How to Check Engine Details

You can check engine details by locating the VIN and the engine number, reading the under‑hood emissions/service labels, scanning the ECU with an OBD‑II tool (Mode 9), and verifying specifications in the owner’s manual and official manufacturer databases; for motorcycles and small engines, look for the stamped engine number on the crankcase and use the maker’s model/serial lookup. This guide explains what “engine details” means, where to find them on different machines, how to verify them online or with tools, and what to watch for when buying parts or a used vehicle.

What counts as “engine details”

Before you start, clarify which facts you need. “Engine details” can mean identity, specifications, or compliance information. Here are the most common items people look up and why they matter.

• Engine code/designation (e.g., Toyota 2AR‑FE, VW CCTA, Honda K24Z7): parts compatibility and technical info
• Engine serial/number stamped on the block or crankcase: identity matching, theft checks, rebuild history
• Displacement and configuration (e.g., 2.0L I4, 3.0L V6), induction (NA/turbo/supercharged), fuel type
• Power/torque ratings and compression ratio
• Emissions family/certification (EPA/CARB/Euro) listed on the under‑hood label
• Recommended oil grade/spec (e.g., 0W‑20, ACEA/API spec), service intervals
• Timing method (belt vs. chain), ignition type (coil‑on‑plug/distributor)
• ECU calibration ID and checksum (CAL ID/CVN via OBD‑II Mode 9) for software version/tune checks

Knowing which of these you need will determine whether you should decode the VIN, examine the engine itself, or query the ECU.

Quick ways to identify your engine

Use this quick sequence to pin down engine identity and specs with minimal tools.

1. Check the owner’s manual and under‑hood labels: Many manuals list engine variants; the emissions label under the hood typically states displacement and the engine/emissions family.
2. Decode the VIN: On many North American models, the 8th VIN character indicates engine type; use an official VIN decoder to confirm the exact engine fitted.
3. Find the engine number stamping: Look for a stamped alphanumeric code on the block or head; note its location varies by make/model.
4. Scan the ECU with an OBD‑II tool: Read Mode 9 for VIN, CAL ID, and CVN to verify software and sometimes engine variant.
5. Review registration/service records: Titles, V5C (UK), and dealer service invoices often list engine code or number.
6. Call a dealer with your VIN: Dealers can retrieve the build sheet and engine code from manufacturer systems.
7. For motorcycles/small engines: Read the engine number on the crankcase and use the maker’s serial lookup or parts fiche.

These steps typically resolve most identification questions; if details conflict, prioritize physical stampings and official OEM data.

Where to find numbers and labels

Vehicle VIN locations

The VIN uniquely identifies the vehicle and often encodes engine info. Here’s where to find it.

• Base of windshield on the driver’s side (visible from outside)
• Driver’s door jamb certification label
• On registration/title, insurance card, and many service records
• Stored in the ECU and readable via OBD‑II Mode 9

Record the VIN exactly; a single character error can return the wrong engine specification.

Engine number and engine code locations

The engine number is stamped on the engine; the engine code may be stamped or printed on a plate or label. Typical locations include:

• Front or side of the engine block near the head‑to‑block mating surface
• Near the timing cover, starter motor, or gearbox bellhousing flange
• On the valve/rocker cover or an attached metal tag/plate
• On turbo/intake manifolds (some VW/Audi/Volvo codes) or top of the head (Honda/older Toyota)

Use a flashlight and degreaser if needed; stampings can be faint under grime or paint.

Under‑hood emissions/service label (U.S./Canada)

Modern vehicles have a required label stating emissions data and often engine family and displacement.

• Look on the underside of the hood, radiator support, or strut tower
• Label shows “Engine Family” (e.g., FFMXV02.0VEM), “Displ.” in liters, and emissions standard (e.g., ULEV, SULEV)

This label is authoritative for emissions and displacement and is useful for parts and compliance checks.

