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A front strut bump stop for the Mazda CX-5 is a small, inexpensive part that quietly decides how the whole front end of the car behaves over rough ground. The Mazda OE number KD35-34-111 identifies the original jounce bumper used on CX-5 KE models, and because the same reference is listed against a second number, KB7W-34-111, buyers who only search by OE number can easily end up ordering twice, or ordering the wrong one. This page sets out what the part is, which vehicles it belongs to, how the two numbers relate, and what to check before you place a wholesale order.
The part is a progressive elastic cushion mounted on the front damper rod, inside the coil spring and above the dust boot. Its job is to absorb the last part of suspension travel. Under heavy braking, a pothole, or a fully loaded car, the spring and damper compress far enough that metal would otherwise meet metal. The bump stop takes that final load and slows it down.
Mazda catalogues the part under several descriptive names: Bumper, Bound; Stopper, Bumper; Strut Bumper; and Suspension Strut Bumper. All of them refer to the same item. In aftermarket catalogues it appears as Rubber Buffer, suspension or as a Shock Absorber Jounce Bumper. Tender titles vary, the function does not.
On the CX-5 the bumper sits between the upper strut mount and the damper body. Two are required per vehicle, one per side, and the front spring assembly is usually rebuilt in pairs. If you are already sourcing strut mounts or dust boots, ordering the bumper at the same time saves a second shipment.
The table below lists the manufacturing data held by our factory for this reference. Dimensions are quoted as diameter by diameter by length and should be checked against your drawing or a sample before a production run.
| Parameter | Value |
|---|---|
| Product Name | Strut Bump Stop (jounce bumper) |
| OE Reference | KD35-34-111 |
| Bonpora No. | 4110082 |
| Fitment | Mazda |
| Size | Φ21.3 x Φ54.8 x 99.2 mm |
| Material | Polyurethane (PU), microcellular elastomer |
| Country of Origin | China |
| Warranty | 1 year |
| Delivery Time | 15-30 days |
| Packaging | Neutral export packaging |
| Custom Service | OEM and custom design support |
KD35-34-111 is the front bumper fitted to CX-5 KE, the first generation sold from 2011 to 2017. KB7W-34-111 is the number used on the later CX-5 KF generation from 2017 onward. Mazda parts catalogues list them as two separate entries rather than a direct supersession, which is why some buyers read them as interchangeable and others do not.
Several European aftermarket suppliers publish a single buffer listing both references as comparable OE numbers. One replacement, for example, is catalogued under KD35-34-111 and KB7W-34-111 and is shown against both CX-5 KE and CX-5 KF, petrol and diesel, spanning roughly 2011 to 2026. That is useful commercial intelligence, but it is a supplier statement about fitment, not a Mazda statement about supersession.
Treat the two numbers as related but not identical until the old part is on the bench. Match the number printed on the original part, or measure the old bumper, and compare it with the drawing before confirming quantity. For fleet work, record which generation each chassis is, so a reorder for a KE car does not drift into KF stock.
If you need to trace the wider family, our polyurethane bump stops range groups these references by OE number and vehicle generation.
For the KE generation, published fitment data covers a broad range of engine and drivetrain combinations.
| Generation | Model / Engine | Period |
|---|---|---|
| KE, GH | 2.0 petrol (KEEFW), 121 kW | 2011-11 to 2017-02 |
| KE, GH | 2.0 AWD petrol (KEEAW), 118 kW | 2011-11 to 2017-02 |
| KE, GH | 2.0 petrol, 110 kW | 2012-02 to 2017-02 |
| KE, GH | 2.2 D diesel (KE2FW), 110 kW | 2012-04 to 2017-02 |
| KE, GH | 2.2 D AWD diesel (KE2AW / KE102), 110-129 kW | 2012-04 to 2017-02 |
| KE, GH | 2.5 AWD petrol, 141 kW | 2015-02 to 2017-02 |
The North American catalogue describes the same part as fitting 2013 to 2016 CX-5 in Grand Touring, Sport and Touring trim, with the 2.0 L and 2.5 L petrol engines. European data starts a little earlier because the CX-5 went on sale in Europe before it reached North America. Both descriptions point at the same KE generation car.
Chinese and Hong Kong parts channels list the same reference as the genuine front suspension bump stopper for the 2013 to 2016 CX-5 KE. That three-source agreement is a reasonable basis for a wholesale lot, provided the old number is confirmed.
