Hyundai Kia Strut Bump Stop 55326-1M000 | OEM Replacement Supplier & Custom Manufacturer

Hyundai Kia Strut Bump Stop 55326-1M000 at a Glance

The Hyundai Kia strut bump stop 55326-1M000 is the rear axle jounce bumper used across a long list of Hyundai and Kia compact models, including the Elantra, i30, Accent, Kia Cerato and Rio. It mounts on the rear shock absorber rod inside the rear coil spring, where it acts as the final and progressive compression stop of the rear suspension. Hyundai catalogues also list it as a coil spring damper, which describes the same moulding.

Because the part is shared across two brands and several generations, it is one of the highest volume rear suspension elastomer items in the Korean aftermarket. A distributor covering Hyundai and Kia lines can hold one reference and serve Elantra MD, i30 GD, Accent RB, Cerato YD and Rio UB enquiries at the same time.

Bonpora supplies this stop under reference 4110160 in moulded polyurethane, produced for wholesale, distributor and private label programmes. The compound resists oil, ozone and road salt, holds its shape over long service intervals and keeps the point at which it controls rear axle travel consistent through the life of the part.

Technical Specification

The 22.5 mm bore accepts the original rear damper rod without an adapter sleeve. The 64.5 mm outside diameter is measured across the widest moulded collar, and the 71 mm length is the free height of the stop before installation. Independent catalogue data for the same OE number records a height of about 70 mm and a unit weight of roughly 110 g, which matches our drawing within normal production tolerance. Where a supplier quotes only one dimension, compare the drawing against the part removed from the vehicle rather than relying on a single figure.

Vehicle Fitment for OE 55326-1M000

This rear stop is specified for the compact and mid size Hyundai and Kia platforms built from the mid 2000s onward. The table below lists the main applications confirmed against European and international parts catalogues.

Engine and power variants recorded against this stop

Catalogue data lists petrol and diesel units from about 69 hp to 204 hp for this application, including 1.2, 1.25, 1.4, 1.5, 1.6, 1.8 and 2.0 litre petrol engines, LPG variants, and 1.1, 1.4, 1.5, 1.6 and 2.0 litre CRDi diesel units. The common factor is the rear suspension specification rather than the engine itself, which is why one stop number covers such a wide model range.

Why the OE number must be confirmed before ordering

Hyundai and Kia changed rear suspension hardware several times within the same model line, and the 55326-0Q000 number is used in parallel on some applications. The safest procurement route is to read the number cast or printed on the old component, or to check the VIN filter offered by the catalogue system, before confirming the line item. For workshop customers we also recommend replacing both sides at the same time, because a new stop on one side and a compressed stop on the other gives uneven rear axle behaviour.

What This Rear Bump Stop Does

A jounce bumper has three jobs, and in a car that regularly runs loaded or on poor roads all three are worked hard.

1. Progressive end of travel cushioning

As the rear spring compresses over a pothole, a speed hump or a full boot, the coil closes onto the stop. Polyurethane deflects progressively, so the last part of the travel becomes rapidly stiffer instead of ending in a metal to metal impact. The result is a controlled, quieter compression rather than a hard knock through the body shell.

2. Shock absorber protection

The rod seal and the internal rebound valving are the parts that suffer when a damper is driven into its own end stop. By absorbing the final travel, the bump stop limits the peak load carried by the rear shock absorber and extends its service life.

3. Spring and rear body protection

Without a stop, coil bind becomes possible during a hard compression and the load path moves into the spring seats and the rear top mount. A correctly sized buffer keeps the spring within its designed travel window and protects the mounting points.

Symptoms of a worn rear stop

• Heavy knocking or a dull thud from the rear axle over short, sharp bumps.
• A sudden, hard jolt at the end of rear suspension travel instead of a progressive feel.
• Visible cracking, crumbling, splitting or oil softening of the old stop during inspection.
• The stop loose on the damper rod, or a missing rubber section.
• Rear ride height that drops further than normal when the car is loaded.

Because the stop is hidden inside the rear coil spring, inspection normally means removing the rear damper or the spring. On these platforms the labour is modest, and renewing both sides at the same time keeps the rear axle balanced.

Polyurethane Compared with Rubber

The original part was moulded in rubber. This replacement is produced in polyurethane, which holds up better in the conditions these cars now see as second hand daily drivers in hot, cold or coastal climates.

The practical benefit is that a polyurethane stop keeps its dimensions over years of service, so the point at which it starts to control axle travel stays consistent instead of drifting as rubber ages. For a distributor supplying Korean vehicle lines, that consistency reduces warranty claims and repeat returns.

