
Tested. Trusted. Delivered
Certified used engines and transmissions that deliver performance, durability, and savings — fully tested and backed by warranty.
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Start by Selecting Your Make & Model Below.

✔️Massive Inventory Across 2,500+ Yards Nationwide
Access to 2,500+ yards nationwide — we’ll find the exact engine or transmission you need.

✔️ Up to 3 Years Warranty
Every used part is backed by a real warranty ranging from 1 to 36 months.

✔️ Certified Quality
Each engine and transmission is tested and certified by experienced auto professionals.

✔️ Customer-First Service
We treat every order with care and support you before and after the sale.

✔️ Fast, Nationwide Delivery
Your part ships securely to your door — no lifting, no stress.
New Arrivals
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2007 Mercedes S Class Engine 221 Type, S600
Regular price $7,250.00 USDRegular priceUnit price / per$8,700.00 USDSale price $7,250.00 USDSale -
2002 Toyota Camry Used Transmission MT, (4 cylinder)
Regular price $1,779.00 USDRegular priceUnit price / per$2,134.80 USDSale price $1,779.00 USDSale -
2011 Chevy Truck-Silverado 1500 (1999 Up) Engine 5.3L, LPG (opt LFT)
Regular price $2,438.00 USDRegular priceUnit price / per$2,925.60 USDSale price $2,438.00 USDSale -
2000 Volkswagen Passat Used Transmission MT, 1.8L (turbo gas), transmission ID EZG
Regular price $691.00 USDRegular priceUnit price / per$829.20 USDSale price $691.00 USDSale
"We care for your car like our own family rides in it."
Let's bring your vehicle back on the road with full power.
Blog posts
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🔧 APS Preinstallation Guide: How to Properly In...
At AutoPowerSource, we want your replacement engine to run smoothly and last for years. That’s why we’ve created this simple but essential Used Engine Preinstallation Guide — to help you...
🔧 APS Preinstallation Guide: How to Properly In...
At AutoPowerSource, we want your replacement engine to run smoothly and last for years. That’s why we’ve created this simple but essential Used Engine Preinstallation Guide — to help you...
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🔧 How to Maintain a Used Engine After Installat...
Follow this essential guide to keep your used engine running like new. Backed by Auto Power Source’s step-by-step checklist, this post helps you avoid costly mistakes and maximize engine life.
🔧 How to Maintain a Used Engine After Installat...
Follow this essential guide to keep your used engine running like new. Backed by Auto Power Source’s step-by-step checklist, this post helps you avoid costly mistakes and maximize engine life.
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🛠️ 5 Things to Know Before Buying a Used Engine...
If your vehicle needs a replacement engine or transmission, buying a used one can save you thousands of dollars — without sacrificing performance or reliability. But before you place your...
🛠️ 5 Things to Know Before Buying a Used Engine...
If your vehicle needs a replacement engine or transmission, buying a used one can save you thousands of dollars — without sacrificing performance or reliability. But before you place your...
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FAQ's
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Q: How can I be sure the engine or transmission I’m purchasing will meet my expectations?
A: Every engine and transmission we sell is thoroughly tested by certified mechanics with years of experience. Once inspected, cleaned, and secured on a pallet, we send you detailed photos for your approval. You’re fully in control: if you're not satisfied, you can deny approval and receive a 100% refund—no questions asked.
Plus, you’re backed by a 7-day return policy and up to a 36-month warranty, giving you complete peace of mind. We invest heavily in preparation and shipping, so we don’t send out anything we wouldn’t trust ourselves. Your satisfaction and protection are our top priority.
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Q: What payment methods do you accept?
A: We accept a wide range of secure and convenient payment options, including:
- Credit & Debit Cards
- PayPal, Venmo, Apple Pay, Google Pay, ZellePay
- Wire Transfers & ACH Payments
- Financing through ShopPay
Whether you prefer paying upfront or need flexible financing, we've got you covered.
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Q: How long does shipping take and how is the engine packaged?
A: Our standard shipping process takes 3–5 business days, which includes dismantling, pressure washing, and secure packaging using bubble wrap and a pallet. We ship exclusively through reputable carriers like R&L, FedEx, and UPS to ensure safe, on-time delivery.
As soon as your part ships, you’ll receive a tracking number so you can monitor the delivery every step of the way. While delays are rare, we’ll keep you informed in case of any unforeseen circumstances. Rest assured, your engine is handled with care from our door to yours.