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Buyers who search for OE 30635296 are looking for the rear suspension bump stop used across the compact Volvo range built on the C1 platform: the S40 II saloon, the V50 estate, the C30 hatchback and the C70 II convertible. The part is a polyurethane cushion fitted over the piston rod of each rear shock absorber, where it limits compression travel and protects the damper from full-metal contact. Because these four models share their suspension architecture, one bumper reference covers a vehicle family that sold in large numbers in Europe and North America between 2004 and 2013.
Bonpora manufactures this bumper under item number 4110122 in polyurethane, sized 14.5 mm bore, 57.3 mm outer diameter and 107.5 mm free height. The part is supplied as a single piece, with two pieces required per car, and it ships in neutral export packaging with OEM and custom design support for wholesale buyers.
In the Volvo parts system the reference 30635296 is catalogued as a spring stop, also described in the trade as a suspension rubber buffer, compression bumper or rear bump stop. It is a shaped polyurethane element that slides onto the piston rod of the rear shock absorber, above the dust cover. When the rear axle compresses fully, over a speed bump, a pothole edge or a heavy load, the bumper collapses progressively and stops the metal components inside the damper from striking each other.
Without an intact bumper, every full-compression event transfers directly to the damper seal, the rod guide and the internal valving, which shortens shock absorber life and produces a hard knocking noise from the rear axle. Inspecting shock absorber parts at every shock replacement is standard workshop practice, because the bumper costs a fraction of a new damper and usually shows its condition at a glance.
The C1 platform uses an independent multilink rear suspension with a separate coil spring and damper at each wheel. Catalogue data from several aftermarket suppliers place the 30635296 bumper on the rear axle, one piece per side and two pieces per vehicle. The bumper works in both directions of suspension movement: on compression it cushions the final millimetres of travel, and on rebound it seats against the dust cover cap so the rod does not extend into uncontrolled travel.
Volvo lists a second number, 30666243, for the same rear bumper application, and major catalogue publishers such as Febi Bilstein, SWAG, STC and Monroe quote both 30635296 and 30666243 on the same product pages. In practice the two references are treated as a matched pair covering the same rear axle buffer for the C1 models, and Febest even markets its equivalent as XOE-30666243. Buyers should quote both numbers when sourcing, since some supplier catalogues index only one of the two.
The C1 platform was developed during the Ford ownership period and is shared with the second-generation Ford Focus family. Volvo assembled the S40, V50 and C30 in Ghent, Belgium, and the C70 convertible in Uddevalla, Sweden. All four models share the multilink rear axle, which is why one bumper reference covers the whole family. Catalogue coverage for the rear bumper under 30635296 and 30666243 spans petrol and diesel versions from roughly 100 to 250 hp.
| Model | Body | Catalogue production window |
|---|---|---|
| Volvo S40 II (544) | Saloon | 2004 - 2012 |
| Volvo V50 (545) | Estate | 2004 - 2012 |
| Volvo C30 (533) | Hatchback | 2006 - 2013 |
| Volvo C70 II (542) | Convertible | 2006 - 2013 |
Engine coverage in the independent catalogues includes the 1.6, 1.8 and 2.0 petrol units, the 2.4 and 2.5 T5 versions, the FlexiFuel variants and the diesel line from D2 through D3, D4 and D5. Production start dates are listed as 2003 in some catalogues and 2004 in others, depending on market. The final fitment check should always be done by the OE number or by VIN with a dealer parts system.
The references in this article apply to the rear axle of the four C1 models only. The front struts of the same cars take their own dust covers and bumpers under separate references, for example the 30666842 front bellows, and the larger Volvo platforms such as the P2 and P3 families (V70, XC60, S80, XC90) use their own bumper numbers despite appearing together with this part in some aggregated kit listings. Buyers working from a mixed-parts enquiry should therefore confirm the axle position before quoting, and treat physical sample comparison as secondary to the OE number.
Published dimensions for this bumper agree closely between suppliers, because the profile is short and cylindrical rather than strongly tapered. The table below compares the Bonpora drawing with two widely quoted catalogue entries.
| Source | Bore | Outer diameter | Length | Material |
|---|---|---|---|---|
| Bonpora 4110122 | 14.5 mm | 57.3 mm | 107.5 mm | Polyurethane |
| Febi 172245 / SWAG 33 10 1252 | approx. 14 - 16.5 mm | 59 mm | 108 mm | PU |
| STC T442037 | 14 / 16.5 mm | n/a | 108 mm | PU |
The free length agrees at 107.5 to 108 mm across all sources, which is the dimension that sets the travel limit and therefore the ride feel. Bore readings of 14 to 16.5 mm reflect measurement at the two ends of the stepped inner profile. Unit weight is around 60 grams, and each car uses two pieces. As with this whole part family, the OE number, not a calliper comparison, should decide the purchase.
