replacement creates a companion sale.
Send 7P6512131B with the other letters of the family, the model year, the engine variant and the suspension type. A supplier who comes back asking for the bore, the outer diameter and the free length as a cross-check is matching hardware, which is the right way round for a spring-centre buffer.
Ask what the buffer is moulded from and request material data with the quotation. Density sets the rate curve: a stop that is too soft engages early and firms up the rear over ordinary inputs, while one that is too dense stops cushioning anything. This single question separates a moulding manufacturer from a trader reselling mixed stock. Order a small trial batch and inspect it for compression set before scaling up.
A bump stop is well suited to a private-label programme: the geometry is fixed by the OE number, tooling is modest, and one mould profile can serve both revisions in the family. Buyers commonly ask for branded cartons with their own part number and barcode, or rear-axle kits bundling the buffer with the spring seat and cover. Agree export packaging, labelling and traceability documents at the quotation stage.
No. They belong to different Touareg generations. 7L0512131B is the first-generation 7L part of about 92 mm working height, while 7P6512131B is the second-generation 7P part of about 101 mm. The platform change also brought a different spring and damper, so the two buffers are not interchangeable.
No. Air-sprung Touareg 7P cars use a complete air strut in place of the coil spring and damper pair, so there is no coil spring buffer at this position. The steel-sprung market range is qualified by the PR codes 1BA, 1BE and 1BW, with GP0 on later cars.
Two, one per rear corner. The part is not handed, so the same number serves the left and the right rear damper, and it is normally replaced in pairs together with the dampers.
Yes. OEM and custom design support covers private-label packaging, your own part number and barcode, and compound options within the same mould profile. Send the OE reference, model year, suspension type and target quantity and we will confirm specification, lead time and pricing.
Send the OE number 7P6512131B, the model year and the markets you serve, and we will confirm availability, lead time and pricing. Browse the full auto parts catalogue for the wider range, compare the section on Volkswagen suspension parts for related bump stops and mounts, and start from the China auto parts factory overview for sampling, OEM and wholesale terms. Quote the number, not the description.
