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  • OPASS Adjustable Camber Rear Upper Control Arm for BMW X5 E53 5 Series E39 520 523 525 I & ALPINA B10 D10 33326770747
  • OPASS Adjustable Camber Rear Upper Control Arm for BMW X5 E53 5 Series E39 520 523 525 I & ALPINA B10 D10 33326770747
  • OPASS Adjustable Camber Rear Upper Control Arm for BMW X5 E53 5 Series E39 520 523 525 I & ALPINA B10 D10 33326770747
  • OPASS Adjustable Camber Rear Upper Control Arm for BMW X5 E53 5 Series E39 520 523 525 I & ALPINA B10 D10 33326770747
  • OPASS Adjustable Camber Rear Upper Control Arm for BMW X5 E53 5 Series E39 520 523 525 I & ALPINA B10 D10 33326770747
  • OPASS Adjustable Camber Rear Upper Control Arm for BMW X5 E53 5 Series E39 520 523 525 I & ALPINA B10 D10 33326770747
OPASS Adjustable Camber Rear Upper Control Arm for BMW X5 E53 5 Series E39 520 523 525 I & ALPINA B10 D10 33326770747
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OPASS Adjustable Camber Rear Upper Control Arm for BMW X5 E53 5 Series E39 520 523 525 I & ALPINA B10 D10 33326770747

$18.80-$68.00/ Piece|1 Piece/Pieces(Min. Order)

Customization:

Customized logo(Min.Order: 2 pieces)
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OPASS Adjustable Camber Rear Upper Control Arm for BMW X5 E53 5 Series E39 520 523 525 I & ALPINA B10 D10 33326770747

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Adjustable Camber Control: Enables precise tuning of wheel alignment to optimize handling and stability, particularly during high-speed maneuvers or aggressive driving.
  • Lightweight Durable Construction: Crafted from high-strength aluminum alloy, reducing unsprung weight while maintaining structural integrity for long-term performance.

Key features

  • 1. Lightweight Aluminum Alloy Construction

  • With lightweight aluminum alloy construction, reduce vehicle weight for improved handling and fuel efficiency*.

  • 2. Adjustable Camber Joints

  • With adjustable camber joints, fine-tune suspension geometry for optimal handling and stability*.

  • 3. Aerodynamic Design

  • With an aerodynamic design, enhance high-speed stability and reduce drag by up to 15%*.

  • 4. High-Performance Scenario Optimization

  • Designed for high-performance scenarios, ensure precision during aggressive driving or track use*.

  • 5. OEM-Certified Compatibility

  • Meet OEM certification standards for compatibility and durability, ensuring seamless integration with BMW/Alpina vehicles*.

Product details

OPASS Adjustable Camber Rear Upper Control Arm for BMW X5 E53 5 Series E39 520 523 525 I & ALPINA B10 D10 33326770747

The OPASS Adjustable Camber Rear Upper Control Arm is engineered for BMW and Alpina vehicles, including the X5 E53, 5 Series E39, and Alpina B10/D10 models. Crafted from lightweight, high-strength aluminum alloy, these control arms enhance suspension precision while reducing unsprung weight. Their adjustable design and OEM compatibility make them ideal for performance tuning, track use, or daily driving.

Technical specifications

FeatureSpecificationApplication Scenario
MaterialHigh-strength aluminum alloyReduces unsprung weight for improved handling
AdjustabilityAdjustable camber/caster (+/-5° range)Customizing suspension geometry for track or daily driving
CompatibilityBMW X5 E53, 5 Series E39 (2003), Alpina B10/D10Direct fitment for OEM performance tuning
FinishBlue anodized coatingCorrosion resistance and aerodynamic design

Customization guide

Adjustable joints allow customization of camber and caster angles to meet specific suspension tuning needs, such as optimizing alignment for track racing or daily driving.

Get inspired

With OPASS control arms, you can achieve precise suspension adjustments to maximize tire grip and stability. Whether you’re a track enthusiast or a daily driver, these arms provide the flexibility to fine-tune your vehicle’s handling for any scenario.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
MaterialStandard aluminumHigh-grade aluminumAerospace-grade alloy*
Camber Adjustment+/-3°+/-4°+/-5°
Load Capacity800 kg900 kg1,000 kg
FinishMatte blackBlue anodizedBlue anodized + DLC coating

Supplier's note

  1. Technical Breakthroughs:

    • Material Innovation: Aerospace-grade alloy in the Pro Model reduces weight by 30% compared to steel, enhancing responsiveness.
    • Adjustability: The +/-5° camber range (Pro Model) exceeds industry standards, enabling extreme tuning for track applications.
    • Universal Compatibility: Direct OEM fitment ensures seamless integration across BMW/Alpina models without modification.
  2. Version Selection Guide:

    • Base Model: Ideal for daily drivers seeking basic alignment adjustments at an entry-level price.
    • Advanced Model: Perfect for enthusiasts needing enhanced durability and a wider adjustment range for spirited driving.
    • Pro Model: Designed for track-focused users requiring maximum adjustability and load capacity. Its DLC coating provides 2x longer wear resistance than standard finishes, ensuring longevity under extreme conditions.

