3266 Products
KYB Car Parts
KYB is a suspension specialist whose European aftermarket programme covers shock absorbers, coil springs, strut mounting kits and protection kits. This collection reflects that focus closely. Coil springs form the largest part of the range, followed by shock absorbers, complete or partial strut-support mount kits, dust covers, bellows, bump stops and a smaller number of bearings, spring seats and related pieces.
Choosing a KYB part requires more than identifying the make and model. Front and rear axles use different components, and front struts may be handed left and right. The same vehicle can have standard, sports, heavy-duty, raised or self-levelling suspension, with further differences for engine weight, body style, transmission and optional chassis packs. For springs, compare the product reference and application notes rather than relying on free length or coil count alone; wire profile, end shape and working rate are also part of the design.
KYB’s damper families include twin-tube oil, twin-tube gas, monotube high-pressure gas and adjustable designs, but the correct family depends on the listed application. A Gas-A-Just or Ultra SR reference should not be assumed to substitute for an Excel-G part unless KYB identifies it for that vehicle. Mounts and protection kits perform separate jobs: the mount connects the strut or damper to the body, while the bellows shields the piston rod and the bump stop limits compression travel.
Inspect the whole corner before ordering. A leaking or weak damper may be accompanied by a cracked spring, noisy bearing, compressed bump stop, torn gaiter or deteriorated mount. KYB advises replacing broken or fatigued springs in axle pairs, and suspension work should be followed by checks for correct seating, fastener torque, ride height and wheel alignment where the repair affects geometry. Use the vehicle identification details and full technical description to narrow the options. Relevant KYB products appear below.
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KYB suspension range overview
KYB’s automotive aftermarket range is centred on suspension control. In this collection, coil springs are the largest family and shock absorbers are the next substantial group. The supporting range includes strut top mounts, mount repair kits, rolling bearings, dust covers, protective bellows, bump stops and occasional spring seats or buffers. These are not decorative accessories around the main components; each affects how a spring-and-damper assembly locates, moves and survives exposure to the road.
KYB states that it supplies shock absorbers to vehicle manufacturers and uses the same factories and technology for its aftermarket dampers. That brand background explains its concentration on hydraulic control, but it does not make every KYB damper interchangeable. Each reference is valved, dimensioned and mounted for stated applications. The correct task is to preserve the intended suspension arrangement for the exact vehicle, unless a documented KYB alternative or upgrade is listed.
| KYB family represented here | What it does | Primary selection points |
|---|---|---|
| Coil springs | Carry vehicle weight, establish ride height and absorb road inputs | Axle, body and engine variant, suspension option, spring design, handedness |
| Shock absorbers and struts | Control spring and wheel movement | Front/rear, left/right, mounting form, damper family, chassis specification |
| Suspension mounting kits | Connect the damper or strut to the chassis and isolate movement | Bearing inclusion, fixing arrangement, axle position, kit contents |
| Protection kits | Shield the piston rod and limit compression travel | Bellows shape, bump-stop length, rod and body dimensions |
| Individual support parts | Replace a bearing, cap, seat or buffer where catalogued separately | Assembly position and whether the item is already included in a kit |
Understanding KYB shock absorber families
The word shock absorber covers several constructions. KYB lists Premium oil dampers, Excel-G twin-tube gas dampers, Gas-A-Just monotube high-pressure gas dampers, Ultra SR high-pressure gas products for performance applications, AGX adjustable gas units and K’lassic twin-tube oil or gas products for relevant older applications. Some are complete struts, others are separate dampers or cartridges. A photograph cannot reliably identify the internal design or valving.
A twin-tube unit has an inner working cylinder and an outer reservoir, while a monotube unit contains the working piston and gas arrangement in one main cylinder. Those layouts influence packaging and behaviour, yet construction type alone does not determine suitability. Stroke, extended and compressed length, rod diameter, mounting eyes or pins, spring-seat position and valving must all correspond to the vehicle. Use the exact KYB application, not a general preference for gas pressure or a performance label.
