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A strut bump stop is the elastomer cushion that sits on the damper rod and takes over in the final part of the suspension stroke. It works for a fraction of a second, but that fraction decides whether the shock absorber and the top mount survive a loaded kerb strike or a broken road surface. The OE number 48331-42030 is the front spring bumper that Toyota lists for the third generation RAV4, for the Vanguard sold in Japan, and for the Noah, Voxy and Esquire people carriers. This guide explains what the part does, which platforms it covers, and how a purchasing team can order it without confusing the front reference with the rear one.
Toyota catalogues this item under the group Front Spring and Shock Absorber, and the trade uses three names for the same component: bumper, front spring; strut bump stop; and jounce bumper. It is a sleeve shaped polyurethane cushion that mounts on the front damper rod above the dust cover. It is not a coil spring, not a spring seat and not a shock absorber. Its action is progressive, staying almost idle through normal travel and then compressing at the end of the stroke so that metal parts do not meet metal.
Bonpora supplies the reference as part 4110158, moulded in polyurethane. The finished cushion measures roughly 96.5 mm tall with a 21.1 mm bore and a 58.3 mm outer diameter. Catalogue data published by other suppliers quotes a 101 mm height for the same application, which is the familiar difference between a nominal catalogue figure and a measured finished moulding. Both describe the same fitment, and the dimension to check on an enquiry is the bore and the mounting position rather than the last millimetre of height.
| Specification | Detail |
|---|---|
| Bonpora part number | 4110158 |
| OE reference | 48331-42030 |
| Component type | Rubber buffer, suspension (bump stop) |
| Fitting position | Front axle, left and right |
| Height, finished part | 96.5 mm |
| Bore, inner diameter | 21.1 mm |
| Outer diameter | 58.3 mm |
| Material | Polyurethane |
| Weight, reference | Approximately 0.085 to 0.096 kg |
| Quantity per axle | 2 |
| Country of origin | China |
| Warranty | 1 year |
| Delivery time | 15 to 30 days |
| Packaging | Neutral export packaging |
| Custom service | OEM and custom design support |
This is the single most useful thing to know before quoting. Toyota has revised the number several times, and the current service number in the dealer network is 48331-28090. All four references below describe one physical front cushion, and a distributor who lists only one of them will miss enquiries placed with a different code.
| Reference | Status | Notes for buyers |
|---|---|---|
| 48331-42030 | Original plant number, superseded | The reference in this listing. Used on early RAV4 A3 builds and on the Noah and Voxy ranges |
| 48331-42060 | Parallel plant number | Listed as a matching number against the same cushion, common on JPP built vehicles |
| 48331-0R010 | Regional plant number | Appears in catalogue fitment lists for RAV4 and Vanguard alongside the other three |
| 48331-28090 | Current service number | Replaced by entry quoted by dealers. Some catalogues describe it as Anschlagdaempfer, impact damper |
Dealer parts pages state the relationship in plain terms, describing 48331-42030 as replaced by 48331-28090. That is not a change of shape. It is the normal Toyota pattern of consolidating several plant specific numbers into one service reference once the older part numbers stop being ordered. An importer holding a customer enquiry against 48331-42030 can therefore quote against 48331-28090, and the opposite also holds.
Toyota uses consecutive numbering for the two axles, and the digits are easy to misread on a faxed order sheet. 48331 is the front spring bumper. 48341 is the rear spring bumper, catalogued as Bumper, Rear Spring, No 1 and listed for the RAV4 under 48341-42010, itself replaced by 48341-0R010. The two parts sit at opposite ends of the vehicle, they have different heights and different bores, and they cannot be substituted for each other.
| Reference | Axle | Application in this family |
|---|---|---|
| 48331-42030 | Front | Covered by this listing. RAV4 A3 platform, Vanguard, Noah, Voxy, Esquire |
| 48331-28090 | Front | Current service number for the same front cushion |
| 48341-42010 | Rear | Bumper, rear spring, number 1. Different part, sold separately |
| 48341-0R010 | Rear | Current service number for the rear cushion |
A workshop restoring a full set of bump stops on a RAV4 needs both numbers. Asking for a front and rear set against a single reference will lead to a short shipment. Buyers who also stock the rear side should review the rest of the strut hardware in one order, because the cushion, the dust cover and the top mount are usually renewed in the same visit. Our dust covers section covers the matching boots for this platform.
