39
verified 2003 mercedes engines
2003 Used Mercedes Engines For Sale
39 verified 2003 Mercedes engines in stock across eight model lines — the 203 Type C Class (C230, C240, C320), the 220 Type S Class and 230 Type SL, the CLK in both of its 2003 chassis (209 Type Coupe, 208 Type Convertible), the 215 Type CL, the 163 Type ML, the 170 Type SLK, and the 463 Type G. Every unit is VIN-matched to your vehicle, compression-tested by ASE-certified technicians, photographed before shipment, and backed by up to a 3-year warranty plus 30-day money-back. Free freight nationwide.
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Compression-Tested & Verified
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Free Nationwide Shipping
Browse 2003 Mercedes by Model
Match your 2003 Mercedes engine by vehicle. Use the cards below to identify the right chassis Type code — in 2003 the Type matters more than the badge, and every unit is then VIN-matched at the order step.
2003 C Class
203 Type. C230 (Sdn/Cpe), C240 (Sdn/SW, RWD/AWD) and C320 (Sdn/Cpe/SW, RWD/AWD). Our largest 2003 group at twelve units — body style and drivetrain both change the accessories.
2003 S Class
220 Type S430/S500/S55/S600 and 230 Type SL500/SL55 are both catalogued under this line. Trust the Type code, not the badge.
2003 Sl Class
Carries the identical six-unit set as the S Class line (220 Type S-badged plus 230 Type SL-badged). The Type code is the honest key here, not the model name.
2003 Clk
The split year: 209 Type Coupe (CLK320, CLK500, CLK55) alongside the carry-over 208 Type Convertible (CLK320, CLK430). Two chassis, one badge — the Type decides fit.
2003 Ml Series
163 Type. ML320, ML350, ML500 and the ML55 AMG. 2003 is the ML320-to-ML350 changeover, so both are in stock.
2003 Cl Class
215 Type. CL500, CL55 and CL600 — three distinct engines under one roof.
2003 Slk
170 Type. SLK230 and SLK320. The 170 has one season left; the 171 arrives for 2005 and does not interchange.
2003 G Class
463 Type. A single G500 — the naturally-aspirated G-Wagen V8, compression-tested and palletized.
Why Buy a 2003 Mercedes Engine from Auto Power Source
Every 2003 Mercedes engine we list is donor-pulled from a low-mileage vehicle, cataloged against its chassis Type code and VIN, and held in our climate-controlled warehouse pending sale. Each unit clears the same six-step inspection — VIN-matching, ASE testing, noise & smoke verification, full visual inspection, multi-angle photography, and palletized shipping.
Our ASE-certified technicians compression-test every cylinder and run a leak-down evaluation before a 2003 Mercedes engine is cleared for sale. You pay a fraction of dealer-new pricing for identical Mercedes engineering, ship free on a heavy-duty pallet anywhere in the continental U.S., and get up to a 3-year warranty plus 30-day money-back. 2003 is the year the CLK straddles two chassis and the ML swaps its 320 for a 350, so the Type code beats the badge every time. Text your VIN and we will confirm the match.
📱 Fastest way to match: text us your VIN, get options in minutes.Text Your VIN →
Your 2003 Mercedes Engine Options: Compared
Most 2003 Mercedes owners face four real choices when their engine fails:
← Swipe sideways to see all columns →
| Option |
Cost |
Reliability |
Warranty |
Fitment Match |
| Used OEM (this collection) |
$$$ Best Value |
High |
Up to 3 years |
VIN-matched |
| New OEM (dealer) |
$$$$$ 2-4× more |
High |
Manufacturer |
Exact |
| Aftermarket / Reman |
$$$$ |
Varies |
6-12 mo |
May adapt |
| Junkyard |
$ Cheapest |
Unknown |
None |
DIY |
Tested used OEM hits the sweet spot — same Mercedes engineering as new, fraction of the cost.
2003 Mercedes Engine Buying Guide
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Read the chassis Type code first. 2003 Mercedes engines are catalogued by Type — 203, 208, 209, 215, 220, 230, 163, 170, 463 — and the Type, not the model name, is what determines fit.