Strut listings require special attention to side. A front MacPherson strut can incorporate brackets for the hub carrier, brake hose or wheel-speed wiring, so left and right references may differ. Rear shock absorbers are often not handed, but that should be established from the listing rather than assumed. Electronic, adaptive, self-levelling or air-suspension systems may need components outside a conventional passive-damper range.
| Damper description | Official KYB range definition | Practical interpretation |
|---|---|---|
| Premium | Oil shock absorbers, struts and cartridges | Select only where the reference is catalogued for the vehicle |
| Excel-G | Twin-tube gas shock absorbers, struts and cartridges | Confirm axle, side and chassis option for the individual number |
| Gas-A-Just | Monotube high-pressure gas shock absorbers | Do not treat pressure or construction as universal compatibility |
| Ultra SR | High-pressure gas products for performance cars | Check that the application suits the intended suspension configuration |
| AGX | Adjustable gas shock absorbers, struts and cartridges | Follow KYB adjustment and fitment information for the exact unit |
Coil spring evidence: dimensions are only part of the match
Catalogue descriptions for KYB springs commonly identify front or rear axle, coil-spring design and, where available, weight, wire thickness, outer diameter and free length. Some applications specify standard suspension. These details are valuable confirmation points, but selecting a spring by measurements alone is unsafe because springs with similar free dimensions can have different rates, taper-wire profiles, end forms or installed loads.
KYB documents hot and cold coiling, shot peening, surface preparation and protective coating across its spring programme. It also lists side-load or “banana” spring technology and OE-design taper-wire miniblock springs in relevant ranges. These technologies are application-dependent. A constant-wire alternative and a taper-wire spring should not be mixed across an axle unless the catalogue expressly defines the pair and replacement arrangement.
Ride height is influenced by the spring specification, but also by spring seats, rubber pads, vehicle load and the condition of the opposite side. After fitting, verify that each spring end sits correctly in its seat and that any isolator is correctly located. A spring fitted against the wrong stop can bow, make noise or sit at the wrong height.
Vehicle differences that alter spring selection
- Hatchback, estate, saloon, convertible and light-commercial bodies can carry different rear axle loads.
- Petrol, diesel, hybrid and battery layouts change corner weight.
- Manual and automatic transmissions may be separated in application data.
- Factory sports, rough-road, heavy-duty or lowered chassis options need their specified spring.
- Four-wheel drive can use different front or rear suspension hardware from two-wheel drive.
- Production changes may occur within one registration year.
| Inspection finding | Related parts to assess | Reason |
|---|---|---|
| Broken coil or low corner | Opposite spring, seats, isolators and damper | Paired condition and correct support affect ride height and load sharing |
| Oil on damper body | Piston rod, seal area, protection kit and mount | Road contamination or rod damage can accompany leakage |
| Knock when steering | Top mount, strut bearing, spring seating and fixings | The spring must rotate or articulate without binding in many front struts |
| Harsh impact at full compression | Bump stop, spring and damper travel | The stop controls the final compression phase |
| Uneven tyre contact or poor control | Dampers, springs, joints, tyres and alignment | Several suspension faults can produce similar road behaviour |
Mounting and protection kits
A suspension mount forms the connection between the shock absorber or strut and the vehicle body. On a steering axle it may include a bearing that allows the strut to turn. Worn rubber can transmit vibration or permit unwanted movement; a rough bearing can make steering noisy or cause the spring to wind up and release. KYB advises considering mounting kits whenever shock absorbers are replaced and when steering becomes hard or noisy.
A protection kit serves a different purpose. The bellows or dust cover protects the polished piston rod and seal area from water, road dirt and stone damage. The bump stop limits suspension travel during heavy compression. KYB recommends changing protection kits with shock absorbers. Before ordering, establish whether the listing contains both bellows and bump stops, how many are supplied, and whether a top mount or bearing is separate.
