Interior parts, factory-original matching wheels, factory body kits and non-destructive electronic upgrades do not require filing for record. Widebody kits, large rear wings, ultra-loud exhaust systems and modified vehicle ride height are illegal modifications that will fail annual inspections. If major exterior alterations are needed, complete vehicle appearance modification filing procedures in advance. Our shop prioritizes compliant upgrade kits and does not sell illegal auto modification

Most exterior and electronic accessories differ between facelift and pre-facelift model years. Even for the same model such as BMW X3 or Mercedes-Benz C-Class, bumpers, headlights and infotainment units of old and new generations cannot be directly fitted. You need to provide your vehicle VIN code when placing an order; our customer service will accurately match the correct parts to avoid wrong purchases and rework. Porsche models are categorized as Cayenne, Macan and 718, and parts from differe

It is mandatory to verify the vehicle’s original ET offset, PCD bolt pattern and center bore; do not blindly upsize wheels. Pair widened wheels with matching low-profile tires, and complete dynamic balancing and four-wheel alignment after installation. Wheels exceeding factory specifications cannot pass vehicle annual inspection. Our store supplies compliant forged wheels of original factory stock size, balancing aesthetics and road legality, compatible with all SUVs and sedans of BMW, Mercedes-

Warranty does not cover damage caused by accidental collision or improper modification. For non-artificial faults of parts, replacements are available with order and installation records. Warranty terms for wearing parts including wheels, brakes and exhaust systems are marked separately. Products can be sent back for inspection nationwide, and round-trip shipping fees shall be borne according to liability attribution.

Orders placed at offline physical stores include professional installation service; online orders only supply parts without labor fees. For out-of-town customers, we provide access to our nationwide network of specialized German car repair shops, along with model-specific installation drawings and programming guides. We offer standardized construction procedures for all parts fitting BMW M, Mercedes-AMG, Audi RS and full Porsche lineup. Remote technical support is available to assist local shops

Only the modified parts will lose the original full vehicle warranty, and the rest factory components remain unaffected. Electrical parts upgraded via factory protocols with plug-and-play, wire-intact installation will almost never result in warranty denial by official 4S stores. If you cut the vehicle body without authorization, rewire circuits arbitrarily or install low-quality power tuning software, 4S dealers have the right to refuse warranty service for the related assemblies once malfuncti