📋 Quick Facts
Allowed
About 60-70% of shops
Labor markup
10-25% higher
Parts savings
20-40%
Warranty
Labor only, not part
Most independent shops and many mobile mechanics will install parts you supply, but they typically charge a slightly higher labor rate (10-25 percent) and only warranty the labor, not the part. For expensive parts (alternators, starters, A/C compressors), the savings can be $100-$300.
⚠ Brake parts and tires: maybe do notFor safety-critical parts (brake pads, rotors, tires, suspension), the marginal savings versus the warranty loss is not worth it. Let the shop supply these.
📝 Step-by-Step Guide
- Call aheadAlways ask before showing up. Some shops have a strict "we supply the parts" policy. Most independents and mobile mechanics will install customer-supplied parts on request.
- Expect a higher labor rateMost shops add 10-25 percent to their labor rate or refuse to discount it. They make their margin on parts markup, so they recover it on labor.
- Understand the warranty trade-offThe shop typically warranties only the labor (12 months / 12,000 miles), not the part. If a customer-supplied part fails, you eat the cost of the new part plus another round of labor.
- Buy quality parts onlyStick to OEM or premium aftermarket (Bosch, Denso, ACDelco, Akebono, Wagner). Cheap eBay parts are a false economy.
- Order from reputable suppliersRockAuto, FCP Euro, Amazon (verified seller), or the dealer parts counter (OEM at retail). Avoid no-name eBay or AliExpress for safety-critical parts.
- Get the right part the first timeDecode your VIN (vin.html on the AmpAuto site) to confirm the exact part number. A wrong part means a wasted trip and a re-stocking fee on the return.
💡 Best parts to BYOAlternator, starter, A/C compressor, oil filter, air filter, cabin filter, spark plugs, ignition coils, wiper blades, headlight bulbs, battery. High-markup, low-risk parts.
🔗 Related Guides
❓ Frequently Asked Questions
Will any shop install customer-supplied parts?
About 60-70 percent of independents and most mobile mechanics will. Chain shops (Firestone, Midas) and dealerships usually will not. Ask before booking.
How much do I save by bringing my own parts?
20-40 percent on parts cost typically. On an alternator (typical shop price $350, RockAuto price $180), that is $170 savings on parts. Subtract the labor surcharge to get the net.
Will the shop still warranty the work?
Labor, yes (12 months / 12,000 miles). The part, no, that warranty comes from the parts seller. If the part fails, you eat the new part cost plus another round of labor.
What parts should I NOT bring?
Safety-critical parts (brake pads, rotors, tires, suspension), parts with a core charge (alternators, starters with cores), and brand-specific electronic modules. Let the shop supply these.
Where do I buy quality auto parts online?
RockAuto for broad selection, FCP Euro for European cars with lifetime warranty, dealer parts counter for OEM, Amazon (verified seller) for filters and accessories.
Will a dealership install customer-supplied parts?
Almost never. Dealerships make significant margin on parts and most will not install outside parts. Independent shops are your best bet for BYO parts.