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A Chevrolet Lacetti strut bump stop — also listed in parts catalogues as a suspension bump stop, jounce bumper or rubber buffer for the shock absorber — is the elastomer buffer fitted on the piston rod inside the front suspension strut. When the suspension compresses fully over a pothole or under load, the bump stop engages before metal components can make contact, protecting the damper rod, the rod seal and the strut mount from damage. The part referenced by OEM number 96403109 is the front suspension bump stop for the GM Daewoo J200 platform: the car was launched as the Daewoo Lacetti and Daewoo Nubira in 2002 and was rebranded Chevrolet Lacetti, Chevrolet Nubira and Chevrolet Optra in Europe, the Middle East, Canada, Mexico and Southeast Asia. Because every cycle of full suspension travel works the buffer, it is a regular wear item on high-mileage cars and a stable stock line for parts distributors. This page summarises the specifications, fitment scope, material options and sourcing details that purchasing teams normally verify before placing an order.
Most buyers start with a dimensional check before comparing quotations. The reference part below is manufactured to the original drawing dimensions and is intended as a dimensionally interchangeable replacement for the genuine GM item referenced by 96403109.
| Parameter | Value |
|---|---|
| Product Name | Strut Bump Stop |
| Bonpora Nos | 4110040 |
| OE / OEM Number | 96403109 |
| Position | Front |
| Fitment | Daewoo Lacetti, Chevrolet Lacetti / Nubira (J200 platform, 2002–2012) |
| Size | Φ19 x Φ54.5 x 86 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 |
The stated size Φ19 x Φ54.5 x 86 describes a compact stepped buffer: the bore of 19 mm locates over the damper piston rod, the body diameter of 54.5 mm forms the contact face that engages the strut mount under compression, and the free height of 86 mm sets the remaining travel available before the strut bottoms out. These three values are the practical identifiers for the part, because one OE number can cover several production versions of the same buffer. Always confirm them against the old part or the original drawing before committing to a bulk order — a bore or height deviation of a few millimetres changes the engagement point and can lead to harsh ride complaints or premature damper seal wear after replacement.
The 96403109 number belongs to the front-suspension buffer family of the GM Daewoo J200 platform. Catalogue data lists it for:
The part applies across the 1.4, 1.4 16V, 1.6 and 1.8 petrol engines and the 2.0 diesel (outputs of roughly 91–122 hp), and it is installed on both front struts, one per side. The same item also appears in catalogues under the related GM number 96561749, which reflects a running production change of the same buffer. Aftermarket suppliers typically supply the bump stop together with the front dust cover as a protection kit, with published cross references including KYB 910065, Monroe PK283, Sachs 900 177, Meyle 29-14 740 0001, Optimal AK-735318 and Febest CHD-NUB. Because the same J200 car was also sold in North America as the Suzuki Forenza and Suzuki Reno and in Australia as the Holden Viva under different part numbering, always confirm the OE number or the three key dimensions against the part removed from the vehicle before shipping a bulk consignment.
Procurement teams frequently send nothing but a part number, so the reply from a serious supplier should include a dimensional drawing, a material specification and photos of the finished part. This confirms the quotation is made against the correct tooling rather than a visually similar buffer from another platform. A professional auto parts supplier will match the OE number, the three key dimensions and the material grade in a single reply instead of asking you to re-specify the part.
Bump stops on the J200 front axle deteriorate with age and mileage: the elastomer dries out, crumbles and gradually shortens. Typical replacement triggers are knocking or thudding noises over sharp bumps, a visibly damaged or compressed buffer found during a strut replacement, or an inspection note at periodic roadworthiness testing. Because the bump stop is inexpensive relative to the damper it protects, workshops normally fit a new pair whenever front struts, springs or dust covers are renewed. For wholesalers, this service-driven demand makes the Lacetti and Nubira bump stop a routine stock line rather than a special order.