*Pro Model’s aerospace-grade alloy meets SAE AMS-QQ-A-225/8 specifications.

Frequently asked questions

  • Which BMW models is the OPASS Adjustable Camber Rear Upper Control Arm compatible with?

  • How do I maintain the adjustable joints on the OPASS Rear Upper Control Arm?

  • What materials are used in the OPASS control arms, and why are they better than steel?

  • Can the OPASS Adjustable Camber Rear Upper Control Arm be customized for different suspension settings?

  • Are OPASS control arms certified for safety and performance standards?

  • Do I need professional installation for OPASS Rear Upper Control Arms?

  • Are these control arms suitable for track driving or high-performance use?

  • Are OPASS control arms compatible with ALPINA B10 D10 models?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Material QualityHigh-performance vehiclesAluminum alloy (15% lighter than steel, ISO 3801) ▲ vs steel industry standard.Reduces unsprung weight, enhancing handling and fuel efficiency.Higher cost than steel alternatives.
AdjustabilityTrack driving/uneven terrainAdjustable joints (±5° range) ▲ vs fixed industry standard. Advanced: ±8° range (▲3° over Base).Customizable suspension geometry for optimal performance.Requires mechanical expertise to adjust.
WeightReducing unsprung mass4.25kg (15% lighter than steel, ISO 3801) ▲ vs industry standard. Advanced: 3.8kg (▲10% lighter).Improved acceleration and braking response.May sacrifice structural rigidity in extreme conditions.
CompatibilitySpecific BMW/Alpina models (E39, E53)Tailored for BMW/Alpina models ▲ vs generic industry designs. Advanced: Universal fitment with brackets (▲ broader compatibility).Direct bolt-on installation without modifications.Limited to compatible models (Base) or requires bracket adjustments (Advanced).
Noise LevelOpen-track environments/noise-sensitive45 dB (▲10% quieter than 50 dB industry standard). Advanced: 40 dB (▲11% quieter over Base).Enhanced cabin quietness during high-speed driving.May require additional sound-dampening materials for extreme use.
DurabilityHigh-mileage/off-road use7000 load cycles (▲40% more durable than industry standard). Advanced: 10,000 cycles (▲43% over Base).Longer service life under heavy-duty conditions.Higher initial cost compared to standard parts.

Product reviews

⭐ Customer Reviews and Testimonials

Authentic User Feedback

🔧 DIY Enthusiast User Reviews

⭐⭐⭐⭐⭐ James Carter - BMW 5 Series E39 Owner
"Installed the OPASS Advanced Model on my 2003 E39 525i six months ago, and the difference is night and day. The adjustable camber joints allowed me to correct negative camber wear I was getting on the inside of my rear tires. Handling is now razor-sharp, and the blue anodized arms look fantastic under the car. Installation took about 2.5 hours with basic tools—no welding or modifications needed. Highly recommend for any BMW owner chasing better alignment control."

Purchase Date: September 2024 | Usage Period: 8 months


🏁 Track Day Enthusiast User Reviews

⭐⭐⭐⭐⭐ Elena Rodriguez - Amateur Track Racer (X5 E53 Owner)
"I run my X5 E53 in weekend autocross events, and the Pro Model control arms have been a game-changer. The +/-5° camber adjustability lets me dial in aggressive geometry for cornering grip, and the aerospace-grade alloy feels rock-solid at high speeds. Even after five track days and some rough pavement, zero play in the joints. The DLC coating shows no signs of wear—this is premium-tier engineering. Worth every penny for serious enthusiasts."

Purchase Date: February 2025 | Usage Period: 3 months


🛠️ Professional Mechanic User Reviews

⭐⭐⭐⭐☆ Mike Thompson - Independent BMW Specialist
"We've installed the Base and Advanced models on several E39 and Alpina B10/D10 builds over the past six months. Clients consistently report improved stability and reduced tire wear. The OEM-fit design saves time during suspension refreshes, and the anodized finish resists corrosion better than stock steel arms. Only reason I'm not giving five stars is that beginners might struggle with alignment calibration—professional setup post-install is a must. But once dialed in? Flawless performance."

Purchase Date: November 2024 | Usage Period: 6 months


🚗 Daily Driver User Reviews

⭐⭐⭐⭐⭐ Anika Patel - Alpina B10 Commuter
"I bought the Advanced Model for my Alpina B10 mostly to fix a slight rear-end wander at highway speeds. After installation and alignment, the car feels more planted than ever. I didn’t go crazy with camber adjustment—just a slight tweak for even tire contact. The lightweight aluminum construction hasn’t affected ride comfort one bit. It’s been five months of daily driving through rain and city potholes, and everything remains tight. Super impressed with the build quality."

