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Air con belts
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MKII GT2 RS 2011-13
The Genuine Porsche 99919237951 drive belt is an OE Poly-V / serpentine belt for selected Porsche 996 Turbo and 997 Turbo models with air conditioning. It drives the engine auxiliary components according to the A/C belt routing, helping maintain reliable charging, air-conditioning and accessory system operation. Ideal for routine service or replacing a cracked, noisy, slipping or worn original belt.
Fits:
Porsche 996 Turbo 2000-2005 M96.70 Engine
Porsche 996 GT2 M96.70 Engine
Porsche 997 Turbo 2007-2009 3.6L M97.70 Engine
Porsche 997 GT2 RS 2011 M97.70 Engine
Diagram ref no 9
This belt is specifically listed for Porsche 996 Turbo / 997 Turbo applications with air conditioning. It replaces earlier Porsche part number 99919237950.
What This Part Does / Functions
• Transfers drive from the engine pulley system to auxiliary components
• Supports operation of the alternator and other belt-driven accessories
• Works with the air-conditioning compressor drive layout on cars with A/C
• Helps maintain correct accessory belt routing and pulley engagement
• Supports reliable charging and auxiliary system operation
• Helps prevent belt slip, squeal and accessory-drive faults when correctly fitted
• Provides the correct OE Porsche belt profile, length and fitment
• Replaces a cracked, worn, stretched, glazed or noisy original belt.
Why Replace This Part?
The drive belt is a service wear item and is exposed to heat, tension, pulley contact and engine movement. Over time, it can crack, glaze, stretch, fray or lose grip on the pulleys. A worn belt may cause squealing, slipping, charging issues, air-conditioning faults or complete accessory-drive failure. Replacing it with a Genuine Porsche OE drive belt helps restore reliable accessory drive operation and ensures the correct belt specification is used for Turbo models with air conditioning.
When to Replace This Part
• f the belt is cracked, glazed, frayed or visibly worn
• If the belt squeals, slips or makes noise during engine operation
• If the belt has stretched or no longer runs correctly
• During scheduled service or preventative belt replacement
• When replacing the belt tensioner, idler pulleys, alternator or A/C compressor
• If the belt has been contaminated by oil, coolant or debris
• If charging or air-conditioning faults are linked to belt slip
• When restoring the engine bay with correct OE Porsche service parts.
Where It Fits on the Car
This belt fits on the engine accessory drive system. It routes around the relevant pulleys, tensioner and driven components according to the factory air-conditioning belt layout.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99919237951
The product you are viewing cross references to these numbers
- Porsche 996 TURBO 2000-05
- Porsche 996 GT2 2001-05
- Porsche 997 MK1 TURBO 2007-09
- Porsche 997 MKII GT2 RS 2011-13
This OE Match drive belt is a replacement auxiliary engine belt for Porsche 996 Turbo and 997 Turbo models equipped with air conditioning. It is designed to match the original-style fitment and function. This replacement auxiliary belt helps drive engine accessories and supports reliable operation of the vehicle’s charging and auxiliary systems.
Fits:
Porsche 996 Turbo 2000-2005 M96.70 Engine
Porsche 996 GT2 M96.70 Engine
Porsche 997 Turbo 2007-2009 3.6L M97.70 Engine
Porsche 997 GT2 RS 2011 M97.70 Engine
Diagram ref no 9
The drive belt transfers rotational power from the engine pulley to the relevant auxiliary components. On vehicles with air conditioning, the correct belt specification is essential for proper pulley contact, belt tension, and reliable accessory drive operation.
Functions
• Replaces the auxiliary drive belt
• Suitable for cars with air conditioning
• Transfers drive from the engine pulley to auxiliary components
• Helps maintain correct belt tension and pulley contact
• Supports reliable charging and accessory system operation
• Replaces cracked, glazed, stretched, frayed, noisy, or slipping belts
• OE Match replacement for Porsche 996 Turbo and 997 Turbo engine service.
Why Replace This Part?
