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Buyers who search for OE 48331-33071 are usually replacing a worn front strut bumper on a Toyota Camry, Aurion, RAV4 or a Lexus ES — or quoting it as a stock line for their local market. This front jounce bumper is a small component, but when it crumbles, the shock absorber loses its last line of defense against hard bottoming-out, and ride noise increases noticeably.
Bonpora produces the 48331-33071 strut bump stop (Bonpora No 4110094) in microcellular polyurethane at its own factory in China. This guide explains what the part does, which vehicles it covers, how the OE number chain works, and what to check before placing an order.
In Toyota parts catalogs the component appears under several names: Bumper, Front Spring, Strut Bumper, Bump Stopper, or front shock absorber buffer block. In the European aftermarket it is commonly listed as a jounce bumper. All of these terms describe the same part — a cylindrical polyurethane buffer that slips onto the piston rod of the front strut, inside the coil spring seat area.
The bump stop works as a progressive cushion at the end of the suspension travel. When the strut compresses fully — on a deep pothole, a tall speed bump, or a heavily loaded vehicle — the foam is compressed before metal contacts metal. A healthy bumper protects the strut rod, the internal valving, and the spring seat from impact damage, and keeps the ride from turning harsh at full compression.
Original foam stoppers are exposed to heat, water, road salt and ozone. Over time the material hardens, cracks, or disintegrates into crumbs that fall into the spring seat. Age and mileage are the main factors, not driving style alone — which is why the part is a routine replacement whenever a strut is being serviced.
The drawing dimensions below are the reference values we produce to. Confirm against your sample or OE drawing before mass ordering, especially if your source catalog quotes a different measurement basis.
| Parameter | Value |
|---|---|
| Product Name | Strut Bump Stop (Front Jounce Bumper) |
| OE Number | 48331-33071 |
| Bonpora No | 4110094 |
| Fitment | Toyota / Lexus (see application list) |
| Size | Φ20.65 x Φ55.6 x 92.4 mm |
| Material | Polyurethane (microcellular foam) |
| Country of Origin | China |
| Warranty | 1 Year |
| Delivery Time | 15-30 Days |
| Packaging | Neutral Export Packaging |
| Custom Service | OEM & Custom Design Support |
A note on size: some aftermarket catalogs list an overall length of about 97 mm for this position. The difference typically comes from measuring with or without the mounting collar, or from a revised OE version. Quote the drawing values above and we will match the sample exactly.
Cross-checking Toyota and Lexus dealer catalogs with independent aftermarket databases, OE 48331-33071 covers the front axle (left and right) of the following applications:
| Brand | Model | Chassis Codes | Years (approx.) |
|---|---|---|---|
| Toyota | Camry / Camry Hybrid (XV50) | ACV50, ACV51, ASV50, ASV5#, GSV50, AVV50 | 2011-2020 |
| Toyota | Aurion (XV50) | GSV50 | 2011-2017 |
| Toyota | RAV4 (XA50) | AXAA5#, AXAH5#, AXAL5#, MXAA5# | 2018-2021 |
| Lexus | ES 250 / ES 300h / ES 350 (XV60) | ASV60, AVV60, GSV60 | 2012-2018 |
The XV50 Camry generation is the largest application group — petrol, hybrid, 2.5 L and 3.5 L variants across Asia, Europe, North America and Australia share this front bumper. Regional market codes in catalogs (Asia, Europe, JPP, US) all map to the same part.
For the fifth-generation RAV4 (petrol AXAA5#, hybrid AXAH5#, and MXAA5# variants) the same front bumper applies from the 2018 model year. The Aurion, the Australian full-size sedan based on the Camry platform, also uses this number.
The Lexus ES XV60 shares the front strut bumper with its Toyota siblings. Buying one correct part number across Toyota and Lexus platforms is a practical advantage for wholesalers: fewer SKUs, wider vehicle coverage per SKU.
