The Air-Cooled NLA Crisis

For most of their lives, the Porsche 964 and 993 sat in an odd middle ground: expensive enough that owners could afford specialist repair, recent enough that Porsche AG still catalogued most parts. That era is over. Both models are now firmly in the NLA phase — no-longer-available from Porsche's own supply chain — and the discontinuation rate has been accelerating since the early 2020s.

The 993 ceased production in 1998, making the youngest examples now approaching thirty years old. The 964 is older still, with the earliest 1989 Carreras now over thirty-five years from the factory. Porsche AG's heritage parts programme covers some items, but the emphasis has shifted towards the earlier 911 generations (F-series, G-series) rather than the 964/993 cohort, which spent its first decade being treated as too modern for classic parts attention.

The market has responded — as it always does — with specialists filling the gap. The sourcing picture for 964 and 993 owners in 2026 is genuinely workable if you know where to look and are prepared to plan ahead. The risk is the restorer who assumes the parts will materialise when needed. They will not. Sourcing should begin before the car is disassembled, not after.

Porsche Classic Restoration Challenge 2026

The Porsche Classic Restoration Challenge 2026, currently underway, has increased competition for the same pool of NLA parts. Industry reporting from April 2026 identifies parts availability as the number-one challenge facing 964 and 993 restorers this year. Build your sourcing list early — the market tightens when competition season is active.

964 vs 993 — Know Your Generation

The 964 (Type 964, 1989–1994) was Porsche's major evolutionary step for the 911 after the long-running G-series. It introduced coil springs replacing the earlier torsion bar rear suspension, ABS as standard, and a significantly revised body with integrated bumpers. The 964 came in Carrera 2 (rear-wheel drive), Carrera 4 (four-wheel drive), Targa, Cabriolet, and Turbo variants — the latter using a 3.3-litre turbocharged flat-six. The 964 RS Clubsport is a factory lightweight variant of particular collector interest.

The 993 (Type 993, 1994–1998) replaced the 964 and introduced the most significant mechanical change in 911 history up to that point: a fully independent multi-link rear suspension replacing the 964's semi-trailing arm geometry. This transformation in handling character makes the 993 one of the most sought-after 911 generations. The 993 Turbo produced in 1995 was the first 911 Turbo with all-wheel drive and twin turbochargers. The 993 GT2 and GT2 Evo are factory competition variants.

964 (1989–1994)
3.6-litre air-cooled flat-six (Carrera) · 3.3-litre turbo (Turbo)
Parts compatibility varies significantly between 964 variants. The 964 Carrera 2 and Carrera 4 share most body and mechanical components but differ in drivetrain. The 964 Turbo uses different bodywork, brakes, and suspension from the naturally aspirated cars.
  • Carrera 2 / Carrera 4 — widebody vs narrow body
  • Turbo — unique wide-body, enlarged brakes
  • RS / RS America — lightweight, stripped interior
  • Speedster — limited run, unique windscreen
993 (1994–1998)
3.6-litre air-cooled flat-six (Carrera) · twin-turbo (Turbo)
The 993's multi-link rear suspension is entirely different from the 964 — no suspension parts cross between generations. The 993 Turbo uses a twin-turbocharged engine unavailable on the 964 Turbo. Interior trim and electrical systems are substantially revised from 964 specification.
  • Carrera / Carrera 4 — narrow and wide body
  • Turbo / Turbo S — twin-turbo, all-wheel drive
  • GT2 / GT2 Evo — factory competition
  • Targa — unique glass roof panel

Parts compatibility between the 964 and 993 is limited. Some engine internals share dimensions, certain oil cooler components cross over, and some miscellaneous hardware is shared — but bodywork, interior trim, suspension, electrical systems, and the rear end architecture are entirely model-specific. Always quote your exact model, year, and variant when ordering from a specialist.

Confirmed NLA and Hard-to-Source Parts

The following represent the most frequently reported NLA situations for 964 and 993 owners in 2026. The list is not exhaustive — Porsche's discontinuation programme moves continuously — but these are the parts that cause the most difficulty in active restoration projects.

