High quality shock absorber 8W0413031 AA for FAW Audi A4 S4 Avant and quattro

Standard Passive Suspension Component for Consolidated Bulk Orders

100% OEM Precise Matching, Direct Bolt-On Installation Without Modification

Full Compatible Vehicle List

1. Domestic FAW Audi A4L B9 sedan / A4 Avant (2017–2025) FWD & quattro all-wheel drive standard suspension
2. FAW & Imported Audi S4 B9 sedan / S4 Avant quattro (2017–2025)
3. Shared platform models: Audi A5 F5, S5 Sportback/Cabriolet

Matching Powertrains

Installation Position

Optimized Heavy-Duty Structural Design

1. High-pressure nitrogen sealed twin-tube structure: Balanced compression and rebound damping performance, reliable anti-fade performance during long-distance highway and mountain driving
2. Seamless cold-drawn cylinder tube + hard chrome plated piston rod: Wear-resistant and rust-proof, effectively prevent hydraulic oil leakage under frequent suspension compression
3. Multi-layer fluorine rubber composite oil seal: Resist hydraulic oil erosion and high-low temperature anti-aging to extend overall service life
4. Integrated yellow PU impact buffer + textile reinforced dust boot: Block gravel scratches on the piston rod and eliminate metal collision noise at full suspension compression stroke
5. Galvanized anti-corrosion top pin and bottom clamping bushing: Resist erosion from rain, snow and winter road salt
6. Complete one-piece shock strut assembly, supplied with standard installation hardware for direct replacement

Core Vehicle Handling & Riding Comfort Functions

1. Output stable fixed damping force to balance soft smooth city cruising and rigid stable high-speed cornering handling for mid-size luxury sedans and performance Avant wagons
2. Suppress excessive spring rebound after hitting road bumps, eliminate continuous front-end floating shaking
3. Reduce front body tilt during sharp lane changes and turning, improve vehicle road holding and driving safety
4. Filter harsh road vibration transmitted into the cabin, upgrade premium riding comfort of FAW Audi A4/S4 series
5. Prevent irregular cupped wear on front tire treads and extend tire service cycle
6. Maintain factory-standard vehicle ride height, avoid unilateral front suspension sinking caused by shock absorber failure

Common Solvable Vehicle Faults

• Front end bounces repeatedly multiple times after crossing speed bumps and potholes
• Obvious metal clunk knocking noise from front wheel arches on uneven roads
• Severe front body tilt and unstable steering during high-speed lane changes
• Visible oil stains and hydraulic leakage on the shock absorber cylinder outer wall
• Cupped scalloped uneven wear on front tire tread surfaces
• Obvious nose diving of the whole vehicle during heavy emergency braking

Brief Step-by-Step Installation Guide

Required Tools

1. Park vehicle on flat ground, lift front axle and fix firmly with jack stands, remove front wheel.
2. Use spring compressor to pre-compress front coil spring to release suspension tension.
3. Loosen top pin fixing nut and bottom strut clamping bolt, take out the old shock strut assembly.
4. Thoroughly clean rust, brake dust and dirt on suspension mounting brackets and axle contact surfaces.
5. Install new 8W0413031AA shock absorber, align top pin and bottom clamping position accurately.
6. Tighten all mounting fasteners to factory specified torque values.
7. Slowly release the spring compressor, reinstall front wheel and lower vehicle fully to the ground.
8. Manually press down front vehicle corners repeatedly for slow compression tests to check abnormal collision noise.
9. Complete low-speed road test to verify stable damping performance without bouncing or abnormal noise.

Strict Factory Testing & Stable Spot Supply