This position has a history of superseded numbers, and the chain matters when you quote against customer inquiries:
Practical verification steps used by professional buyers: check the number stamped or printed on the removed part; measure overall length, outer diameter and rod hole diameter against the drawing; confirm the chassis code from the vehicle VIN rather than the model name alone; and when in doubt, send us the sample or the OE drawing for confirmation before production.
Some US dealer listings for this suspension family carry notes about sport-tuned suspension variants — certain trims may call for a bumper with a different stiffness or height. If your customer request mentions a sport trim, share the VIN or the number on the original part so we can confirm the correct variant.
Bonpora manufactures this bump stop in microcellular polyurethane, the same material family used for modern OE stoppers, produced by foam molding.
Microcellular PU compresses progressively: it stays soft at small deflection and firms up smoothly at high compression, acting like a progressive spring. This progressive curve is what keeps the transition from cushioning to full compression from feeling like a hard hit.
| Property | Microcellular PU | Conventional Rubber Foam |
|---|---|---|
| Compression response | Progressive, tunable density | Less predictable under aging |
| Resistance to heat and ozone | Good | Cracks earlier |
| Aging behavior | Retains shape longer | Hardens, crumbles |
| Dimensional consistency | Molded to drawing | Varies by batch |
| Custom density options | Available | Limited |
For buyers sourcing for hot or humid markets, material aging behavior is often the difference between a repeat order and a warranty claim. More on our polyurethane material range is available on the polyurethane bump stops page.
Workshop-side, the usual failure signs are easy to recognize and are good talking points for your own customers:
The bumper is typically replaced together with the strut mount or during shock absorber replacement, since the strut must be disassembled either way. For parts retailers, listing the bump stop as an add-on item next to strut mounts and shock absorbers for the same chassis codes is a proven cross-sell pattern in the shock absorber parts category.
Bonpora is a China-based manufacturer specializing in polyurethane suspension components for the automotive aftermarket. Production for this part runs on our own foam-molding line, with dimensional checks against the OE drawing at set intervals.
Standard delivery time is 15-30 days depending on order quantity and production scheduling. Orders ship in neutral export packaging, so you can re-pack under your own brand without conflicts. Warranty is 1 year against material and manufacturing defects. For our broader chassis and suspension program, request the current catalog.
Beyond catalog numbers, we support OEM and custom design: modifications to density, height, diameter and mounting geometry, production against customer drawings or samples, and private-label packaging. If your market needs a part that is not yet in the catalog, send the sample or drawing and our engineering team will quote the tooling and unit price — see the custom parts page for the process.
It fits the front axle of Toyota Camry XV50 (2011-2020, including hybrid), Toyota Aurion GSV50, Toyota RAV4 XA50 (2018-2021) and Lexus ES XV60 (2012-2018). Dealer and aftermarket catalogs show left and right sides use the same bumper. Always confirm the chassis code from the VIN before ordering.
Toyota dealer catalogs list the two numbers as replacing each other for this position, and 48331-33070 is also referenced as interchangeable in aftermarket databases. In practice they refer to the same front strut bumper design; we supply to the 48331-33071 drawing and confirm fitment by dimensions when an older number is quoted.
For catalog parts we quote standard wholesale quantities with mixed-container loading supported, so you can combine this bumper with other SKUs in one shipment. Small trial quantities can be arranged for new customers evaluating quality; contact us with your target quantity for an exact quotation.
Yes. We provide OEM and custom design support including material density selection, dimensional changes, and private-label packaging. Send your drawing or a physical sample, and we will confirm feasibility, tooling cost and lead time before production starts.
If you are sourcing OE 48331-33071 strut bump stops — or building a Toyota and Lexus front suspension program around the XV50 and XA50 platforms — send us your quantity and destination port. Our sales team will reply with pricing, packing details and current production lead time, and samples can be arranged for quality evaluation before you commit to a container order.