Air Guide Behind Alternator
The air ducting behind the alternator that directs cooling air through the engine tin is confirmed NLA from Porsche AG. This piece degrades with heat cycling and is frequently missing on cars that have had engine work. No aftermarket reproduction exists at the time of writing — used OEM from a breaker engine is the only current route.
964 & 993 Engine / Cooling
Carrera Club Sport Fender Decal
The original Carrera Club Sport fender decal set for the 964 RS Clubsport is NLA from Porsche. Reproduction versions exist from independent suppliers but quality and accuracy vary — the original script and colour profile are difficult to replicate exactly. For concours-level restorations, provenance of the decal set matters.
964 RS Clubsport Cosmetic
Clutch Shaft Update Kit
The clutch shaft intermediate bearing update kit, which addresses wear in the G50 gearbox's clutch actuation mechanism, is now NLA from Porsche. This is a maintenance item that matters on high-mileage cars — the intermediate bearing is the first thing to check on any 964 with a vague or notchy clutch feel. LN Engineering is the primary source for replacement components.
964 (G50 gearbox) Drivetrain
Rubber Seals — Door, Boot, Bonnet
Rubber door seals, boot lid seals, front lid (bonnet) seals, and window surround rubber are progressively NLA from Porsche. Both 964 and 993 seals are affected. Heritage Parts Centre in the UK carries reproduction and NOS rubber for both generations. Porsche Classic has some items intermittently. Budget for full seal replacement on any restoration — perished rubber is universal on these cars now.
964 & 993 Rubber & Seals
Body Trim and Mouldings
Exterior body trim — side mouldings, bumper trim inserts, door handle surrounds, mirror base covers — is NLA across both generations. Many pieces are plastic and have degraded or been damaged over the car's life. 911and356.com and Stoddard NLA both carry selected trim items; eBay from European (especially German) sellers is the most consistent source for used OEM in acceptable condition.
964 & 993 Body Trim
Interior Trim Pieces
Dashboard inserts, centre console trim, door card sections, sun visor clips, and interior switch surrounds are progressively NLA. The 964 and 993 interiors used a significant amount of plastic that UV-degrades and becomes brittle. Used OEM from low-mileage examples is the realistic route for most interior items. Pelican Parts and 911and356.com list selected interior trim.
964 & 993 Interior
Engine Tin and Heat Exchangers
The engine tinwork — side covers, lower tin, heat deflectors — and the factory heat exchangers are increasingly hard to source new. Reproduction heat exchangers exist from aftermarket suppliers but quality varies. For concours restoration, used OEM tinwork in good condition is preferred; reproduction items are serviceable for driving restorations.
964 & 993 Engine
993 Rear Wiper Motor
The 993 Targa and Cabriolet rear wiper motor is NLA from Porsche. Failures are common — the motor seals fail and water ingress destroys the unit. Used OEM from breaker cars is the current route. Several specialists rebuild failed units; this is worth investigating before paying breaker prices for an untested secondhand motor.
993 Targa / Cabriolet Electrical

Sourcing a specific NLA item for a 964 or 993 restoration? Tell Geoff your variant, model year, and what you need — he'll suggest the most realistic current route. Ask Geoff →

Bodywork and Rust Hotspots

The 964 and 993 were built to a reasonable standard for their era, but thirty-plus years of service have revealed the predictable weak points. On a car of this value, a proper pre-purchase inspection — including access beneath the carpets, within the sills, and through the engine bay — is not optional. The following are the areas that most consistently require attention.

B-Posts (Door Pillars)
The B-posts corrode from the inside out — water gets in from above, typically through a degraded seal at the roof joint, and sits against the inner steel. By the time corrosion is visible on the outer surface it is already structurally significant. Proper B-post repair requires cutting back to sound metal and welding in new sections; cosmetic treatment alone will not hold. This is one of the most expensive structural repairs on the 964/993 bodyshell.
964 & 993 Structural
Sills (Inner and Outer)
The sills collect road debris and water through the drainage holes — which become blocked over time and trap moisture against the inner sill. Inner sill corrosion is often invisible without removing the outer sill trim. On the 964 especially, the inner sill structure is part of the body rigidity. Proper sill repair is a full structural job, not a cosmetic one — beware of cars with filler over rusted sills.
964 & 993 Structural / Cosmetic
A-Pillars
The A-pillar bases — where the pillars meet the sill and scuttle structure — collect water and are prone to corrosion that is difficult to see without removing interior trim and the windscreen. On cars that have had windscreen replacements, the seal quality matters; poorly sealed windscreens allow persistent water ingress directly onto the A-pillar structure.
964 & 993 Structural
Scuttle Panel
The scuttle — the panel beneath the windscreen at the base of the front lid — traps leaves, debris, and moisture. The scuttle drain channels block over time, causing water to pond directly against the steel. Scuttle corrosion is extremely common on unrestored 964s and 993s, and repair requires windscreen removal to access properly. Inspect the drain channels with a torch before buying any unrestored example.
964 & 993 Body
Fuel Tank Area
The front luggage compartment area around the fuel tank (mounted at the front on 964 and 993) can corrode if the tank has leaked or if moisture has accumulated in the tank bay. Inspect the floor of the front boot for rust blistering and the structural members around the tank mounting points. Fuel tank replacement on a corroded tank bay is a more substantial job than it might appear.
964 & 993 Body / Mechanical

