1959 Porsche 356A Part Numbers: A Complete Guide to Identification and Cross-Referencing

Restoring a 1959 Porsche 356A to original condition requires sourcing the correct parts. Porsche assigned specific part numbers to every component, from engine bolts to dashboard knobs. Understanding these numbers helps ensure authenticity and proper fit. This guide explains the part number system for the 1959 356A, where to find numbers on the car, how to interpret them, and how to verify you have the right part.

Understanding the 1959 Porsche 356A Part Number System

Porsche part numbers for the 356A (T2) generally follow a pattern of a six-digit main number, often preceded by a prefix that indicates the model or group. For the 1959 356A, the most common prefix is 644, which designates the 356A T2 chassis and its related components. However, some parts use other prefixes such as 616 for the engine (Type 616/1) or 741 for certain electrical items. The full part number may also include a suffix (e.g., -01, -02) indicating a revision or specific variant.

Structure of a Typical Part Number

A typical part number looks like 644.123.456.00. The first three digits (644) identify the model series. The next three (123) indicate the functional group (e.g., engine, transmission, body). The final three (456) specify the individual part within that group. The last two digits (.00) are the version or finish code. For example, 644.101.012.00 might be a specific body panel.

It is important to remember that Porsche updated part numbers over the years. A part number that supersedes an earlier one may still be correct for a 1959 car, but it must match the original design. Always check for supersession notes in official catalogs.

Where to Find Part Numbers on the 1959 356A

Part numbers are stamped or marked on many original components. Common locations include:

• Engine block: The engine number is stamped on the generator pedestal, but the true part number for the engine assembly itself is found in factory literature. Individual engine components like cylinder heads and pistons have their own casting numbers.
• Transmission: The transmission type and serial number are stamped on the side of the case near the shift rod. The part number for the gearbox as an assembly is 644.300.000.XX.
• Brake components: Calipers and master cylinders have casting numbers that correspond to part numbers.
• Body panels: Many panels have a factory stamping on the inner side, often near a flange or hidden behind trim.
• Glass: Original glass is marked with a manufacturer logo (e.g., Sigla) and a date code, but the part number is listed in the parts catalog.
• Interior: Seat frames, door panels, and dashboard pieces often have a paper sticker or ink stamp with the part number.

When inspecting a part, clean the area gently. Numbers may be faint. Use good lighting and a magnifying glass if needed.

Decoding Engine and Transmission Part Numbers

Engine Numbers

The 1959 356A was offered with several engine options: the 1600 Normal (60 hp) and 1600 Super (75 hp). Both are Type 616/1 engines. The engine serial number (not the part number) is stamped on the generator pedestal and follows a sequence like 6140001. The part number for the complete engine assembly is 616.100.000.XX. Key engine components and their typical part numbers include:

• Cylinder heads: 616.104.101.00 (right) and 616.104.102.00 (left) for Super.
• Crankshaft: 616.102.101.00.
• Pistons and cylinders: available in sets with specific part numbers for Normal or Super.

Transmission Numbers

The 1959 356A uses the Type 644 four-speed manual transmission. The gearbox part number is 644.300.000.XX. The serial number is stamped on the passenger side of the case. Within the transmission, individual gears and shafts have their own part numbers. For example, the main drive gear might be 644.302.101.00.

Identifying Body and Interior Part Numbers

Body parts for the 1959 356A are often stamped with a number like 644.501.101.00 for a front fender. Many reproduction parts are available, but original part numbers should be verified against factory documentation. Interior components such as seats, door cards, and dashboards also have part numbers. For instance, a front seat frame may be stamped with 644.531.011.00 (left) and 644.531.012.00 (right).

Special attention should be paid to trim and chrome parts, as many are unique to the 1959 model year due to changes in bumpers, taillights, and dashboard layout.

Resources for Cross-Referencing Part Numbers

To verify a part number for a 1959 356A, use reliable sources:

• Factory Parts Catalogs: Porsche produced detailed microfiche and printed catalogs for the 356A. Reprints are available from restoration suppliers. The catalog for the 356A T2 (1957-1959) is essential.
• Porsche Classic Website: Porsche’s official site provides part number search for classic models, including the 356A. However, not every part is listed.
• Porsche 356 Registry: A membership gives access to technical guides and part number databases compiled by owners and restorers.
• Books and Manuals: “Porsche 356 A Guide” by Brian Long and the “Porsche 356 Parts Manual” are excellent references.

Avoid relying solely on online forums or user-submitted lists, as errors occur. Always cross-check with official sources.

Common Mistakes When Searching by Part Number

• Confusing casting numbers with part numbers. Casting numbers are often raised on rough parts and are not the true Porsche part number.
• Assuming a similar-looking part from a later 356B or C will fit. Many parts are specific to the 1959 A model.
• Not accounting for superseded part numbers. A later revision may be correct but check that it does not alter appearance or function.

Final Recommendations

If you are restoring a 1959 Porsche 356A, invest in a factory parts catalog specific to the 356A T2. Use it alongside the Porsche Classic website to confirm part numbers. For rare or NOS (New Old Stock) parts, consult a specialist like Stoddard or Pelican Parts (their catalog is helpful for cross-referencing). When in doubt, contact a trusted 356 restorer who can verify the number by experience. Having a correct part number saves time, money, and ensures your car’s authenticity.