Engine Identification

2004 Acura 3.5RLSECTION Engine Identification
NOTE: For repair procedures not covered in this article, see ENGINE OVERHAUL PROCEDURES article in GENERAL INFORMATION.

Engine identification code is stamped on block, below cylinder head mating surface. First 5 characters of code indicate engine type. See ENGINE IDENTIFICATION CODESΒ  table. Sixth and seventh digits identify emissions group. Last 5 digits represent engine serial number.

ENGINE IDENTIFICATION CODES

Application Code
3.5L C35A1
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.