One-stop Purchase Upper Left Rear Control Arm 4M0 505 397 R for German Porsche Cayenne E3

This full rear upper left control arm with OE number 4M0 505 397 R is a core heavy-duty suspension component developed on the shared MLB Evo platform, perfectly matching German-made Porsche Cayenne E3 (9YA/9YB) 2017+, also interchangeable with Audi Q7/Q8, VW Touareg, Bentley Bentayga. It is a must-stock chassis spare part for repair chains and cross-border wholesalers to realize mixed one-stop bulk procurement with other suspension arms, stabilizer links and wheel hubs.

Core Selling Points

Ideal for one-stop mixed sourcing with sustained repeat bulk orders

Rear upper control arms are high-frequency replacement parts for luxury large SUV chassis maintenance. Original arms suffer bushing aging, rubber cracking and loose clearance after long mileage of heavy load, high-speed driving and off-road use, triggering chassis knocking, wheel deviation and uneven tire wear. Luxury auto repair shops and global spare parts distributors often combine this control arm with front/rear control arms, brake parts and axle components for one-stop orders to cut procurement cycles and logistics costs, with stable year-round repeat orders and high profit margins for dealers.

100% OE dimensional replication, direct bolt-on installation without modification

Manufactured strictly following VAG & Porsche original mold, overall length, mounting hole spacing, flange position and integrated rubber bushing size standards. Forged aluminum arm body, two built-in rubber-metal bushes fully consistent with genuine OEM specifications. No cutting, shimming or reaming required during replacement; perfectly connects rear subframe and wheel knuckle, greatly saving chassis alignment and installation labor hours.

Full compatible vehicle range

• Porsche: Cayenne E3 9YA/9YB (2017–present)
• Audi: Q7 4M, Q8, SQ7, RSQ8
• Volkswagen: Touareg CR7
• Bentley: Bentayga

Reinforced lightweight high-load forged aluminum structure

1. Integral forged aviation-grade aluminum alloy arm body, light weight with ultra-high torsion resistance, anti-bending under full-load climbing and bumpy roads
2. Thickened dual-layer natural rubber metal composite bushings, added anti-oxidation coating, resistant to road salt, oil and high temperature aging
3. Precision pressing fit between bush and arm body, no loose separation after long-term vibration
4. Stress relief machining on arm surface to eliminate internal processing stress, avoid deformation in long-term use

Restore original suspension geometry & driving stability

Accurately fix rear wheel camber and track parameters, effectively limit excessive wheel swing during cornering and braking. Eliminate vague steering, body roll and abnormal rear-end jitter, recover factory-level handling, comfort and tire wear uniformity for heavy luxury SUVs.

Fully resolve common faulty control arm symptoms

Perfectly fixes typical chassis problems:

• Clunking/thudding noise from rear suspension over speed bumps and rough roads
• Vehicle pulling left/right during driving, frequent wheel alignment failure
• Severe unilateral tire inner/outer shoulder wear
• Loose rear end, unstable high-speed driving
• Cracked, detached and leaking oil original rubber bushings

Rigorous multi-stage factory testing & abundant mixed spot inventory

Every control arm undergoes tensile torsion test, rubber aging salt spray test, dimensional tolerance calibration and road vibration simulation test before delivery, compliant with TS16949 international automotive quality standards. Mass ready stock supports mixed one-stop bulk orders of all surrounding chassis spare parts. Custom neutral packaging and private label OEM services are available for cross-border wholesale customers.