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The strut bump stop catalogued under OE number 48331-AB010 is the front spring bumper used across the Toyota Corolla and Matrix families built on Toyota’s North American production platforms — Corolla sedans spanning the E120/E130 through the E140 series (approximately 2003–2013), the Matrix hatchbacks (2003–2014), and the Japanese-market Voltz twin. This page describes the part as supplied by Bonpora (number 4110240), a China-based auto parts factory producing polyurethane bump stops as original and replacement parts for the independent aftermarket, and sets out the specification, fitment, and sourcing information wholesale buyers normally request before ordering.
Also sold under the names jounce bumper, bump stopper, and in the Toyota catalogue simply as front spring bumper, the part is a moulded elastomer unit fitted at the top of the front strut assembly. During normal driving it hangs clear of its engagement surface. Under a hard compression event — a pothole, a speed bump, a fully loaded vehicle — it engages progressively and converts what would otherwise be a metal-to-metal impact into controlled resistance.
Elastomer parts age whether the vehicle is driven or parked. Heat, ozone, road salt, and repeated compression cycles harden the material until it cracks and loses its progressive response, after which the damper bottoms out and damage spreads to the dust cover and top mount. Corolla and Matrix vehicles of this era have been in daily service for two decades or more, so original stops have usually hardened long ago, and the component belongs in every front suspension service job on these cars. For the wider suspension range, see our auto parts catalogue.
Within the Toyota parts system, the 48331-AB010 reference carries the catalogue description Bumper, Front Spring, also listed as Suspension Strut Bumper, Front, and it belongs to a bumper family that covers both axles on the same platforms: the rear companion reference carries 48341-AB010. Both stops share the same polyurethane construction and service logic, and the front reference is the one most frequently requested, because the front struts carry the engine weight and steer while they compress.
| Parameter | Value |
|---|---|
| Product name | Strut Bump Stop |
| OE number | 48331-AB010 |
| Bonpora no. | 4110240 |
| Fitment | Toyota Corolla & Matrix (NAP platforms), front axle |
| Dimensions | Φ21 x Φ56 x 88 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 |
Φ21 mm is the inner bore that slides onto the damper rod, Φ56 mm is the outer diameter of the elastomer body, and 88 mm is the free length. United States catalogue listings for the genuine reference quote a package of roughly 4.6 by 2.5 by 2.5 inches; published figures differ slightly between sources, and the dimensions taken from the removed part remain the deciding check before any substitution is approved. A taller stop makes the ride firm, while a shorter one lets the strut knock over sharp bumps.
Polyurethane suits this duty cycle well. Compared with conventional rubber it resists tearing and oil exposure better, holds its mechanical properties across a wider temperature range, and can be moulded to a controlled hardness so the compression curve stays progressive rather than abrupt. The material also suits vehicles that stand still for weeks at a time, because parked elastomer is attacked by ozone and goes brittle first at the surface — a common pattern on Corolla and Matrix vehicles still running as family transport and taxi fleets.
The AB010 reference is shared across a wide run of front-wheel-drive Toyota models. Genuine Toyota fitment lists cover the Corolla CE, LE, S, STD, XR, XLE, and XRS trims from 2003 to 2013 — the North American built sedans with the 1ZZ-FE and 2ZZ-GE engines, then the E140 series (chassis codes ZRE142 and AZE141) with the 2ZR-FE and 2AZ-FE engines — together with the Matrix in Base, S, XR, and XRS trims from 2003 to 2014 (chassis family ZZE13#, then AZE14#/ZRE142), and the related Japanese-market Voltz. Aftermarket cross-reference catalogues group the reference with the FEBEST number TD-130F for the front axle.
Demand behind this reference comes from two buyer groups: wholesalers covering the independent aftermarket in regions where this generation of Corolla and Matrix still runs in daily service, and fleet or taxi operators who keep older Toyotas in service and need predictable wear-part supply. Both are served from the same tooling and quality system, which is what makes factory-direct supply attractive in this category.
When comparing quotations for a polyurethane stop, ask the supplier for the material grade and Shore A hardness, a dimensional inspection report covering bore, outer diameter, and free length, and evidence of batch-to-batch hardness consistency, since elastomer properties are sensitive to cure conditions. A factory answering those questions with documents, rather than promises, is normally the safer partner for repeat programmes.
A factory with OEM and custom design capability can produce stops to a customer drawing or sample, including non-standard bore sizes, alternative hardness grades, and application-specific profiles — useful for private-label ranges as well as vehicles with modified ride heights. Stocked references ship in wholesale quantities within 15–30 days in neutral export packaging, ready for relabelling or private-label cartons; new tooling is quoted against the drawing and an agreed annual volume. Our auto parts sourcing team can review drawings, samples, and cross-reference lists alongside catalogue items.
A worn bump stop is often discovered during damper replacement, but it can also be diagnosed from the driver seat before the vehicle goes on the lift.
The stop is fitted one per corner, and standard practice is to replace the pair on an axle at the same time. Bump stops are normally renewed together with the related dust covers and top mounts, since all share the same access procedure and a similar service life, and the work is naturally done while the dampers are off. Support the suspension before releasing fasteners, torque the components at normal ride height, and compare the old part against the new item to confirm bore, diameter, and free length. Wholesalers preparing service kits for this platform usually pair the front 48331-AB010 with the rear 48341-AB010 so both axles are covered from one supplier.
The front spring bumper reference is listed by Toyota for the Corolla from 2003 to 2013 (E120/E130 and E140 series, with the 1.8 L and 2.4 L four-cylinder engines) and the Matrix from 2003 to 2014, together with the Japanese-market Voltz. Aftermarket catalogues group it with the FEBEST TD-130F cross-reference. Because running changes and regional naming vary, confirm the application with the vehicle identification number or the OE number on the removed part, and ask for a written cross-reference list covering the models you service.
No — they belong to the same bumper family for the same platforms, but 48331-AB010 is the front spring bumper fitted inside the strut assembly, while 48341-AB010 is the rear spring bumper on the coil spring. The two differ in shape and dimensions, so quote and stock them as separate items even though they are often replaced during the same service visit.
Minimum order quantities depend on whether the item is a stocked catalogue reference or a custom moulding. Stocked references ship from current stock; private-label or custom profiles are quoted against tooling and an annual volume agreed with the factory. Send the target models and annual quantity to receive terms that match your programme.
Quoted delivery is 15–30 days for stock-referenced items, with neutral export packaging prepared for sea or air freight. Confirm the shipping method and destination port when requesting the quotation so the terms match your planning.
If you are sourcing strut bump stops for Toyota Corolla and Matrix applications in wholesale quantities, or planning a private-label suspension programme under your own brand, send the OE number, target models, and annual volume. The factory can confirm availability, provide dimensional and material data, and quote on neutral export packaging or private-label terms.
