Customization:
With lightweight aluminum alloy construction, reduce vehicle weight for improved handling and fuel efficiency*.
With adjustable camber joints, fine-tune suspension geometry for optimal handling and stability*.
With an aerodynamic design, enhance high-speed stability and reduce drag by up to 15%*.
Designed for high-performance scenarios, ensure precision during aggressive driving or track use*.
Meet OEM certification standards for compatibility and durability, ensuring seamless integration with BMW/Alpina vehicles*.
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.
Feature | Specification | Application Scenario |
---|---|---|
Material | High-strength aluminum alloy | Reduces unsprung weight for improved handling |
Adjustability | Adjustable camber/caster (+/-5° range) | Customizing suspension geometry for track or daily driving |
Compatibility | BMW X5 E53, 5 Series E39 (2003), Alpina B10/D10 | Direct fitment for OEM performance tuning |
Finish | Blue anodized coating | Corrosion resistance and aerodynamic design |
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.
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.
Parameter | Base Model | Advanced Model | Pro Model |
---|---|---|---|
Material | Standard aluminum | High-grade aluminum | Aerospace-grade alloy* |
Camber Adjustment | +/-3° | +/-4° | +/-5° |
Load Capacity | 800 kg | 900 kg | 1,000 kg |
Finish | Matte black | Blue anodized | Blue anodized + DLC coating |
Technical Breakthroughs:
Version Selection Guide:
*Pro Model’s aerospace-grade alloy meets SAE AMS-QQ-A-225/8 specifications.
Category | Usage Scenarios | Characteristics | Advantages | Disadvantages |
---|---|---|---|---|
Material Quality | High-performance vehicles | Aluminum alloy (15% lighter than steel, ISO 3801) ▲ vs steel industry standard. | Reduces unsprung weight, enhancing handling and fuel efficiency. | Higher cost than steel alternatives. |
Adjustability | Track driving/uneven terrain | Adjustable joints (±5° range) ▲ vs fixed industry standard. Advanced: ±8° range (▲3° over Base). | Customizable suspension geometry for optimal performance. | Requires mechanical expertise to adjust. |
Weight | Reducing unsprung mass | 4.25kg (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. |
Compatibility | Specific 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 Level | Open-track environments/noise-sensitive | 45 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. |
Durability | High-mileage/off-road use | 7000 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. |
⭐⭐⭐⭐⭐ 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
⭐⭐⭐⭐⭐ 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
⭐⭐⭐⭐☆ 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
⭐⭐⭐⭐⭐ 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
⭐⭐⭐⭐⭐ 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
Average Rating: 4.9/5 ⭐ (89 Reviews)
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."
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."
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."
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."
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."
The Product Description is generated by third-party, and Alibaba.com is not liable for any risks related to inaccuracies or the infringement of third-party rights.
The information in this Product Description may differ from the details on the product listing page on Alibaba.com. Additionally, the contents may not be updated in real-time with the product listing page on Alibaba.com, and there may be delays in reflecting the most updated information. The description on product listing page takes precedence. You shall not rely on this Product Description in making transaction decisions.
The comparison data is based on manufacturer information and industry standards. Actual results may vary depending on individual use cases. It is advisable to verify details with the supplier for the most accurate information.