Frequently Asked Questions

Aurus US sells genuine OEM new and OE-quality remanufactured fuel injectors from manufacturers like Bosch, Denso, Siemens, Delphi, Keihin, and Aurus. Every injector is flow-tested and matched to your vehicle's exact OEM specification — never generic aftermarket parts.

OEM new injectors are factory-fresh from the original manufacturer. OEM remanufactured injectors are genuine OEM cores that have been disassembled, ultrasonically cleaned, fitted with new seals/o-rings/filters, flow-matched on calibrated test benches, and tested under all duty cycles. Both carry our Lifetime Warranty. Remanufactured units typically save 30-50% with no compromise on performance.

Yes. Premium-tier injectors ship with a printed Flow Test Certificate showing the exact spray pattern, flow rate (cc/min), leakage test result, and electrical resistance for each injector in your set. Other tiers can request flow data on demand at no charge.

Both. Most listings are available as a single injector OR as a matched, flow-balanced set of 4, 6, or 8. Set pricing includes a small per-unit discount and a guarantee that all injectors in the set are flow-matched within ±2% for smooth engine operation.

In our flow data, properly remanufactured OEM cores perform within ±2% of new factory specification — often exceeding the flow consistency of new aftermarket injectors. Reliability matches new while saving 30-50% in cost.

All Aurus fuel injectors come with a Lifetime Warranty against manufacturing defects. If an injector ever fails due to a defect in materials or workmanship, we'll replace it free of charge — for as long as you own the vehicle it was installed in.

30-day hassle-free returns. If your injector doesn't fit or you change your mind, contact us within 30 days of delivery for a full refund or exchange. The injector must be in resalable condition (not installed). Defective injectors covered by warranty are exchanged at any time.

Contact us immediately at support@aurus-us.com with: 1) Order number, 2) OBD-II code printout, 3) brief description of symptom. If diagnostic confirms an injector defect, we ship a replacement free under the Lifetime Warranty and provide a prepaid return label. Turnaround is typically 2-3 business days.

Yes — free standard shipping on every order within the United States (3-7 business days). Priority shipping (2-3 business days) is $12.99 and Overnight delivery is $49.99.

Orders placed before 2:00 PM Pacific Time ship the same business day. Orders placed after 2:00 PM PT, on weekends, or holidays ship the next business day. You'll receive a tracking number by email as soon as your label is printed.

Yes. Canada shipping is $59.99 (5-7 business days). International shipping is $149.99 (7-14 business days). UPS and DHL with full tracking. Customer pays applicable duties/taxes at delivery.

Every Aurus listing includes a verified fitment list with year, make, model, trim, and engine. We cross-reference with NHTSA VIN data and OEM part numbers. If you're unsure, send us your VIN or part number through the contact form and we'll confirm fitment before you order — at no charge.

Yes. All Aurus injectors meet or exceed the OEM specification for emissions performance. They are 50-state legal, including California (CARB-compliant) and other emission-controlled states. Using a properly matched injector is critical to passing smog/emission inspections.

Fuel injector replacement is an intermediate-level DIY job (3-5 hours for most engines). 1) Relieve fuel system pressure. 2) Disconnect battery. 3) Remove fuel rail bolts. 4) Lift rail with injectors. 5) Swap injectors. 6) Always install new o-rings (in the box). 7) Reseat rail and torque to OEM spec. 8) Reconnect electrical, prime fuel system, start engine. We recommend a torque wrench and matching the OEM service manual.

After replacing injectors, the ECU may need to relearn fuel trim values. Drive 30-50 miles under normal conditions and most adaptive trims will reset. If specific codes persist (P0171 lean, P0300 misfire, P0420 catalyst), the issue may be unrelated — check for vacuum leaks, MAF sensor, fuel pump pressure, or ignition coils. Email support with the OBD-II code for diagnostic help.

All major credit cards (Visa, Mastercard, American Express, Discover), Apple Pay, Google Pay, and bank transfer for B2B accounts. All payments are processed securely through Stripe with PCI-DSS compliance and 3D Secure authentication.

Yes. We work with independent repair shops, mobile mechanics, and small dealerships. B2B accounts get tiered volume discounts (5%-20%), net-30 payment terms after credit approval, prepaid shipping labels for remanufacturing customers, and dedicated account support.

Yes. Our remanufacturing service accepts your old (core) injectors for credit toward a remanufactured set. You ship them in (we provide a prepaid label after order), our team disassembles, cleans, flow-tests, and re-seals them, and ships them back to you. Turnaround is typically 5-7 business days.