Drive belts wear over time due to heat, vibration, pulley contact, age, tension changes, and engine bay conditions. A worn belt can crack, glaze, stretch, fray, squeal, slip, or fail completely. If the belt fails, driven auxiliary systems may stop operating correctly, which can lead to warning lights, charging faults, accessory issues, or vehicle breakdown. Replacing the belt helps restore dependable auxiliary drive performance.
When to Replace This Part
• The drive belt is cracked, glazed, frayed, stretched, or worn
• Belt squeal, chirping, or slipping is present
• The belt does not track correctly on the pulleys
• The alternator, pulleys, tensioner, or related components are being serviced
• Charging or accessory drive faults are present
• Preventative belt replacement is being carried out during scheduled maintenance
• The vehicle is undergoing Porsche 996 Turbo or 997 Turbo engine service.
Where it fits on the car
This drive belt fits within the engine auxiliary belt drive system on Porsche 996 Turbo and 997 Turbo models with air conditioning. It runs around the relevant pulleys according to the factory belt routing.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99919237951
The product you are viewing cross references to these numbers
Porsche Air Con Belts
At Design911, we supply a wide range of air con belts for Porsche models, helping you maintain, personalise and enjoy your car.
Why do Porsche Air Con Belts matter?
Air con belts sit within the auxiliary drive system on your Porsche and help the air conditioning compressor work as intended. When these parts wear, age or are incorrectly tensioned you can get issues such as squealing noises, loss of cooling, vibration or warning lights, so keeping them in good condition helps the car stay comfortable and dependable in daily use.
- Help the relevant system on your Porsche work as intended
- Reduce the chance of unexpected issues, noise, leaks or advisory notes
- Maintain comfort, refinement and everyday usability
- Support long-term reliability and resale value
Common options & kits
Individual replacement parts Specific items to address a particular area or issue without changing everything at once.
- Ideal for targeted repairs
- Lets you replace only what is needed
- Helps keep initial costs under control
Matched sets or pairs Components supplied together so both sides or related items are renewed at the same time.
- Consistent feel and performance
- Helps avoid uneven wear or behaviour
- A sensible choice for routine maintenance
Complete kits Grouped parts designed to refresh a whole system or area in one go, useful for upgrades and restorations.
- Everything specified in a single package
- Saves time compared with sourcing parts individually
- Ideal when upgrading or restoring your Porsche
Brands & quality options
At Design911, we stock genuine Porsche parts where available, plus OEM-equivalent and carefully selected aftermarket brands. This lets you choose between keeping things original, adding subtle upgrades or managing budgets on everyday maintenance.
Dansk Dansk supply a wide range of replacement components that allow older and newer Porsche models to stay on the road. Their catalogue focuses on practicality and coverage across many different generations.
Dayco Dayco is a leader in the Original Equipment Market, partnering with global manufacturers to develop high quality belt systems for Porsche models. Their products are widely used for reliable fitment and service life when replacing air con and auxiliary belts.
Gates Selecting the correct Gates part number and checking fitment details helps ensure the right belt for your specific Porsche model.
Meyle Meyle manufactures its own MEYLE-branded parts, supplying Porsche workshops in many countries. Their range focuses on reliable replacement components suitable for regular servicing and repair work.
OE Match OE Match offers a broad catalogue of Porsche components covering many generations. Choosing the right reference and cross-checking specifications helps you obtain an air con belt that matches your Porsche application.
When should you review or replace your Porsche air con belts?
Checking air con belts regularly helps you spot wear, damage or age-related deterioration before it affects safety, comfort or reliability.
- Existing parts are worn, noisy, cracked, frayed, corroded or contaminated
- You notice changes in cooling performance, belt squeal, vibration or unusual noises
- Warning messages, advisory notes or MOT comments appear
- You are upgrading the auxiliary drive system or working on a project or restoration
- You want extra peace of mind before a long trip or hot-weather driving
If any of these apply, it is a good time to review your air con belts and replace anything that is past its best so your Porsche stays dependable and enjoyable to drive.
Explore Porsche air con belts with Design911
Browse air con belts for Porsche at Design911 — from individual belts to complete auxiliary drive solutions — and find options to suit everyday maintenance, upgrades and full projects.
