
Bringing your own parts to a 4S shop is generally not accepted for replacement, and currently only some 4S shops will agree to do so. Introduction to 4S shops: A 4S shop, fully known as an automobile sales service 4S shop, is a car sales enterprise that integrates four functions: vehicle sales, spare parts, after-sales service, and information feedback. Services of 4S shops: The core competitiveness of a car 4S shop lies in winning customers with high-quality services. At a car 4S shop, consumers can access all value-added services related to car information, market trends, after-sales services, maintenance instructions, and spare parts supply. Whether it's a complete vehicle or spare parts, they are guaranteed to be original factory products, relieving consumers of any concerns regarding after-sales service, repairs, and maintenance.

I encountered the same situation last time when I brought my own purchased air filter to the dealership for replacement. The staff directly refused, citing various reasons. The main point was that they only use their own genuine parts, fearing quality issues with externally sourced components. One technician quietly told me that parts sales are actually the most profitable aspect for dealerships, and bringing your own parts significantly cuts into their earnings. However, I later found out that a newly opened dealership did agree to replace it, but charged 30% more for labor than usual. So it really depends on the dealership, and it's best to call ahead and ask. Also, be aware that if your car is still under warranty, using self-provided parts might affect the vehicle's warranty coverage.

As a seasoned driver, I must remind you that this really depends on the dealership's policy. Last year when I brought my own engine oil for maintenance, the service advisor flat-out refused. Their main concern is the unclear origin of parts - if something goes wrong, liability becomes a messy issue. Especially for core components like the engine, shops are even more hesitant. Here's a workaround though: some dealers allow you to purchase parts through their system, which ensures authenticity while saving you some money. If your car is already out of warranty, you might consider going to a trusted repair shop. Pro tip: aftermarket parts are almost impossible to install at dealerships - my friend got rejected when he tried to install his own LED headlights last time.

I specifically asked a familiar car mechanic about this. He said most 4S stores are unwilling to replace customer-provided parts, mainly due to manufacturer warranty issues. Because automakers have a traceability system for each component, external parts without warranty codes could affect the store's reputation if problems arise. Additionally, their technicians have operational guidelines, and using non-official parts may result in penalties. If you really want to save money, he suggested trying authorized repair shops as their policies are more flexible. Another method is to ask the parts seller if they provide installation services before purchasing, as some stores partnered with e-commerce platforms can directly install the parts.