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The CLK is split across two chassis this year. The 209 Type Coupe (CLK320, CLK500, CLK55) and the 208 Type Convertible (CLK320, CLK430) both sell as 2003 CLKs. A 208 unit will not serve a 209 car, and the badge alone will not tell you which you have.
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Mind the ML320-to-ML350 changeover. The 163 Type ML runs ML320, ML350, ML500 and ML55 in 2003. The 320 and 350 are different engines from the same season — do not assume displacement from the model year.
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Match body style and drivetrain on the C Class. The 203 Type C240 and C320 ship as Sedan, Coupe and Wagon, in RWD and AWD. The engine is common within a badge, but mounts, brackets and accessories follow the body and drivetrain.
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Treat AMG units as distinct. The 55 badge (CLK55, ML55, S55, SL55, CL55) is a separate engine from the base V6 and V8 and never interchanges with it. Always run the donor VIN; we provide it on request.
Our ASE-certified technicians verify every one of these points against your VIN before any engine ships.
Frequently Asked Questions
What is the warranty on a 2003 Mercedes engine?
Up to 3 years, depending on the specific unit. The exact warranty term is listed on each product page.
What does compression-tested mean?
ASE-certified technicians compression-test every cylinder and run a leak-down evaluation before any 2003 Mercedes engine is cleared for sale.
How long until delivery?
Prep and ship time is 3-5 business days. Transit time is 2-3 business days via freight carrier after dispatch.
Can I see photos before I buy?
Yes. Multi-angle photos of the actual unit are sent for your approval before payment.
Do I need my VIN?
Strongly recommended. 2003 Mercedes engines split by chassis Type code (203, 208, 209, 215, 220, 230, 163, 170, 463), by badge, and by body style and drivetrain on the C Class. The CLK alone spans two Types this year. The VIN settles all of it.
What if I do not approve the photos?
Every dollar back — no restocking fees, no return freight charges.
Why is this cheaper than the dealer?
These are inventory-verified OEM units pulled from low-mileage donor vehicles, not new-manufacture parts. Same Mercedes engineering, a fraction of dealer-new pricing.
When can I reach customer service?
24h Monday through Saturday on 1-877-313-8995, or text your VIN any time and we reply with matched options.
46,000+
engines + transmissions shipped
0%
fitment-related returns
All 50
states covered, free freight
Excellent
Customer Reviews
rated on Trustpilot
Our 6-Step Inspection & Shipping Process
Every 2003 Mercedes engine we ship has been through these six steps:
1. VIN-MatchingWe match the donor VIN to your VIN to confirm engine code, emissions calibration, and drivetrain fit.
2. Tested & VerifiedASE-certified technicians compression-test every cylinder and run a leak-down evaluation on each engine.
3. Noise & Smoke VerificationUnits are run to verify normal mechanical sound and clean operation — catches wear static tests miss.
4. Visual InspectionEvery accessible component is inspected: turbos, manifolds, valve covers, accessories, sensor harnesses.
5. Photograph & CatalogMulti-angle photos sent to you BEFORE we ship, for your approval.
6. Palletize & ShipStrapped on a heavy-duty wooden pallet, shipped via freight at no charge.
What Our Customers Say
Rated Excellent by our customers on Trustpilot.
★★★★★
Transaction was perfect
"Found me the right engine at a great price. Got it in 2 days and installed the car the next day. Runs absolutely beautiful."
— Kevin Graham, 2026-04-29
★★★★★
Repeat customer
"AutoPowerSource is a great company. I've used them several times for used motors. Low mileage when other companies gave up."
— Curtis Haines, 2025-12-23
★★★★★
Highly recommend Mike
"Mike reached out first thing in the morning regarding my inquiry for a used engine. Very informative and helpful."
— Beatrice, 2026-03-31
★★★★★
Great experience
"Daisy kept me in the loop every step. My original engine was damaged before shipping; she found a different one quickly."
— Bryan Perkins, 2026-03-25
Our Photos-Before-Shipment Guarantee
Before any 2003 Mercedes engine leaves our warehouse, we send you multi-angle photographs. You approve. If you do not approve, you get every dollar back — no questions, no restocking fees, no return freight charges. On top of 30-day money-back and up to a 3-year warranty.
✉ Email Us at info@autopowersource.com