Replacement approach and workshop checks
KYB’s spring guidance says broken or fatigued springs should be replaced in axle pairs. Pair replacement helps keep spring characteristics and ride height balanced. Dampers are also normally renewed across an axle so damping response is comparable side to side. The vehicle manufacturer’s procedure remains controlling, particularly for adaptive systems or unusual axle designs.
Coil springs store considerable energy. MacPherson strut dismantling requires a suitable spring compressor positioned and loaded correctly; improvised methods can cause severe injury. Fasteners must be tightened at the specified stage and torque. Where a strut has been detached from the hub carrier, or where suspension geometry is otherwise disturbed, check wheel alignment after assembly. Confirm brake hoses and sensor cables are routed through their proper brackets without twist or tension.
After the vehicle is standing on level ground, compare ride height left to right using the manufacturer’s datum where available. A short settling movement may be needed, but a pronounced difference calls for reinspection of spring seating, part numbers, pads and mounts. Road testing should be controlled and should confirm steering return, absence of knocks and stable braking without using the test as a substitute for visual and torque checks.
KYB parts and the MOT
Great Britain’s MOT inspection includes suspension springs, shock absorbers and suspension attachment points, as well as arms and joints. A fractured spring, insecure component, serious leakage or a damper with negligible effect can affect roadworthiness according to condition and severity. The test does not certify that an older suspension performs as new, so deterioration should be addressed when found rather than deferred until a test date.
Frequent errors to avoid
- Mixing standard and sports-suspension references on the same axle.
- Using spring length and diameter as the sole identification method.
- Ordering one front strut without checking whether the part is left- or right-handed.
- Reusing a split bellows or collapsed bump stop with a new damper.
- Assuming a mount kit always includes its bearing or every fixing.
- Allowing a brake hose or sensor cable to twist around the strut.
- Omitting an alignment check after dismantling geometry-setting joints.
KYB questions and answers
Q: What is the main KYB range in this collection?
A: It is principally coil springs and shock absorbers, supported by top mounts, bearings, dust covers, bellows and bump stops.
Q: What is the difference between Excel-G and Gas-A-Just?
A: KYB defines Excel-G as twin-tube gas and Gas-A-Just as monotube high-pressure gas. Choose by the listed vehicle application, not construction alone.
Q: Should a broken KYB spring be replaced in a pair?
A: KYB advises axle-pair replacement for broken or fatigued coil springs to maintain balanced support and behaviour.
Q: Can two springs with the same free length be interchangeable?
A: No. Wire form, rate, end shape, taper and designed load may differ even when basic measurements look alike.
Q: Are front KYB struts handed?
A: Some are. Brackets and hub-carrier fixings can make distinct left and right parts, so check the fitting position.
Q: What does a KYB protection kit contain?
A: It commonly combines dust protection and a bump stop, but contents vary. Verify the exact listing and quantity.
Q: Is a top-mount bearing always included with the mount?
A: No. Some kits include it and some applications list the bearing separately. The product contents must be checked.
Q: Does light misting on a damper mean it has failed?
A: Not every film is active leakage. Clean and inspect the unit, assess damping and follow the manufacturer’s condition criteria.
Q: Why inspect bump stops during damper replacement?
A: They limit compression travel. A crumbling or collapsed stop can allow harsh bottoming and should not be hidden under a new bellows.
Q: Will new shock absorbers restore incorrect ride height?
A: Conventional dampers mainly control movement; the springs establish normal ride height. Inspect springs, seats and vehicle loading.
Q: Is wheel alignment needed after a strut replacement?
A: It is prudent whenever geometry-setting connections have been disturbed, and essential where the repair procedure specifies adjustment.
Q: What vehicle information gives the best KYB match?
A: Use VIN, production date, engine and body type, axle position and the exact factory suspension option, then confirm the KYB number.