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CP247
Gallery
BrandTRIALLI
MPNAG 18051
OE refs19
SKU4772-AG 18051
GTIN / EAN4680295023258

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Details

SpecificationValue
BrandTRIALLI
MPNag18051
Fitting PositionFront Axle
Diameter [mm]50 mm
Weight [kg]4.14 kg
Thread SizeM14x1.5
Length 1 [mm]378 mm
Length 2 [mm]558 mm
Piston Rod Diameter [mm]22 mm

OE/OEM numbers (19)

Search by this OE number to find compatible parts

Where this part fits

Original-fit position for OE 1J0413031AE. The red ring marks where this part installs on the vehicle.

Shock absorbers F 1J-X-200 001>> 1J-Y-800 000* If necessary use in pairs — Golf Golf A4 (Typ 1J) (1998–2002) — suspension Shock absorbers Anti-roll bar
Golf Golf A4 (Typ 1J) (1998–2002) · suspension Shock absorbers Anti-roll barPosition 22

About this product

TRIALLI shock absorber (AG 18051) restores factory damping characteristics by controlling spring oscillation on both compression and rebound strokes, recovering steering precision and reducing body roll. Damping configuration — Fitting Position: Front Axle, Shock Absorber Type: Aluminium, Shock Absorber Design: Aluminium, Shock Absorber System: Aluminium — is tuned to the original suspension geometry so spring rates and ride height are unaffected, preserving the manufacturer's comfort and handling balance. Mounting dimensions, piston diameter, and stroke length replicate the OEM unit on AUDI, SEAT, SKODA, VW applications, allowing a straight-swap installation without drilling or bracket modification. Supersedes manufacturer part numbers: 060514HB, 07.30.127, 101268, 103898 and 90 more. TRIALLI dampers are gas-pressure charged, zero-leakage tested on a servo-hydraulic rig, and carry a 2-year unlimited-mileage warranty against manufacturing defects. Shock absorbers gradually lose damping force over time and should be inspected at 50,000 miles and replaced by 80,000–100,000 miles — even if they are not visibly leaking, internal valve wear reduces their effectiveness. Warning signs include excessive body roll in corners, nose-dive under braking, rear-end squat during acceleration, uneven tyre wear, and a bouncy or floaty ride — a simple bounce test (push down on each corner and release) can reveal weak dampers. Shock absorber replacement is an intermediate DIY task that requires spring compressors (for strut-type assemblies), a torque wrench, and penetrating oil for corroded fasteners — allow 2–3 hours per axle. When selecting shock absorbers, match the damper type (twin-tube, monotube, or gas-pressurised) to the original specification — upgrading to a different type can alter ride height and handling characteristics. Always replace shock absorbers in pairs (both sides of the same axle) to maintain balanced handling, and have the wheel alignment checked afterwards — worn dampers often allow geometry to drift out of specification. Every part is dispatched from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.

Suitable cars

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VAICOV10-1701

Shock Absorber TRIALLI AG 18051compatible car models

Car modelsAUDI: A3 (8L1); SEAT: LEON (1M1), TOLEDO II (1M2); SKODA: OCTAVIA I (1U2), OCTAVIA I Combi (1U5); VW: BORA I (1J2), BORA Variant (1J6), GOLF IV (1J1), GOLF IV Variant (1J5), NEW BEETLE (9C1, 1C1), NEW BEETLE Convertible (1Y7)
Engines1.6; 1.4 16V; 1.4
Year of manufacture1996-2013
Manufacturer article number (MPN)AG 18051
OE part numbers1J0400054AF, 1J0412021CJ, 1J0413031AA, 1J0413031AB, 1J0413031AC, 1J0413031AE, 1J0413031AM, 1J0413031BC, 1J0413031BH, 1J0413031CH, 1J0413031CP, 1J0413031CR, 1J0413031DQ, 1J0413031DR, 1J0413031N, 1J0413031P, 1J0413031Q, 1J0413031R, 1JO413031BJ
Compatibility check

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Description and what's included

TRIALLI ag18051 . Diameter [mm]: 50 mm. Fitting Position: VA. Length 1 [mm]: 378 mm. Length 2 [mm]: 558 mm. Piston Rod Diameter [mm]: 22 mm. Quantity: 1. Shock Absorber Design: 2. Shock Absorber Mounting Type: 10

What's included:
  • 1x Shock Absorber
Shipping, returns, warranty

Free UK delivery on orders over £99.00. Express and standard shipping available.

  • Standard delivery: 2-5 business days
  • Express delivery: 1-2 business days
  • Free returns within 14 days
  • All parts backed by manufacturer warranty

Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.

Frequently Asked Questions

Is this Shock Absorber compatible with my car?

This Shock Absorber fits AUDI, SEAT, SKODA, VW vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.

What specifications does this TRIALLI Shock Absorber have?

This TRIALLI Shock Absorber has the following specifications: Fitting Position: VA; Shock Absorber Type: 2; Shock Absorber Design: 2; Shock Absorber System: 2; Shock Absorber Mounting Type: 3; Shock Absorber Mounting Type: 10. Check the full specifications table above for complete details.

What OE part numbers does this Shock Absorber replace?

This Shock Absorber replaces OE part numbers: 1J0400054AF, 1J0412021CJ, 1J0413031AA, 1J0413031AB, 1J0413031AC, 1J0413031AE, 1J0413031AM, 1J0413031BC and 11 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.

How much does a Shock Absorber cost?

Shock Absorber prices vary depending on brand, specifications, and vehicle compatibility. Check the current price above for this TRIALLI Shock Absorber. All parts come with our 14-day money-back guarantee.

How do I know when to replace my Shock Absorber?

Look for excessive bouncing over bumps, nose-diving during braking, uneven tyre wear, fluid leaks on the shock body, or poor handling. Shocks should be inspected every 50,000 miles.

What tools do I need to replace a Shock Absorber?

Tools needed: floor jack, axle stands, 18-21mm socket for wheel bolts, spring compressor (if top mount must be removed), 17-19mm open-end spanner for shock piston nut, torque wrench. Difficulty: Moderate DIY. Safety warning: Coil springs store enormous energy -- only use purpose-built automotive spring compressors rated for the load. A spring released unexpectedly can cause fatal injury. Never improvise with non-rated tools.

Can I use this part as a replacement for OE 1J0400054AF?

Yes, this TRIALLI Shock Absorber is a direct replacement for OE part number 1J0400054AF. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.

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