Cross Reference Numbers

Buyers often search by the number printed on the box rather than the OE code. The list below shows reference points that correspond to 55326-1M000, confirmed against supplier catalogues.

Cross reference lists are a starting point, not a guarantee. Manufacturers change suppliers across production years, so we advise confirming the OE number taken from the vehicle before ordering, especially where the same nameplate was built in different plants for different markets.

Ordering Options for Wholesale Buyers

Bonpora manufactures and exports suspension elastomer parts for importers, distributors, workshop chains and private label programmes. Several purchasing routes are available for this rear stop.

OE replacement supply

Parts moulded to the original 22.5 x 64.5 x 71 mm envelope, supplied in neutral export packaging or in your own branded cartons. Standard orders ship in 15 to 30 days depending on quantity and carton artwork.

Custom and private label manufacturing

If you need a specific durometer, a different height, a coloured compound or a branded poly bag, tooling can be developed from a drawing or from a sample supplied by the buyer. This is a practical route for distributors who want to differentiate their own line of Korean suspension service parts.

Mixed container programmes

This stop is commonly ordered together with other suspension rubber and elastomer service items in a mixed container. Consolidating the order reduces freight cost per piece and simplifies customs paperwork. Typical companion lines for a Korean programme include front and rear strut mounts, dust boots and coil spring insulators.

Our engineering team can review the reference you are currently supplying and propose an equivalent specification with a drawing for approval before production. For buyers who work from a sample, send the worn part together with the vehicle details and we will confirm the height, bore and material before quoting.

For related suspension elastomer items, see our polyurethane bump stops range, browse the wider auto parts catalogue, or discuss a tailored programme through custom parts.

Installation Notes

1. Lift and support the vehicle safely, then remove the rear wheel on the side being worked on.
2. Support the rear axle and release the lower damper mounting where the workshop manual requires it.
3. Remove the rear coil spring to reach the stop on the damper rod.
4. Pull the old stop off the rod. If it has bonded to the piston rod, cut it away carefully without scoring the rod surface.
5. Clean the rod and the spring seat. Check the damper for oil weeping and the top mount for cracking, and replace worn parts now rather than repeating the labour later.
6. Fit the new stop onto the rod and reseat it in the spring. It should sit square and hold its position without adhesive.
7. Refit the spring, reconnect the damper with new mounting hardware where specified, and torque to the figures in the workshop manual.
8. Repeat on the other side, refit the wheels and have the rear alignment checked after reassembly.

Allow the suspension to settle before the final torque check, and carry out a short road test at low speed over uneven ground to confirm that the axle compresses smoothly with no knocking.

Buyer Checklist Before Ordering

• Confirm the OE number on the vehicle is 55326-1M000, 553261M000 or the family alternative 55326-0Q000.
• Confirm the rear stop free height is about 71 mm and the bore suits the damper rod currently fitted.
• Confirm whether the car runs standard or uprated rear springs, because the stop is matched to the suspension specification.
• Order two pieces per vehicle so that both sides are renewed together.
• State any private label, packaging or durometer requirement when requesting the quotation.

Frequently Asked Questions

Is 55326-1M000 a rear or a front part?

It is a rear axle part. It fits on the rear shock absorber rod inside the rear coil spring, two pieces per vehicle. Front stops on these platforms use different part numbers.

Which Hyundai and Kia models use this bump stop?

Confirmed applications include Hyundai Elantra HD, MD, UD, JK and AD, i30 FD and GD, Accent MC, RB and HC, Verna, Solaris, Veloster, ix20, ix35, Tucson TL and Ioniq AE, plus Kia Cerato LD, TD, YD and BD, Forte, K3, Rio JB and UB, Venga and Shuma. Because fitment changes between model years, confirmation by OE number or VIN is recommended.

Can I replace the stop without replacing the rear shock absorbers?

Yes. A bump stop is a separate service item and can be renewed on its own. If the dampers are leaking or the rear top mounts are cracked, replacing them during the same job avoids repeating the disassembly.

Do you supply this part with custom packaging or a private label?

Yes. Neutral export packaging is standard, and branded cartons, poly bags and labels can be produced to buyer artwork. Custom heights, durometers and colour compounds are also available where a drawing or a sample is provided.

Request a Quote for the Hyundai Kia Rear Strut Bump Stop

Send us the OE number 55326-1M000, or Bonpora reference 4110160, together with the quantity you require and any packaging or material specification. Our team will confirm the correct specification, provide a quotation and a delivery schedule, and support the project through sampling and mass production. Buyers working on other Hyundai and Kia platforms are welcome to send their full suspension parts list for a consolidated offer.