Assessing a 964 or 993 before purchase and want to understand the rust risk on a specific car? Tell Geoff what you've found and he'll help you evaluate it. Ask Geoff →

Engine Parts — The Mahle Situation

The 3.6-litre air-cooled flat-six used in the 964 and 993 Carrera is one of the most documented air-cooled engines in the world, thanks to decades of specialist attention. For the most part, engine rebuild parts remain available through the specialist network — but the situation for pistons and cylinders has changed materially.

Porsche AG discontinued OEM replacement pistons for the 964 and 993 air-cooled engines. The replacement supply now runs through Mahle Motorsports, who produce forged piston sets for both the 964 Carrera and 993 Turbo applications. These are available through Stoddard NLA and LN Engineering, among other specialists. Mahle's motorsports-grade forgings are considered an upgrade on the original cast pistons in terms of durability under sustained high-temperature running.

LN Engineering goes further. They produce complete piston and cylinder kits for the 964 engine that address the bore scoring issue — a known failure mode where the Nikasil-lined cylinders suffer damage from fuel contamination or oil starvation. Their Nickies cylinder kits use a proprietary Nickel Silicon Carbide bore coating that is significantly more resistant to scoring than the original Nikasil. For any 964 engine rebuild, the LN Engineering kit is worth understanding before committing to standard-spec replacement parts.

Bore Scoring — The 964's Engine Problem

The 964 3.6-litre flat-six has a documented history of bore scoring, particularly in markets where sulphur-contaminated fuel was used. Affected engines develop a distinctive ticking or rattling noise as the bores lose their Nikasil coating. An endoscope inspection of the bores before any 964 purchase is strongly recommended. If bore scoring is present, the engine requires a full rebuild with cylinder replacement — LN Engineering's Nickies kit eliminates the vulnerability going forward.

For the 993 Turbo engine — the twin-turbo unit fitted from 1995 — the parts picture is different. The 993 Turbo's 3.6-litre twin-turbo engine has a smaller specialist community than the naturally aspirated engine, and some components are genuinely difficult to source. Freisinger Motorsport in Germany has a particular depth of knowledge and stock for 993 Turbo mechanical parts.

Where to Source Parts

Here is the honest picture for 964 and 993 sourcing in 2026. No single supplier covers everything — serious restorations typically draw from multiple channels.

