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CP247
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BrandSIAAM
MPN345276G
OE refs18
SKU6322-345276G

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Details

SpecificationValue
BrandSIAAM
MPN345276g
Bore Diameter [mm]31 mm
Pin Diameter [mm]16 mm

OE/OEM numbers (18)

Search by this OE number to find compatible parts

Where this part fits

Original-fit position for OE 4B0412031BT. The red ring marks where this part installs on the vehicle.

Gas shock absorber marked with: ***** Caution Hazardous ****** — A6 A6/S5 Avant Quattro C5 (Typ 4B) (2002–2004) — Shock absorbers
A6 A6/S5 Avant Quattro C5 (Typ 4B) (2002–2004) · Shock absorbersPosition 2

About this product

SIAAM shock absorber (345276G) restores factory damping characteristics by controlling spring oscillation on both compression and rebound strokes, recovering steering precision and reducing body roll. Damping configuration — Shock Absorber Type: Aluminium, Shock Absorber Design: Cast Iron, Shock Absorber System: Aluminium, Shock Absorber Mounting Type: Cast Iron — 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, VW applications, allowing a straight-swap installation without drilling or bracket modification. Supersedes manufacturer part numbers: 01881, 05663, 104165, 104322 and 263 more. SIAAM 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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Shock Absorber SIAAM 345276Gcompatible car models

Car modelsAUDI: A4 B5 (8D2), A4 B5 Avant (8D5), A6 C5 (4B2, 4B4), A6 C5 Avant (4B5, 4B6); VW: PASSAT B5 (3B2), PASSAT B5 Variant (3B5)
Engines1.6; 1.8
Year of manufacture1994-2006
Manufacturer article number (MPN)345276G
OE part numbers4B0412031AN, 4B0412031AP, 4B0412031BC, 4B0412031BD, 4B0412031BP, 4B0412031BQ, 4B0412031BT, 4B0412031CA, 4B0412031CB, 4B0412031CE, 4B0412031K, 4B0412031L, 8D0413031AD, 8D0413031AG, 8D0413031BB, 8D0413031BC, 8D0413031BP, 8D0413031BQ
Compatibility check

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Description and what's included

SIAAM 345276g . Bore Diameter [mm]: 31 mm. Pin Diameter [mm]: 16 mm. Shock Absorber Design: 3. Shock Absorber Mounting Type: 3. Shock Absorber Mounting Type: 6. Shock Absorber System: 2. Shock Absorber Type: 2

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, 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 SIAAM Shock Absorber have?

This SIAAM Shock Absorber has the following specifications: Shock Absorber Type: 2; Shock Absorber Design: 3; Shock Absorber System: 2; Shock Absorber Mounting Type: 3; Shock Absorber Mounting Type: 6; Bore Diameter [mm]: 31 mm. 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: 4B0412031AN, 4B0412031AP, 4B0412031BC, 4B0412031BD, 4B0412031BP, 4B0412031BQ, 4B0412031BT, 4B0412031CA and 10 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 SIAAM 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 4B0412031AN?

Yes, this SIAAM Shock Absorber is a direct replacement for OE part number 4B0412031AN. 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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