Porsche Strut Bump Stop 971512131B - Polyurethane OEM & Wholesale Supplier from China

A Porsche strut bump stop with OE number 971512131B is a small but critical suspension accessory on the front strut assembly. It sits on the piston rod, compresses during the final part of the suspension travel, and prevents the damper from bottoming out under load. For importers, distributors and independent workshops servicing Porsche vehicles, this reference is a recurring reorder item. This page sets out the technical specification we manufacture, the OE number and interchange details, the checks to run before ordering, and the supply terms available to trade buyers.

Product Specification of This Porsche Strut Bump Stop

The table below lists the current manufacturing data for this reference. Buyers can use it directly as a technical sheet for quotation requests and for quality comparison between suppliers.

Dimension reading for engineers: the first value 17.2 mm is the nominal inner bore that slides over the damper rod, 62 mm is the outer diameter of the base, and 75 mm is the overall free height of the part. All three values need to match before the part can be treated as a replacement, because a bump stop is a spacing and travel-limiting component rather than a load-bearing spring.

OE Number, Interchange and How Buyers Search This Part

What 971512131B refers to

The 971 prefix belongs to the current Porsche ten-digit parts numbering family used across modern model lines. The 512 131 group identifies a bump stop for the strut assembly, and the trailing B suffix is a revision letter that can indicate a change in height, hardness or material compound. Buyers sourcing for the European aftermarket, the Middle East or North America usually search with the full code including the suffix, because dropping the suffix can return a superseded reference.

When a purchasing officer types 971512131B bump stop supplier or Porsche 971512131B polyurethane, the useful result is a page that shows the OE code, the measured dimensions and the material in one place rather than a generic catalogue listing. That is the structure used here.

How to confirm the part against your own catalogue

Before placing an order, run these three checks:

• OE number: compare the complete code, including the letter suffix. A suffix difference can point to a different revision with a changed free height, which matters on a low-clearance suspension.
• Measured dimensions: pull a used part and measure bore, base diameter and free height. On a bump stop, a 2 to 3 mm difference in height changes the point at which the suspension stops travelling.
• Model and platform: confirm the model year, engine variant and market version rather than relying on the badge alone, because shared platforms can carry more than one damper specification.

If your catalogue lists a different code for the same vehicle, send us both numbers. In most cases we can cross-check the drawing and confirm whether the same tooling applies.

Material: Why Polyurethane Suits This Application

Polyurethane is the material used for this reference. Compared with conventional rubber, a polyurethane bump stop holds its shape across a wider temperature range, resists oil and road salt more effectively, and deforms progressively instead of collapsing. That progressive behaviour is what allows the part to control the final travel of the strut without transferring a harsh shock into the body structure.

For buyers, the practical questions are hardness grade, temperature range and rebound behaviour. We confirm the grade against the supplied sample or the OE drawing, then keep it as a fixed production parameter so that repeat orders stay consistent. Related suspension components that follow the same material logic are grouped in our polyurethane bump stops category.

Supply Terms for Importers and Distributors

Packaging and delivery

Standard shipment uses neutral export packaging, which allows importers to apply their own labels without a repacking step. Delivery time for this reference is normally 15 to 30 days, depending on order quantity, the level of customisation and the shipping method selected. A warranty of 1 year applies to the parts we supply.

OEM and custom design support

We support OEM and custom design work: buyer branding, private-label packaging, hardness adjustment and dimensional changes based on a drawing or a physical sample. Custom projects begin with sample evaluation, so include the target dimension sheet and the expected annual volume in your first message. Our custom parts section explains how the approval flow works from drawing to first article.

Ordering notes that reduce rejection risk

Bump stops are a low-value, high-frequency item, so most ordering errors come from a wrong suffix or a wrong free height rather than from a wrong product family. Send the OE code, the measured size and the vehicle details together and the quotation can be confirmed without repeated clarification. The wider suspension range, including related strut and damper components, is listed under our shock absorber parts collection.

Quality Checks Buyers Usually Ask About

Dimensional and visual inspection

Each production batch is checked against the reference drawing for bore, base diameter and free height. The surface is inspected for flash, mould marks and voids, since these are the defects most likely to appear on a polyurethane moulding and the easiest to spot on incoming inspection.

Hardness and rebound verification

Hardness is verified with a durometer against the agreed grade, and a compression test confirms that the part returns to its original height after cycling. For buyers with an internal quality process, we can supply the inspection record with the shipment so that the receiving department has a documented baseline.

FAQ

1. What does the B suffix mean on 971512131B?

The trailing letter is normally a revision indicator in the Porsche numbering system, and it can reflect a change in free height, hardness or material compound. Because a revision can alter how far the suspension travels before contact, send the full code with the measured dimensions and we will confirm which tooling applies to your requirement.

2. Can this bump stop be supplied in a different hardness or height?

Yes. We support custom design work, including height adjustment and hardness changes, based on your drawing or a physical sample. The minimum order quantity and lead time for a custom version depend on the requested change, so it is best to send the target specification and expected annual volume for a firm quotation.

3. How do I verify fitment before ordering?

Use three data points: the full OE number including the suffix, the measured bore, base diameter and free height, and the vehicle model year with engine variant. If the OE code is not legible on the old part, a photograph of it next to a ruler is usually enough for a first cross-check.

4. What are the packaging, delivery and warranty terms?

Parts ship in neutral export packaging by default, which suits importers applying their own branding. Standard delivery time for this reference is 15 to 30 days depending on quantity and shipping method, and the parts we supply carry a 1 year warranty.

Request a Quotation for This Porsche Bump Stop

Send us your OE number, the measured dimensions and the target quantity. We will reply with the unit price, the packaging option and the estimated production schedule for 971512131B strut bump stops, and we can attach a dimensional drawing for your engineering team to review before the order is confirmed.