Porsche 911 G Body Parts Chart: A Complete Reference Guide

The Porsche 911 G body, produced from 1974 to 1989, is a beloved generation among enthusiasts. Whether you're restoring a classic or maintaining a daily driver, having a clear parts chart helps identify what you need. This guide organizes essential G body parts by system, with OEM and aftermarket options, common failure points, and practical buying advice.

Engine Components

Cylinder Heads & Valves

The 911 G body uses air-cooled flat-six engines. Cylinder heads for 2.7L, 3.0L, 3.2L, and turbo variants share basic architecture but differ in port sizes and valve diameters. The 3.2 Carrera heads (part number 930.104.101.0X) are popular upgrades for earlier engines. Look for cracks between valve seats – a common issue.

Pistons & Cylinders

Mahle and KS supply OEM pistons. For 3.0L SC engines, piston part numbers (930.103.913.00) are often superseded. Aftermarket JE or CP pistons are common for rebuilds. Cylinders are Nikasil-lined; avoid honing with traditional stones – use diamond hones only.

Camshafts & Timing

Camshafts are identified by part numbers stamped on the rear. The 3.2 Carrera used a 964-style cam profile. Timing chain tensioners on early G bodies are problematic; upgrade to the 964 hydraulic tensioners (part 964.105.225.02) to prevent chain slap.

Fuel Injection & Intake

CIS (Continuous Injection System) was used on SC and early Carreras. The fuel distributor (part 911.110.121.0X) is prone to diaphragm failure. Later 3.2 Carreras switched to DME (Digital Motor Electronics) with Motronic. Rebuilt ECUs are available from sources like Programma.

Transmission & Drivetrain

915 vs. G50 Transmission

The 915 (1974-1986) has a side-shift linkage that wears out. Upgrade parts include shift coupler bushings (911.424.030.00) and selector rod. The G50 (1987-1989) is stronger and smoother. Clutch kits for G50 use a hydraulic slave cylinder – common leak point.

Differential & Axles

Standard LSD (limited-slip differential) was optional. Stock axles (part 930.332.011.03) are durable, but CV joint boots fail. Aftermarket axles from DSS or The Driveshaft Shop offer upgraded strength.

Suspension & Steering

Front Suspension

G bodies have MacPherson struts up front. Strut inserts (Bilstein B6/B8) are direct replacements. Control arm bushings wear out – polyurethane options from Elephant Racing improve feel. Tie rod ends (part 911.347.081.00) are shared with earlier 911s.

Rear Suspension

The semi-trailing arm design uses torsion bars. Adjustable spring plates (like from Smart Racing) allow corner balancing. Rear shocks (Bilstein HD) are recommended. Bushings in the trailing arms (part 930.331.131.00) crack over time.

Steering Rack

Early cars used a worm-and-sector box; later cars have a ZF rack (part 911.347.091.00). Leaks at the pinion seal are common. Rebuild kits are available.

Brakes

Calipers & Rotors

Early G bodies have ATE or Girling calipers. The 3.2 Carrera got larger 24mm-thick rotors (part 930.351.043.00). Brake caliper rebuild kits (seals and pistons) are inexpensive. Upgraded to 930 Turbo brakes (3.2L) for better stopping power.

Master Cylinder & Booster

The master cylinder (part 911.355.011.0X) often leaks internally. The brake booster on later cars is vacuum-assisted; check the hose for cracks.

Body & Exterior

Panels & Trim

G body sheet metal is galvanized, but rust still appears around battery trays, smugglers boxes, and jack points. Replacement panels from Dansk or Restoration Design fit well. Front fenders (part 911.503.111.00) and rear quarters are available.

Bumpers & Lights

1974-1978 had chrome bumpers; 1979-1989 had plastic-covered units. Front turn signal housings (part 911.631.101.00) are shared across years. Headlight buckets (part 911.631.011.00) often need resealing.

Windshield & Seals

Wiring harnesses behind the dash degrade – replacement harnesses from places like Kaefer Engineering are worthwhile.

Interior

Seats & Carpets

Recaro seats were optional; standard seats are often worn. Seat hinge bushings (part 911.521.131.00) break. Carpet sets from Autos International are accurate aftermarket. Door panels (part 911.531.011.00) are prone to delamination.

Dashboard & Gauges

Dash cracks are common – a sunshield helps. Speedometer and tachometer rebuilds by North Hollywood Speedometer are reliable. Clock replacement is simple.

Practical Buying Guidance

OEM vs. Aftermarket

For critical safety items (brakes, suspension, steering), OEM or quality aftermarket (Bilstein, Brembo, Sachs) is best. For cosmetic parts, aftermarket like Dansk offers good fitment. Avoid no-name eBay parts for moving components.

Where to Source

Specialty retailers like Pelican Parts, ECS Tuning, and Sierra Madre Collection carry extensive G body inventory. For used parts, check enthusiast forums like Pelican Parts or Rennlist. Local Porsche dismantlers (e.g., PartsHeaven) can supply rare items.

Common Pitfalls

• Part numbers change: Always verify by VIN and production year.
• Rust in unexpected places: Inspect under carpets and battery area.
• Mixing 915 and G50 parts: They are not interchangeable.
• Old rubber hoses: Replace all coolant, fuel, and vacuum lines preventively.

Final Recommendation

Start with a thorough inspection of your G body’s VIN plate and build sheet to understand exactly what you have. Use this parts chart as a reference when ordering. For a full restoration, budget for all rubber seals, including the notorious rear main seal. Focus on safety and reliability first – engine, brakes, suspension – before cosmetics. A well-maintained G body is a joy to drive and holds value. If you’re unsure about a part, consult a specialist shop or online community before purchasing.