If you own a Porsche 964 (1989–1994 911) and have come across the part number 964 613 415 00, you likely need to understand what it is, where it goes, and why it matters. This article explains everything you need to know about this genuine Porsche component, from its function to replacement guidance, without fluff or hype.
What Is Porsche Part 964 613 415 00?
Part number 964 613 415 00 is a genuine Porsche factory part commonly referred to as the crankcase ventilation hose or oil breather hose. It is a rubber hose that connects the crankcase to the intake system on air‑cooled Porsche 911 models, specifically the 964 generation. This hose allows blow‑by gases (unburned fuel and oil vapor) to be recirculated into the engine for re‑burning, reducing emissions and maintaining proper crankcase pressure.
Physical Description
- Material: High‑temperature rubber with internal reinforcement.
- Shape: Curved to route from the crankcase breather outlet to the throttle body or air intake plenum.
- Length: Approximately 12 inches (30 cm), but exact dimensions vary.
- Color: Black or dark gray, often with a molded bend.
Where Is It Located?
On a Porsche 964 engine, the hose runs from the crankcase breather port (near the oil filler neck) to a fitting on the intake manifold or throttle body. It is typically positioned on the driver’s side of the engine (left side when viewed from the rear) and can be accessed from above after removing the engine cover.
Why Is This Part Important?
A functioning crankcase ventilation hose is critical for:
- Engine pressure regulation: Prevents pressure buildup inside the crankcase, which can cause oil leaks and seal damage.
- Oil vapor management: Routes oil mist back into the intake to be burned, reducing oil consumption and keeping the engine bay clean.
- Emissions compliance: Helps the vehicle meet emissions standards by recycling unburned hydrocarbons.
- Performance: A blocked or leaking hose can cause rough idle, hesitation, and poor fuel economy.
Symptoms of a Failing 964 613 415 00 Hose
Over time, heat and oil exposure cause the rubber to harden, crack, or collapse. Watch for these signs:
- Oil leaks around the hose connections or along its length.
- Musty oil smell inside the cabin or engine bay.
- Rough idle or stalling, especially when the engine is warm.
- Check engine light with codes related to lean mixture or air intake issues.
- Whistling noise from the engine bay due to a vacuum leak.
- Visible cracks, soft spots, or collapse when inspected.
If you notice any of these, inspect the hose immediately. A failed hose can also damage the mass airflow (MAF) sensor by allowing oil mist to contaminate it.
Compatibility: Which Porsche Models Use 964 613 415 00?
This part is specific to:
- Porsche 911 Carrera 2 / Carrera 4 (964) – all years 1989–1994.
- Porsche 911 Turbo (964) – 1991–1994.
- Porsche 911 Targa and Cabriolet variants of the 964.
It is not compatible with earlier 911 (G‑body) or later 993 models without modifications. Always verify using your VIN or a parts fiche.
Alternative Part Numbers
Porsche updates parts occasionally. Check if superseded part numbers exist for 964 613 415 00:
- 964 613 415 01 (if superseded, but usually the same design)
- 964 613 415 02 (may be a revised version with improved material)
Consult your dealer or a trusted parts supplier to confirm the latest number for your car.
How to Replace Porsche Part 964 613 415 00
Replacing this hose is a straightforward DIY job if you are comfortable with basic tools. Here’s a step‑by‑step overview:
Tools Needed
- Flathead screwdriver or hose clamp pliers.
- New hose (964 613 415 00 or superseded part).
- Clean rag.
- Optional: new spring‑type clamps (recommended over screw clamps).
Steps
- Engine cold: Ensure the engine is cool to avoid burns.
- Locate the hose: Remove the engine cover or access panel. The hose is visible on the driver’s side near the oil filler.
- Remove clamps: Loosen the two spring clamps or screw clamps at each end using pliers or a screwdriver.
- Disconnect: Gently twist and pull the hose off the breather fitting and the intake fitting. Use a rag to catch any oil drips.
- Inspect fittings: Clean the metal fittings if needed. Check for damage.
- Install new hose: Slide the new hose onto both fittings. Ensure it seats fully. Reinstall clamps. Spring clamps are preferred because they maintain consistent tension.
- Double‑check routing: Make sure the hose is not kinked or touching hot surfaces.
- Test: Start the engine and check for leaks or unusual noises. A brief idle will allow you to verify the repair.
Tips for a Smooth Replacement
- Use OEM or high‑quality aftermarket: Genuine Porsche hose is recommended for fit and durability. Some aftermarket brands (like Elring or Febi) offer comparable quality, but always check reviews from other 964 owners.
- Replace clamps: Old clamps can lose tension. New spring clamps cost little and ensure a secure seal.
- Inspect nearby hoses: While you have access, check the intake boot and other vacuum hoses for cracks.
Where to Buy Porsche Part 964 613 415 00
You can purchase this part from several sources (remember, avoid marketplace names in the article, but can mention types):
- Porsche dealerships: Genuine part, highest price, but guaranteed fit.
- Specialty Porsche parts retailers: Online stores focused on air‑cooled Porsche parts often stock this hose at a lower price than the dealer.
- Independent auto parts stores: Some carry OEM‑quality aftermarket options.
- Online parts vendors: Many reputable sites specialize in European car parts. Look for ones with clear return policies and real customer service.
Price range: Expect to pay $20–$50 for an OEM‑quality hose. Genuine Porsche may be $40–$60.
Frequently Asked Questions
Can I drive with a bad crankcase ventilation hose?
Not recommended. A leak can cause oil loss, poor performance, and potential engine damage if oil contaminates the intake system or if a large vacuum leak leads to a lean condition.
How long does the replacement hose last?
A quality hose typically lasts 10–15 years or 60,000–100,000 miles. Heat and oil exposure degrade the rubber, so replacement is a normal maintenance item for older 964s.
Is aftermarket okay?
Yes, if the aftermarket hose is made from high‑temperature rubber and matches the factory shape. Many owners use aftermarket without issue. However, some cheap hoses may collapse under vacuum, so choose a reputable brand.
Does this hose affect emissions testing?
Yes. A leaking or missing hose can cause a failed emissions test due to increased hydrocarbons or a triggered check engine light.
Final Recommendation
For most 964 owners, replacing a brittle or cracked crankcase ventilation hose is a cheap and effective way to restore engine reliability and prevent secondary issues. Porsche part 964 613 415 00 is the correct factory hose, and using an OEM or high‑quality aftermarket alternative is wise. Budget around $30–$60 for the part and less than an hour of your time. If you are not comfortable with DIY, a qualified independent mechanic familiar with air‑cooled Porsches can handle it quickly.
Given the age of these cars (over 30 years), proactive replacement of this hose—along with other rubber intake components—will keep your 964 running smoothly and avoid roadside surprises. Consider ordering one today if your hose shows any signs of aging.