Supplier Speciality Strengths Watch Out For
Stoddard NLA US Specialist · Est. 1957 NLA and hard-to-find 911 parts — the specialist of record since 1957 The primary US specialist for 964 and 993 NLA parts. Stoddard have been sourcing discontinued Porsche parts since 1957 and carry genuine NLA stock, NOS items, and reproduction parts for air-cooled 911s. Their catalogue for 964/993 is the most comprehensive single source in North America. Staff understand the model-year differences and variant-specific requirements. Demand for 964/993 parts is high in 2026 — some items sell quickly and stock is not always replenished. Contact them directly for critical items rather than relying solely on the web catalogue.
911and356.com Air-Cooled Specialist Air-cooled 911 and 356 parts — body trim, interior, mechanical Specialises in the harder-to-find items for air-cooled 911s including the 964 and 993. Particularly useful for body trim, interior pieces, and electrical components that other suppliers do not stock. Their catalogue covers items Stoddard may not carry. Worth checking in parallel with any Stoddard search. Smaller catalogue than Stoddard for mechanical items. Stock on rare trim pieces can be limited — enquire before assuming availability.
Freisinger Motorsport German Specialist Performance and mechanical parts — 964 and 993 Turbo focus German specialist with particular depth in 993 Turbo mechanical parts and performance components for both 964 and 993. Freisinger have been part of the German Porsche racing scene for decades. For anything Turbo-specific — intercoolers, wastegate components, turbo ancillaries — they are the go-to European source. Shipping to the US is straightforward for high-value mechanical items. European pricing plus shipping and import duty adds to cost. Not the primary route for body trim or interior items. German-language catalogue; email enquiries in English are handled promptly.
LN Engineering Engine Rebuild Specialist 964/993 engine rebuild — Nickies kits, Mahle pistons, bore scoring solutions The authoritative source for 964 engine rebuild parts, particularly their Nickies piston and cylinder kits that eliminate the bore scoring vulnerability. Carries Mahle Motorsports piston sets. Deep technical knowledge of the 964 and 993 flat-six failure modes. For any engine rebuild on a 964, LN Engineering should be consulted before parts are ordered. Focused on engine internals — not a general-purpose supplier for body or trim items. Lead times on specialist kits can be several weeks.
Parts Klassik Air-Cooled Specialist Mechanical spares for 964 and 993 — broad catalogue Carries a broad range of mechanical parts for 964 and 993 including suspension components, drivetrain items, engine ancillaries, and service parts. Competitive pricing relative to Stoddard on some lines. Worth checking for mechanical and service items before assuming something is genuinely unavailable. Less strong on cosmetic, trim, and interior items. Verify compatibility with your specific variant before ordering.
Heritage Parts Centre UK Specialist Rubber seals, trim clips, and interior items for classic Porsche UK-based specialist with strong coverage of rubber seals, body seals, trim clips, and interior items for 964 and 993. Particularly useful for the sealing and trim items that other mechanical specialists neglect. Good stock of reproduction rubber that is difficult to source elsewhere. Reliable for UK and European orders; ships worldwide. Shipping costs from the UK add up for smaller orders. Check import duty for US orders. Not a source for mechanical engine parts.
Pelican Parts Aftermarket / OEM Broad catalogue — service parts, mechanical, some OEM Well-known US supplier with good coverage of 964 and 993 service and mechanical parts. Useful for planned maintenance — oil filters, belts, gaskets, brake components. Their technical articles and DIY guides are among the best available for 964/993 maintenance procedures. Carries both OEM-equivalent and aftermarket options. Not strong on NLA or genuinely discontinued items. Catalogue can show items as available that are on long lead time or sourced to order. Verify stock before relying on Pelican for a restoration-critical part.
eBay Marketplace Used OEM, NOS, and European market stock — essential channel eBay remains an essential sourcing channel for 964 and 993 parts. German sellers in particular hold significant NOS and used OEM stock — German cars are often better preserved and German sellers are active on the platform. Japanese sellers occasionally surface rare NOS items from the substantial Porsche market in Japan. Used OEM trim, interior pieces, and electrical components are regularly available. Condition varies enormously. Ask sellers for photos of part numbers and OEM stamps. Confirm compatibility with your specific model year and variant. Returns on international transactions are rarely simple. Be cautious of incorrect listings that cross 964 and 993 items.

Stoddard is the starting point but not always the ending point. Tell Geoff what you're after and he'll look at which suppliers are most likely to have it. Ask Geoff →

OEM vs Reproduction vs Used-Original — What Matters on a 964/993

At restoration values of £60,000–£200,000, this question has a different weight than it does for a £5,000 classic. The guidance below reflects the current market and what most specialists actually recommend.

Safety-Critical Components — Never Pattern
Brakes, wheel bearings, steering components, suspension arms, and fuel system parts require quality sourcing regardless of price. For the 964 and 993, reputable aftermarket (Brembo, ATE, Sachs, Bilstein, Meyle HD) is acceptable for service items. Pattern parts from unidentified origins are not acceptable on a car of this value or at any speed. The investment in a proper set of brake components is trivial against a restoration budget of this size.
Always quality — never pattern
Engine Internals — Quality Above All
For any engine rebuild, the quality of pistons, rings, bearings, and seals determines how long the rebuild lasts. On the 964 specifically, the bore scoring history makes using LN Engineering or Mahle Motorsports components the correct decision — not economy items. A proper engine rebuild on a 964 or 993 is a significant financial event; matching component quality to the investment is basic sense.
Mahle / LN Engineering — not economy parts
Cosmetic and Trim — Originality Has Value
For concours-level restorations, original Porsche OEM trim, decals, and interior pieces command a premium but retain value in the finished car. Reproduction trim items exist for many 964/993 pieces, but quality varies significantly and some reproductions are detectable on inspection. For a driver-quality restoration, quality reproduction is acceptable. For a car being presented at the Porsche Classic Restoration Challenge or similar, originality matters and is assessed.
Original OEM preferred for concours — reproduction acceptable for drivers
Service and Maintenance Items — Reputable Aftermarket Fine
Filters, belts, spark plugs, coolant hoses, and similar consumable items are well served by reputable aftermarket. Bosch, NGK, Mann, Mahle, and Meyle produce quality equivalents for 964 and 993 service items. There is no benefit in paying Porsche main dealer prices for an oil filter. Save the budget for the parts where it actually matters.
Reputable aftermarket — fully acceptable
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Frequently Asked Questions

