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A Ford strut bump stop is a small but critical suspension component that limits upward travel of the strut and protects the damper from bottoming out. The part referenced by OEM numbers 93BB5K570AC and 1106853 is a direct-fit replacement for a range of Ford passenger cars, and it is one of the most frequently reordered items in the aftermarket suspension catalog. This page covers the specifications, fitment, material options and sourcing details you need when comparing suppliers.
Purchasing teams usually start with a dimensional check before they look at price. The reference part below is manufactured to the original drawing tolerances and is dimensionally interchangeable with the genuine Ford item.
| Parameter | Value |
|---|---|
| Product Name | Strut Bump Stop |
| Bonpora Nos | 4110073 |
| OE / OEM Number | 93BB5K570AC 1106853 |
| Fitment | Ford |
| Size | Φ21 x Φ62.5 x 143.8 mm |
| Material | Polyurethane |
| Country of Origin | China |
| Warranty | 1 Year |
| Delivery Time | 15–30 Days |
| Packaging | Neutral Export Packaging |
| Custom Service | OEM & Custom Design Support |
The stated size Φ21 x Φ62.5 x 143.8 describes a stepped, cylindrical buffer: the upper bore of 21 mm locates on the strut rod, the body diameter of 62.5 mm governs how much travel is absorbed before contact with the mount, and the overall length of 143.8 mm sets the ride-height clearance under compression. If you are cross-checking against a Genuine Ford part, confirm these three values first — small deviations in length are the most common cause of premature failure or noise complaints after installation.
Bump stops are frequently ordered by OE number rather than by vehicle description, because one part number often covers several model years. If you are sourcing by OEM number, treat 93BB5K570AC and 1106853 as the primary identifiers, and use the Bonpora number 4110073 as the internal reference when you request a quotation.
When a buyer sends only a number, the reply should always come back with a dimensional drawing, a material certificate and a photo of the finished part. This confirms that the supplier is quoting against the correct tooling instead of substituting a visually similar bump stop from another platform. A reliable auto parts supplier will match the OE number, the length and the material grade in the same message rather than asking you to re-specify the part.
This bump stop is used on the front strut assembly where the damper is exposed to repeated full-travel events. Vehicles carrying frequent loads, operating on poor road surfaces, or fitted with lowering springs stress the buffer far more than a standard commuter cycle, so material selection matters more than the purchase price of a single unit.
Original bump stops were commonly moulded from microcellular rubber. Microcellular polyurethane (MPU) has largely replaced it in replacement parts because it holds its shape under repeated compression and resists oil, ozone and road-salt exposure.
| Property | Microcellular Polyurethane | Rubber |
|---|---|---|
| Compression set | Low — recovers after load | Higher — gradual sagging |
| Oil & ozone resistance | Good | Moderate |
| Operating temperature | Typically −40°C to +80°C | Narrower range |
| Load-carrying capacity | Higher for a given volume | Lower |
| Service life in suspension use | Generally longer | Generally shorter |
The trade-off is cost and stiffness. A harder compound reduces travel and transmits more noise; a softer compound absorbs more energy but may compress past its designed limit under heavy load. For most replacement applications a medium-density polyurethane matched to the original hardness gives the closest behaviour to the factory part.
Buyers who need a non-standard length, diameter or hardness can usually have the part produced to their own drawing. Typical customisation scope includes:
For custom programmes, prepare a drawing with tolerances, a target hardness (for example Shore A or density in kg/m³), the expected annual volume and the required packaging format. These four items are enough for a factory to quote and build tooling. More background on our suspension range is available on the Ford auto parts category page.
Replacement suspension parts are usually inspected in batches rather than individually, so the inspection standard should be agreed before the order is placed. A practical QC checklist for a polyurethane bump stop covers dimensional verification against the drawing, hardness testing of the compound, visual inspection for flash and voids, and a compression test on sampled units.
For export shipments, neutral packaging keeps the carton free of branding so it can be distributed through different channels. Each carton is normally labelled with the OE number, the Bonpora number and the batch code so the goods can be traced back to the production run.
To get an accurate price and lead time, send the OE number together with the quantity, the destination port and the packaging requirement. If the part number is unknown, a photograph of the old bump stop beside a ruler is usually enough to identify it.
Yes. The reference part is produced to the original dimensions Φ21 x Φ62.5 x 143.8 mm and is intended as a direct-fit replacement for applications using OE numbers 93BB5K570AC and 1106853. We recommend confirming the three key dimensions against your old part before ordering.
Yes. Custom length, diameter and polyurethane density are available with OEM and custom design support. Provide a drawing with tolerances plus the expected order volume, and the factory can quote tooling and unit price.
Minimum order quantity depends on whether the part is a stock item or a custom build. Standard production and delivery lead time is 15–30 days after order confirmation, and freight time is additional depending on the destination port.
Replacement strut bump stops are supplied with a 1-year warranty covering manufacturing defects. The warranty does not cover damage caused by incorrect installation, modified suspension geometry or use beyond the rated load.
Send us your required quantity and destination port for a quotation, or ask for a sample to verify fitment before you commit to a full order. Requests for the OE number 93BB5K570AC / 1106853 are answered with specification, price and lead time in the same reply.
Contact us for a quote on Ford suspension bump stops — OEM and custom design support available.