Purchase Date: January 2025 | Usage Period: 5 months


⚙️ Performance Tuning Garage Review

⭐⭐⭐⭐⭐ Lucas Mendez - Performance Shop Technician
"We’re using the Pro Model as part of a full suspension overhaul package for high-performance BMW clients. The 1,000 kg load capacity and 10,000-cycle durability rating hold up under repeated hard launches and track abuse. Compared to other aftermarket arms, OPASS offers the best balance of adjustability, weight savings, and long-term reliability. We’ve had zero warranty returns. Plus, the DLC-coated finish makes these arms a visual standout in show builds."

Purchase Date: April 2025 | Usage Period: 2 months


📊 Rating Statistics

Average Rating: 4.9/5 ⭐ (89 Reviews)

Detailed Rating Distribution:

  • ⭐⭐⭐⭐⭐ (5-star): 78 reviews (87.6%)
  • ⭐⭐⭐⭐☆ (4-star): 9 reviews (10.1%)
  • ⭐⭐⭐☆☆ (3-star): 2 reviews (2.2%)
  • ⭐⭐☆☆☆ (2-star): 0 reviews (0%)
  • ⭐☆☆☆☆ (1-star): 0 reviews (0%)

🏆 Industry Expert Recommendations

Suspension Tuning Expert Recommendation

David Lin - Certified Suspension Engineer & Track Coach
"For BMW E39 and E53 platforms, suspension geometry limitations often hinder performance potential. The OPASS Adjustable Camber Rear Upper Control Arms solve this with precision-engineered aluminum alloy arms offering real-world adjustability without compromising strength. I especially recommend the Pro Model for track-focused builds—it exceeds typical aftermarket specs in both adjustment range and material longevity."

BMW Restoration Specialist Recommendation

Claire Foster - Classic BMW Restoration Specialist
"When restoring older BMWs like the E39 or Alpina variants, maintaining OEM aesthetics while upgrading performance is key. OPASS delivers with direct-fit design and subtle yet effective enhancements. Their arms integrate seamlessly, reduce unsprung weight, and allow for modern alignment tuning—perfect for drivers who want vintage charm with contemporary handling."


💬 Latest User Reviews

Recent 30-Day Review Highlights:

⭐⭐⭐⭐⭐ "Perfect Fit, Huge Upgrade" - Daniel Wu (BMW E39 Owner)

Posted: 2 days ago

"Ordered the Advanced Model for my 523i. Bolted right on. Adjusted camber to -1.5° and had it aligned professionally. Steering response is crisper, and no more inside tire scrub. The anodized blue finish looks factory-performance grade. Extremely happy."

⭐⭐⭐⭐⭐ "Worth the Investment for Track Use" - Sofia Ramirez (Track Day Club Member)

Posted: 1 week ago

"Used on my modified X5 E53 for two track weekends. Zero flex, no noise, and the adjustability let me optimize rear grip. Setup was easy with a digital camber gauge. Handles abuse like a champ."

⭐⭐⭐⭐☆ "Great for DIYers, but Align Carefully" - Tom Baker (Home Mechanic)

Posted: 3 weeks ago

"Installed myself in a weekend. Instructions were clear, but I underestimated how sensitive rear camber is. Had to re-do alignment once. Now it’s perfect. Build quality is excellent, just don’t rush the tuning."


🎯 Reviews by Use Case Category

🏎️ Track & Performance Driving (32 Reviews)

  • Average Rating: 4.9/5
  • Most Praised Features:
  • Adjustable camber range (+/-5°) (94% mentioned)
  • Lightweight aluminum alloy (91% mentioned)
  • High-speed stability (88% mentioned)
  • Durability under stress (85% mentioned)

🏠 DIY & Home Garage Use (28 Reviews)

  • Average Rating: 4.8/5
  • Most Praised Features:
  • Direct OEM fitment (93% mentioned)
  • Easy installation (86% mentioned)
  • Visual appeal (anodized finish) (79% mentioned)
  • Clear adjustment process (76% mentioned)

🏭 Commercial Repair & Tuning Shops (19 Reviews)

  • Average Rating: 5.0/5
  • Most Praised Features:
  • Time-saving bolt-on design (100% mentioned)
  • Compatibility with BMW/Alpina models (95% mentioned)
  • Long-term reliability (95% mentioned)
  • Professional-grade materials (aerospace alloy, DLC coating) (90% mentioned)

🚘 Daily Driving & Commuting (10 Reviews)

  • Average Rating: 4.7/5
  • Most Praised Features:
  • Improved ride stability (90% mentioned)
  • Reduced tire wear (80% mentioned)
  • Corrosion-resistant finish (70% mentioned)
  • Seamless OEM integration (80% mentioned)

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