Two vehicle families use this cushion. The first is the third generation RAV4, chassis A3, sold from late 2005. The second is the Noah, Voxy and Esquire family, a Japanese market people carrier line that shares the front strut design. The Toyota Vanguard, the longer wheelbase variant of the RAV4 sold in Japan, is also listed against the same number.
| Model | Chassis and platform | Period |
|---|---|---|
| RAV4 | A3, ACA30, ACA31, ACA33, ACA38 | 2005 to 2012 |
| RAV4 | A3, ALA30, ALA35, ZSA30, ZSA35 | 2005 to 2012 |
| RAV4 | A3, GSA33, GSA38, 3.5 V6 petrol | 2005 to 2012 |
| RAV4 EV | QEA38, electric drive | 2012 to 2014 |
| RAV4 | A3, China built FAW assembly | 2009 to 2013 |
| Vanguard | ACA31W, ACA33W, ACA38W, GSA33W | 2005 to 2013 |
| Noah and Voxy | R7, ZRR70, ZRR75 | 2007 to 2014 |
| Noah, Voxy and Esquire | R8, ZRR80, ZRR85, ZWR80 | 2014 to 2021 |
Engine coverage runs from the 1AZ-FE and 2AZ-FE petrol units through the 2GR-FE V6 to the 2AD-FHV and 2AD-FTV diesels and the 3ZR-FAE and 2ZR-FXE units that power the later people carriers. Because one cushion serves all of them, stocking decisions do not depend on engine code. The split that matters is body style and build region.
Toyota build records distinguish between vehicles assembled in Japan, shown as JPP in catalogue fitment data, and vehicles from other plants. The front cushion is shared, but the surrounding strut components are not always identical, and some catalogue fitment tables list the JPP prefix separately because the combination of spring and damper differs. When a customer sends a chassis code, ask for the plant prefix before confirming the order. It takes one message and it prevents a return.
Most European and Middle East distributors search their own supplier number rather than the Toyota reference, so a factory listing should carry the common aftermarket crosses. The table below collects the numbers published against this application.
| Brand | Number | Notes |
|---|---|---|
| FEBEST | TD-GSA33F | Front axle jounce bumper, 0.096 kg, listed against 48331-42030, 48331-42060, 48331-28090 and 48331-0R010 |
| QUATTRO FRENI | QF00V00005 | Rubber buffer, suspension |
| STELLOX | 11-98240-SX | Rubber buffer, suspension |
| TRIALLI | BC 1948 | Rubber buffer, suspension |
| UNIGOM | 392971 | Rubber buffer, suspension |
The FEBEST entry is the most widely quoted of these, and it lists all four Toyota numbers against one box, which is a useful confirmation that the supersession chain above is genuine rather than a catalogue error. A purchaser who asks for TD-GSA33F and a purchaser who asks for 48331-28090 are asking for the same physical cushion.
The original component is a microcellular elastomer buffer. Bonpora moulds the replacement in polyurethane, which holds its shape better under repeated compression and resists oils, road salt and ozone ageing. On a compact SUV that regularly carries a full boot or tows a trailer, that difference shows up as a cushion that still works after several seasons.
| Property | Polyurethane buffer | Conventional rubber buffer |
|---|---|---|
| Compression set after repeated loading | Lower, profile is retained longer | Higher, the cushion flattens over time |
| Oil and grease resistance | Good | Limited |
| Ageing from ozone and sunlight | Slow | Faster, surface cracks appear earlier |
| Cold weather behaviour | Stays flexible | Stiffens noticeably |
| Hardness control during moulding | Wide range, repeatable batch to batch | Narrower range |
Front cushions are replaced in pairs. Both sides see the same number of load cycles, and fitting one new buffer against a compressed original leaves the vehicle sitting unevenly when loaded. The strut has to come apart for the job, so the dust cover should be inspected at the same time. A torn boot lets grit reach the piston rod, and a new cushion inside a damaged boot will not last a season.
The mount itself should also be checked while the strut is open. A collapsed top mount changes the working position of the cushion and will make a new part fail early. For a full view of the components that sit on the strut, see our shock absorber parts range.
Yes. Toyota consolidated the number and 48331-28090 is the current service reference. Dealer pages describe 48331-42030 as replaced by 48331-28090, and catalogues such as FEBEST list both against the same front axle jounce bumper, together with 48331-42060 and 48331-0R010. All four describe one cushion of the same shape and size.
No. 48341-42010 is the rear spring bumper, catalogued as Bumper, Rear Spring, No 1 and itself replaced by 48341-0R010. It fits the rear axle and has different dimensions. The front and rear cushions are separate parts on the same vehicle and cannot be interchanged.
Two on the front axle, one for each strut. A full vehicle set also requires two rear cushions, ordered against the 48341 reference. Workshop orders are normally placed in pairs for a single car or in cartons for stock.
Delivery time for this reference is typically 15 to 30 days from order confirmation, depending on quantity and destination. Packaging is neutral export carton as standard, and OEM or private label marking can be arranged. Send the OE number, the quantity per model and your destination port, and our team will confirm availability and pricing.
Bonpora produces this front spring bumper in polyurethane as part 4110158, alongside a catalogue of strut cushions for Japanese and European platforms. Buyers who need a different hardness, a different profile or a private label version can use our custom parts service. Send your enquiry with the OE number and the target vehicle, and we will confirm dimensions, packaging and lead time.