A frequent sourcing mistake is treating the bumper as a four-corner item. It is not. KD35-34-111 is a front axle part, and published catalogue entries list its fitting position as front axle, front left and front right. The rear of the CX-5 uses a different bumper with a different length and a different reference.
The Mazda number prefix helps here. In this family, 34 signals a front suspension spring component and 28 signals a rear one. On the CX-5 KF, the front bumper is KB7W-34-111 while the rear item is KB7W-28-1A0. Reading only the trailing digits invites a mismatched order. If a customer asks for a set of four, the front pair and the rear pair will be two distinct part numbers.
The original bumper is a microcellular elastomer. Our production uses polyurethane, which is widely chosen for this application because it holds its shape through repeated compression cycles and resists oil, ozone and temperature swings better than plain rubber.
| Property | Polyurethane (PU) | Conventional rubber |
|---|---|---|
| Compression set after repeated cycles | Low, recovers its shape | Higher, can sag over time |
| Oil and grease resistance | Good | Variable |
| Ozone and weathering | Good | Can crack |
| Load-bearing range | Broad, tunable by density | Narrower |
| Consistency batch to batch | Good with mould control | Depends on compound |
A bumper that has failed usually announces itself with a dull knock over speed humps, a ride that bottoms out more easily, or a torn and crumbling foam body. Left alone, the strut rod, top mount and body structure take loads they were not designed for. Replacing the bumper alongside the dust boot and mount is standard practice during a strut overhaul.
Someone rebuilding a front strut searches for the part by name and dimension, for example front strut bump stop 21.3 mm or jounce bumper 99 mm. Listing the diameters and length openly on the product page is what allows those searches to land.
Wholesale buyers add the sourcing word: strut bump stop manufacturer, jounce bumper wholesale supplier, or bump stop factory China. These buyers are comparing lead time, minimum order quantity and packing more than unit price.
The most precise search is the OE number itself. KD35-34-111 is a fully qualified query, and it is the search that brings qualified traffic because the searcher already knows the part.
Vehicle-led searches follow the pattern Mazda CX-5 front bump stop or CX-5 KE strut bumper. They are useful for buyers who have the car but not the catalogue.
Distributors looking for own-brand packaging ask for custom polyurethane bump stops or OEM design support. We can quote against your drawing, your hardness target and your branding.
Our custom parts service and our chassis and suspension range cover both routes.
Compare the new bumper with the old one for length, bore and outer diameter. Check the dust boot for splits and the strut mount bearing for roughness. A bumper that is compressed is often compressed because something else in the assembly is no longer doing its work.
The bumper seats on the damper rod and is held in position by the assembly around it rather than by a fastener of its own. It does not require coding or electronic reset on this platform. Correct torque on the strut fasteners, applied with the car at normal ride height, is what protects the new part.
Repeated full-load driving on poor roads, a worn damper that allows excess travel, and incorrect assembly that leaves the bumper misaligned account for most early failures. A quality bumper will not compensate for a damper that has already lost its damping force.
The bumper is a low-value, high-frequency item, so freight efficiency matters more than unit cost. We supply in neutral export packaging and can apply your own label and carton print on request. Standard delivery time is 15 to 30 days depending on quantity and finishing requirements. Because the part is small, consolidating it with other suspension references in the same shipment usually improves the landed cost considerably.
For quantity pricing on the complete front strut repair set, see our shock absorber parts range.
They are closely related, but they are catalogued as separate entries for the CX-5 KE and KF generations. Some aftermarket suppliers offer one buffer that covers both. Confirm against the number on the old part before you commit a production quantity.
No. KD35-34-111 is a front axle part. The rear uses a different reference and a different length, for example KB7W-28-1A0 on the KF generation. Order the rear separately.
Two, one per side on the front axle. Mazda diagrams show a required quantity of two. Stock numbers should be planned on that basis, not on a single-unit assumption.
Yes. Polyurethane is widely used for jounce bumpers because it resists compression set and ageing better than conventional rubber, while still providing the progressive cushioning the suspension needs.
If you are sourcing KD35-34-111 for a fleet, a distributor programme or a rebuild line, send us the quantity, the destination port and any drawing or hardness requirement you work to. We will confirm fitment details, packing options and a delivery schedule. The reference is a small part, but it is one that customers reorder, and we treat it as a stock item rather than a special.