The number is well covered in the independent aftermarket, which is a positive signal for wholesale buyers since demand is proven and multiple sourcing routes exist. Documented equivalents include the following entries.
| Brand | Number | Type |
|---|---|---|
| Febi Bilstein | 172245 | Bumper |
| SWAG | 33 10 1252 | Bumper |
| STC | T442037 | Bumper |
| Monroe | PK184 | Protection kit |
| KYB | 910217 | Protection kit |
| Sachs | 900 200 / SRLine S030148 | Protection kit |
| Bilstein | 11-320029 | Protection kit |
| Boge | 89-200-0 | Protection kit |
| TRW | JSK4192T | Protection kit |
| Magneti Marelli | 310116110135 | Protection kit |
| Maxgear | 72-6997 | Bumper |
| Optimal | AK-735306 / AK-735509 | Bumper |
| Kamoka | 2019114 / 2020114 | Protection kit |
| GSP | 5405061PK | Protection kit |
| Japanparts / Ashika | KQ0330 / 159-00-0330 | Bumper |
| Febest | XOE-30666243 | Bumper |
Additional entries documented in the same catalogues include Metalcaucho 42037, Original Imperium 32606, Talosa 63-12465, Stellox 11-27421-SX, Cautex 757013, Fare SA 28110 and Profi t 2314-0907. Febi also publishes a kit version, 172247, which pairs two dust covers with the rear bumpers for a complete protection service per axle. A mature cross-reference footprint of this size makes the reference straightforward to position for distributors in Europe and North America.
Bump stops are wear items with a defined service role, and on cars of this age the original foam elements are frequently found compressed, powdered or in several pieces. The C1 models are now at least thirteen years old, so rear suspension service on them almost always involves the bumpers.
Typical indicators include a hard knocking or clunking from the rear axle over sharp hits, increased harshness when the car is loaded and bottoms out, and visible collapse of the element when the rear shock is removed. During shock absorber replacement the old bumper often crumbles on removal, which is why professional workshops replace the stop together with the damper rather than reusing it. A missing or destroyed bumper also leaves the damper seal exposed to full-travel impacts, so the cost of the part should always be weighed against the price of a replacement shock.
Because the two rear bumpers age at the same rate, suppliers and workshops recommend fitting them as a left and right pair. This keeps the travel limit identical on both sides of the axle, avoids uneven ride height feel and saves labour, since the rear wheels and dampers are already accessible during the job. Kits that add fresh dust covers in the same service are listed by Sachs, Monroe, KYB, TRW, GSP and Kamoka among others, and they suit cars where the boots have split and allowed dirt onto the rods.
The original elements are typically micro-cellular foam rubber, a material that works well when new but degrades with ozone exposure, temperature cycling and repeated compression. Bonpora presses this bumper in polyurethane, the material already specified by Febi, SWAG and STC for their aftermarket versions of 30635296.
polyurethane bump stops in polyurethane hold their shape and damping curve over more compression cycles than open-cell foam, resist oil contact in the suspension bay and stay consistent in both summer heat and winter cold. For distributors this means fewer warranty returns on a low-value part, and for workshops it means the component still performs at the next damper replacement interval.Bonpora produces suspension bump stops and rubber-to-metal parts for the independent aftermarket, with the Volvo reference covered here manufactured to the dimensions listed above and shipped worldwide.
| Parameter | Detail |
|---|---|
| Bonpora No. | 4110122 |
| OE reference | 30635296 (crosses 30666243) |
| Fitment | Volvo S40 II, V50, C30, C70 II, rear axle |
| Size | 14.5 x 57.3 x 107.5 mm |
| Material | Polyurethane |
| Quantity per car | 2 pieces |
| Warranty | 1 year |
| Delivery time | 15 - 30 days |
| Packaging | Neutral export packaging |
| Custom service | OEM and custom design support |
Bulk buyers can request quotations against the OE number directly, and customers who need a different compound hardness, colour or private-label box can use the custom suspension parts service, which covers drawing-based production from sample or 3D data. Neutral export packaging allows distributors to supply their own dealer networks without brand conflicts.
Catalogues list the rear suspension bump stop under 30635296 and 30666243 for the Volvo S40 II (2004-2012), V50 (2004-2012), C30 (2006-2013) and C70 II convertible (2006-2013), across petrol and diesel versions from about 100 to 250 hp. Because catalogue year ranges differ slightly by market, the safest check is the OE number or a VIN lookup in a dealer parts system.
They are sibling references for the same rear axle bumper application. Major catalogue publishers quote both numbers on the same aftermarket products, including the Febi 172245 and SWAG 33 10 1252 entries. Sourcing under either number leads to the same component for the C1 models, and quoting both numbers widens the supplier search.
Two pieces, one for each rear shock absorber. Workshops recommend replacing them as a pair, and ideally at the same time as the rear dampers and dust covers, so that the protection on both sides of the axle matches.
Yes. Standard production ships in neutral export packaging with a 1 year warranty and a delivery window of 15 to 30 days. For private-label packaging, different polyurethane hardness or modified dimensions, the OEM and custom design service works from drawings, samples or 3D data, and the team quotes tooling and volume pricing on request.