Manufacturer option/feature codes

Some makers include option codes that identify the exact engine variant.

• GM RPO codes: Historically in the glovebox; recent models use a QR/RPO label on the driver’s door jamb
• VW/Audi PR code sticker: In the trunk/spare wheel well or service booklet; includes the three‑letter engine code (e.g., CCTA, CXCA)
• BMW/Mini build sheet: Accessible to dealers; third‑party VIN decoders can mirror key data

These codes can pinpoint sub‑variants that affect parts like sensors, belts, or injectors.

Motorcycles and small engines

Bikes and small equipment rely on frame/engine numbers rather than automotive VIN decoding.

• Motorcycles: Engine number on crankcase; frame VIN on headstock; match both to registration and parts fiche
• Small engines: Briggs & Stratton uses “Model–Type–Code” stamped on the blower housing; Honda GX series have a serial sticker/etch on the crankcase

Use the exact stamped model/serial when ordering parts; model families often have incompatible sub‑variants.

Use online tools and databases

Official and reputable databases help decode VINs and match parts. Use these sources to avoid guesswork.

• NHTSA VIN Decoder (U.S.): vpic.nhtsa.dot.gov/decoder — decodes make/model/engine info where provided
• Manufacturer parts catalogs: Many OEMs offer online EPCs or dealer‑run portals that show engine codes by VIN
• Dealer service portals: A dealer can pull the factory build sheet with engine code and production splits
• National vehicle info: UK MOT history (gov.uk/check-mot-history) shows specs; similar services exist in AU (service.transport.nsw.gov.au, NEVDIS via PPSR) and EU member states
• OBD calibration reference: Some OEMs and TSBs reference CAL ID; compare your Mode 9 CAL ID to confirm you have the latest ECU flash

Prefer official sources over ad‑heavy third‑party “decoders”; they’re more accurate and privacy‑respecting.

Step‑by‑step: Verifying engine details with an OBD‑II tool

Most 2001+ petrol and 2004+ diesel cars (varies by region) support OBD‑II Mode 9 for identity information. Here’s how to use it.

1. Plug in a compatible OBD‑II adapter (ELM327‑compatible or OEM tool) and open a trusted app (e.g., Car Scanner ELM OBD2, OBDFusion, Torque Pro).
2. With ignition ON, connect and read Mode 9 PIDs: 02 (VIN), 04 (Calibration ID), and 06 (Calibration Verification Number).
3. Confirm the VIN matches the vehicle and note the CAL ID; check with the dealer or TSBs for the latest calibration if needed.
4. Save a report; this is useful when buying a used car to detect mismatches or tunes.

If Mode 9 is unavailable or incomplete, the vehicle may be older or use a non‑standard protocol; fall back to physical labels and VIN decoding.

Region‑specific tips

Documentation and label practices vary by market. These pointers can save time.

• UK: The V5C logbook lists engine size and sometimes engine number; use DVLA to update after engine swaps
• EU: Certificate of Conformity (CoC) details engine variant and emissions standard
• U.S./Canada: Title/registration may list engine displacement; under‑hood emissions label is key for compliance
• Australia/NZ: Rego papers and PPSR checks can confirm displacement and theft status
• India: RC book/card includes engine number; verify it matches the stamping

Always ensure registration documents match physical numbers on the vehicle to avoid legal issues.

Hybrids and EVs

While EVs lack a combustion “engine,” you can still check drive unit and battery details similarly.

• VIN decoding reveals motor count, drive (FWD/RWD/AWD), and power rating on many models
• Drive unit tags: Metal labels on the motor/gearbox assembly list model codes and ratios
• Battery info: Safety labels and service menus show pack type and nominal capacity; dealer tools display part numbers

For plug‑in hybrids, you’ll have both engine and motor details; consult both the emissions label and high‑voltage component tags.

Ordering parts and ensuring compatibility

When buying parts, the engine code and production split dates matter more than model year. Follow this checklist.