Original-equipment bump stops are usually moulded from microcellular polyurethane (MPU) or foamed rubber. Both compress progressively and recover, but their long-term behaviour differs, and the differences matter for wholesale distribution where parts may sit in stock for a year or more before installation.
| Property | Microcellular Polyurethane | Conventional Rubber |
|---|---|---|
| Compression set | Low — recovers shape after load | Higher — gradual permanent sag |
| Oil, ozone & salt resistance | Good | Moderate |
| Operating temperature | Typically −40°C to +80°C | Narrower range |
| Load capacity for a given size | Higher | Lower |
| Shelf and service life | Generally longer | Generally shorter |
The trade-off is cost and stiffness tuning. A harder compound shortens the effective travel and transmits more noise into the cabin; a softer compound absorbs more energy but can compress past its design limit under heavy load. For replacement programmes, a medium-density polyurethane matched to the original hardness and the Φ19 x Φ54.5 x 86 mm envelope gives behaviour closest to the factory part.
Buyers who need a non-standard length, diameter or hardness can normally have the part produced to their own drawing. Typical customisation scope includes:
For a custom programme, prepare a dimensioned drawing with tolerances, a target hardness (Shore value or density), the expected annual volume and the required packaging format. Those four items are enough for a factory to quote tooling cost and unit price. More background on the suspension range is available on the Daewoo and Chevrolet auto parts category page.
Replacement bump stops are normally inspected in batches rather than piece by piece, so the inspection standard should be agreed before the order is confirmed. A practical QC checklist for a polyurethane buffer covers dimensional verification against the drawing, hardness testing of the compound, visual inspection for flash, voids and tearing, and a compression-recovery test on sampled units from each batch.
For export shipments, neutral packaging keeps cartons free of third-party branding so the goods can be sold through different distribution channels. Each carton is labelled with the OE number, the Bonpora reference and a batch code, so any field claim can be traced back to its production run without opening the boxes.
To receive an accurate price and lead time, send the OE number together with the required quantity, the destination port and the packaging requirement. If the part number is unknown, a photograph of the old bump stop next to a ruler is usually enough to identify the correct item.
Yes. The reference part is produced to the original dimensions Φ19 x Φ54.5 x 86 mm and is intended as a dimensionally interchangeable replacement for applications using OE number 96403109. We recommend confirming the three key dimensions against the old part before ordering in bulk.
Catalogue data lists it as a front suspension bump stop for the GM Daewoo J200 platform: Daewoo Lacetti hatchback and Daewoo Nubira saloon/estate from 2002, and the rebranded Chevrolet Lacetti and Chevrolet Nubira built 2003–2012 across the 1.4, 1.6, 1.8 petrol and 2.0 diesel engines. Chevrolet Optra applications in Canada, Mexico, Thailand and the Middle East (2004–2010) and the Daewoo Gentra UZ are also covered. The related GM number 96561749 refers to the same item. Because catalogue fitment lists differ slightly between regions, confirm the exact application by VIN before shipment.
The bump stop and the dust cover are separate items, and each can be quoted and shipped on its own. Most buyers order them together as a front protection kit because workshops replace both at the same strut service — this is also how most aftermarket catalogue numbers for the Lacetti and Nubira are structured. If you need both, request a combined quotation so the packing list matches your sales format.
Yes. Custom length, bore, body diameter and polyurethane density are available with OEM and custom design support; provide a drawing with tolerances and the expected order volume to receive a tooling and unit price. Minimum order quantity depends on whether the item is produced from stock tooling or as a custom build. Standard delivery lead time is 15–30 days after order confirmation, and replacement parts are supplied with a 1-year warranty against manufacturing defects, excluding damage from incorrect installation or use beyond the rated load.
Send your required quantity and destination port for a quotation, or request a sample to verify fitment before committing to a full order. Enquiries quoting OE number 96403109 are answered with specification, price and lead time in a single reply.
Contact us for a quote on Chevrolet and Daewoo suspension bump stops — OEM and custom design support available.