Where can I buy Porsche 964 and 993 NLA parts?
Stoddard NLA (Oakwood, Ohio) has been the leading US specialist since 1957 and carries the broadest catalogue of genuine NLA and new-old-stock 964/993 parts. 911and356.com specialises in harder-to-find air-cooled parts including body trim and interior pieces. Freisinger Motorsport in Germany is the go-to source for performance and mechanical items. Parts Klassik covers a wide range of 964 and 993 mechanical spares. Heritage Parts Centre in the UK stocks rubber seals, trim clips, and interior items. For used OEM and NOS, eBay remains an essential channel — particularly for German and Japanese sellers who hold significant air-cooled stock.
What is the difference between 964 and 993 Porsche 911 parts compatibility?
The 964 (1989–1994) and 993 (1994–1998) share the same basic air-cooled flat-six architecture but differ substantially in bodywork, suspension geometry, interior trim, and electrical systems. The 993 introduced a new multi-link rear suspension (replacing the semi-trailing arm of the 964) and a significantly revised interior. Body panels do not cross between the two generations. Some mechanical items — including certain engine internals, oil cooler components, and gearbox parts — share part numbers, but always verify against the specific model year before ordering. The 993 Turbo uses a twin-turbo engine not fitted to the 964 Turbo's single-turbo configuration.
Are Porsche 964 and 993 pistons still available?
Porsche AG discontinued OEM pistons for the 964 and 993 air-cooled engines. The primary source for new replacement pistons is now Mahle Motorsports, who produce high-quality forged pistons for 964 and 993 Turbo applications. These are available through Stoddard NLA and LN Engineering among others. LN Engineering additionally produces upgraded piston and cylinder kits specifically designed to address the bore scoring issues common on 964 and early 993 engines.
What are the worst rust areas on a Porsche 964 and 993?
The 964 and 993 have several documented rust hotspots that every buyer and restorer should inspect carefully. The B-posts (door pillars) corrode from the inside out and are structurally significant — inner sill and B-post rot is expensive to repair properly. The sills themselves collect water and road debris; inner sill corrosion is common and often hidden behind outer trim. The A-pillars can rust at the base where they meet the sill. The scuttle panel (the area beneath the windscreen where the bonnet meets the bodyshell) traps debris and moisture. The fuel tank area on older 964s is worth inspecting for corrosion in the surrounding metalwork. A pre-purchase inspection by a marque specialist is strongly recommended on any air-cooled 911.
Is the Porsche Classic Restoration Challenge 2026 making 964/993 parts harder to find?
The Porsche Classic Restoration Challenge 2026, currently underway, has increased awareness of and demand for concours-condition air-cooled 911s. Industry reporting from April 2026 identifies parts availability as the number-one challenge facing 964 and 993 restorers this year. The competition has drawn more restorers into the market simultaneously, which has tightened availability on already-scarce NLA items — particularly cosmetic parts such as body trim, interior pieces, and decal sets. Sourcing well ahead of any restoration project is strongly advisable in the current climate.
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Buyer's Responsibility
Part numbers, compatibility information, and supplier availability shown on this page were correct at the time of writing (May 2026). The Porsche 964 and 993 were produced across a six-year and four-year span respectively, with numerous variants, limited-production models, and regional specification differences. Always verify part numbers against your specific vehicle's VIN, engine number, and production date before ordering. The 964 and 993 share some parts but differ substantially in suspension, interior, and electrical systems — always confirm your exact model. Suppliers, stock availability, and pricing change. CarSpanner is a parts-finding assistant, not a parts supplier, and cannot accept liability for misidentified or incorrectly ordered parts.