With the surging demand for personalized car modifications, inner mudguards have become a key accessory for car owners to protect the vehicle body and enhance the driving experience. However, in the face of the dazzling array of products on the market, problems such as material differences, compatibility traps, and false labeling of durability frequently occur. This article, combining industry trends and user test data, provides consumers with an authoritative purchasing guide from three dimensions: material science, compatibility logic, and durability verification.

I. Material Selection: The Performance Competition among Rubber, Plastic and Composite Materials
1. Rubber material: A balance between aging resistance and elasticity
Rubber-lined mudguards are mainly made of natural rubber or synthetic rubber. Their core advantages lie in weather resistance and impact resistance. For instance, the dedicated mudguards for the Yaodi Tank 300 are made of engineering rubber composite material, which remains flexible in extremely cold environments as low as minus 30 degrees Celsius and effectively resids the impact of gravel on off-road conditions. Measured data shows that after driving 5,000 kilometers on muddy roads, the surface wear rate of the rubber lining is less than 0.3mm, which is far superior to that of ordinary plastic materials.

Applicable scenarios: Off-road vehicles, vehicles in rainy areas and those exposed to high temperatures for a long time.

2. Engineering plastics: Advantages of lightweight and cost
Engineering plastic linings represented by TPE and PP have occupied the economic market due to their lightweight and easy-to-mold properties. The special TPE mudguard for Tesla Model Y achieves a precision bonding of 0.2mm through injection molding process. The weight of a single piece is 40% lower than that of the rubber type, and the fuel economy is significantly improved. However, the hardness deficiency of plastic materials is exposed significantly under extreme road conditions: A third-party test showed that the PP material lining had a 12% crack rate in a gravel impact test at a speed of 80km/h.

Applicable scenarios: Urban commuting vehicles, users with limited budgets.

3. Composite materials: A compromise between performance and cost
Composite materials such as ABS and PC+ABS are processed through multi-layer co-extrusion technology, achieving a balance between strength and toughness. The omonalisa Lexus RX mudguard is made through an ABS one-piece molding process. In the corrosion resistance test, after a 48-hour salt spray test, there is no corrosion on the surface, and its service life is three times longer than that of pure plastic materials. However, the cost of composite materials is 35% higher than that of plastic ones, and they are more commonly seen in the mid-to-high-end vehicle modification market.

Ii. Compatibility Verification: The core logic of the original factory's hole position and arc design
1. Original factory hole position matching: A precision revolution for installation without drilling
The inner lining mudguards of the Samit Rav4 / Vilanda have achieved 100% matching of the original vehicle's screw holes through 3D scanning technology. The installation time has been shortened from 2 hours in the traditional solution to 15 minutes. Actual measurement data from a certain modification store shows that after driving 2,000 kilometers, the non-original factory hole mudguards have a loosening rate of 23%, while the loosening rate of the original factory hole products is less than 2%.

Pitfall Avoidance Guide: Prioritize products marked with "No need for drilling" or "original vehicle curvature", and reject universal "all-purpose mudguards".

2. Vehicle Model Year Compatibility: The Importance of Data Update
Take the Jetta VS5 as an example. The difference in wheel arch curvature between the 2019 and 2022 models is as much as 8mm. If the mudguards without updated data are used, it will cause the edges to lift, and the mud and water infiltration rate will increase by 40%. Regular brands such as Yaodi and Samit update their vehicle model databases every quarter to ensure the accuracy of adaptation.

Verification method: Require the merchant to provide compatibility proof for specific years, or check compatibility through the vehicle identification number (VIN).

3. Package combination Strategy: Optimization of functionality and cost
Tesla Model Y users can choose either the "Four-wheel mudguard + lining" six-piece set or the "Front wheel lining + pedal pattern" four-piece set according to their needs. Actual measurements show that when the six-piece set is driven in rainy weather, the coverage rate of mud spots on the vehicle body drops from 68% of the single-piece set to 12%, but the cost increases by 55%. It is recommended to select based on the usage scenario:

Urban commuting: Front wheel lining + rear wheel mudguard four-piece set
Off-road requirements: Full vehicle six-piece set + thickened inner lining
Iii. Durability Verification: Dual Considerations of laboratory Data and User Measurements
1. Laboratory testing: Standardized performance benchmarks
Regular brand products need to pass the ISO 16949 automotive industry quality system certification. The core tests include:

Weather resistance: The xenon lamp aging test simulates 5 years of outdoor exposure, with a color difference ΔE≤3
Impact resistance: No cracks when impacted by 5J energy crushed stone
Chemical resistance: No deformation after soaking in gasoline and engine oil for 72 hours
For instance, during the temperature variation cycle test of -40℃ to 80℃, the dimensional change rate of the original factory mudguard of Litian Tiguan L was ≤0.5%, far exceeding the industry standard.

2. User Testing: Real feedback from long-term use
A survey conducted by a certain automotive forum among 5,000 users shows that:

Rubber lining: The integrity rate is 89% after 3 years of use, and the main fault is edge aging
Plastic lining: After 2 years of use, the integrity rate is 67%, and cracks are mostly found at the turning points of wheel arches
Composite material: The integrity rate is 82% after 4 years of use, but the cost is 2.3 times that of the plastic type
Suggestion: Give priority to choosing brands that offer A warranty of more than 2 years. For example, Baizhidan Geometry A PRO mudguards provide a "natural damage return and exchange" service.

Iv. Industry Trends: The Future Directions of Intelligence and Customization
With the development of automotive electrification and intelligence, inner mudguards are evolving from a single protective function to an integrated one. For instance, a certain brand is developing intelligent mudguards equipped with pressure sensors, which can monitor the amount of sediment accumulation in real time and issue early warnings through the on-board system. In addition, 3D printing technology has reduced the cost of customization by 70%, and car owners can upload their vehicle model data to generate exclusive inner linings.

Purchase suggestions

Clarify the usage scenarios (urban/off-road/extreme weather)
Verify material certification (ISO/SGS report)
Give priority to choosing products with original factory hole position design
Pay attention to long-term warranty and user word-of-mouth
Today, as automotive culture becomes increasingly mature, the inner lining of mudguards is no longer merely a protective component; it also reflects the owner's attitude of caring for their vehicle. By making scientific choices, every trip can be both safe and stylish.