1. Capture VIN, engine code, and engine serial/number from the vehicle
2. Check production date (door jamb label) for mid‑year changes
3. Use the OEM parts catalog to select by VIN/engine code; avoid generic listings that lump multiple engines together
4. For GM, use RPO; for VW/Audi, match the three‑letter engine code and PR codes; for Toyota/Honda, match full engine code suffix
5. Confirm sensor/connector shapes and supersessions (ECU, injectors, belts) before purchase

This approach minimizes returns and ensures the part fits your exact engine variant.

Red flags and legal notes

When numbers don’t match, proceed carefully. These are common warning signs.

• Mismatched VIN on dash vs. ECU vs. paperwork
• Engine number pad looks ground down, restamped, or painted over
• Emissions label missing or clearly non‑original
• Engine swaps without documentation; may violate emissions laws in your region
• Online sellers refusing to provide engine code/serial for parts matching

If you suspect tampering or theft, walk away or have the vehicle inspected by authorities or a trusted dealer.

Tools and apps that help

These tools make the process faster and more accurate.

• OBD‑II adapter (Bluetooth/Wi‑Fi): Choose reputable brands to avoid connection issues
• Apps: Car Scanner ELM OBD2, OBDFusion, Torque Pro for Mode 9 identity and live data
• Camera/flashlight and degreaser: To reveal faint engine stampings
• OEM service information access: Short‑term subscriptions provide definitive diagrams and locations

Investing in a basic adapter and app pays for itself quickly if you maintain or shop for used vehicles.

Summary

To check engine details, combine physical evidence (engine number stamping, under‑hood labels), digital checks (VIN decoding and OBD‑II Mode 9), and official records (owner’s manual, registration, OEM databases). Verify that all sources agree before ordering parts or finalizing a purchase, and be mindful of regional rules on engine numbering and emissions. For motorcycles and small engines, rely on the crankcase stamp and the manufacturer’s model/serial lookup. When in doubt, a dealer can confirm the exact engine variant from your VIN and build data.

How do I check my vehicle engine?

To find the size of your engine, you will need to check the manufacturer’s website or use a reliable VIN decoding tool like the one offered by GoodCar. Focus on the eighth character of the VIN, scanning from left to right. This character will give you the exact engine size and type that is in your vehicle.

How do I find my engine details?

You should find more specific information about your car engine in your owner’s manual, or you can call the manufacturer with your VIN (Vehicle Identification Number) and they will be able to give you more exact information about your engine.

Is a VIN lookup free?

While VINCheck is a useful free tool, it is not a comprehensive vehicle history report and should not be relied upon when purchasing a vehicle.

Can I lookup my vehicle specs by VIN number?

Yes, you can look up your vehicle specifications using your VIN number with a VIN decoder tool. These tools provide information such as the year, make, model, trim, engine type, drivetrain, and installed options for your vehicle. You can find VIN decoders on auto parts store websites, manufacturer sites, and government portals like the National Highway Traffic Safety Administration (NHTSA). 
How to find your VIN and use a decoder

1. Locate your VIN: Your 17-digit VIN can be found on a metal plate on the dashboard visible through the windshield on the driver’s side, or on a label in the driver-side doorjamb. 
2. Choose a VIN decoder: You can use a free VIN decoder, such as those offered by AutoZone.com, Mopar, or the NHTSA. 
3. Enter your VIN: Go to the website of your chosen decoder and enter the 17-character VIN into the provided field. 
4. View your specifications: The decoder will then provide a breakdown of your vehicle’s details, including its factory specifications and options. 

What information can you get? 

• General Vehicle Details: Year, make, model, and trim level.
• Engine & Drivetrain: Engine size, type, transmission, and drivetrain configuration.
• Manufacturing Details: Country of origin and assembly plant.
• Installed Options: Factory options, packages, and special features.
• Safety Features: Recalls and other safety-related information.