2018 Porsche 911 Targa S Parts: A Comprehensive Guide for Owners

The 2018 Porsche 911 Targa S is a unique blend of open-air freedom and rear-wheel-drive performance. While it shares much with the Carrera 4S, the Targa’s retractable roof and distinct body panels mean that sourcing the correct parts requires specific knowledge. Whether you’re restoring a used example, upgrading performance, or performing routine maintenance, this guide outlines the essential 2018 Porsche 911 Targa S parts, their compatibility, and key considerations for your purchase.

Understanding the 2018 Porsche 911 Targa S Part Numbers

The 2018 Porsche 911 Targa S (991.2 generation) uses a unique set of OEM part numbers that differ from the coupe and cabriolet versions. The most critical differences lie in the roof mechanism, rear window structure, and body seals. For example, the Targa bar—the fixed roll-over structure behind the windows—requires specific seal kits (part no. 991-565-123-XX) that are not shared with other models. Always verify fitment using your vehicle’s VIN or the original part number before ordering.

OEM parts from Porsche are manufactured to exact tolerances and often include a two-year warranty when purchased from an authorized dealer. However, many aftermarket suppliers offer equivalent parts for less, especially for common wear items like brake pads, filters, and ignition components.

Genuine OEM Parts vs. Aftermarket: What to Choose?

Genuine Porsche Parts

For critical components such as the Targa roof hydraulic system, roof latch motors, and electronic control units, stick with OEM. The Targa roof is a complex electro-hydraulic assembly, and aftermarket alternatives often lack the reliability required for daily use. Genuine parts also come with proper software calibration, which is essential for the roof’s operation.

Common OEM part categories:

• Engine: Oil filters (948-107-221-01), air filters (991-110-126-02), spark plugs (999-170-222-90)
• Brakes: Front pads (9A1-698-151-BD), rear rotors (991-352-041-00)
• Suspension: Control arms, struts, and bushings (use OEM for best ride quality)
• Targa-specific: Roof seal kit (991-561-911-00), hydraulic pump (987-624-102-04)

Aftermarket Upgrades

For performance enthusiasts, aftermarket parts can unlock more power, sharper handling, or reduced weight. Common upgrades for the 2018 Targa S:

• Exhaust systems: Cargraphic or Fabspeed cat-back systems fit the Targa’s underbody without drone.
• Intakes: Eventuri or BMC carbon fiber intakes improve throttle response.
• Suspension: KW Variant 3 coilovers lower the Targa while preserving comfort.
• Tuning: APR or GIAC ECU tunes add 50–80 hp.

Be cautious with modifications that affect emissions: the Targa S uses a specific exhaust configuration with rear mufflers that differ from the Carrera. Confirm that aftermarket parts are CARB-compliant if you’re in California.

Key Maintenance Parts for the 2018 Porsche 911 Targa S

Oil and Filters

The 2018 Targa S requires 0W-40 synthetic oil that meets Porsche A40 specification. Use OEM oil filters (948-107-221-01) or quality equivalents like Mann or Mahle. Change interval: every 10,000 miles or annually.

Brake Components

Standard iron rotors are 350mm front, 330mm rear. Ate or Brembo OEM replacements are recommended for daily driving. If you track the car, consider two-piece rotors from Girodisc or Racing Brake that reduce unsprung weight.

Cooling System

The Targa S uses the same coolant pipes and expansion tank as the Carrera, but the fender liners are different due to the retractable roof storage. Use OEM coolants (Porsche 935-006-001-05) to avoid corrosion.

Roof Maintenance

Lubricate the Targa roof seals annually with Porsche’s silicone grease (000-043-205-29) to prevent sticking and noise. The hydraulic fluid (Pentosin CHF 11S) should be checked every two years.

Performance Parts for the 2018 Porsche 911 Targa S

Engine Upgrades

• Intercoolers: OEM units are adequate for stock power, but for tuned cars, aftermarket from CSF or Treadstone improve heat rejection.
• Charge pipes: Aluminum pipes from Evolution Motorsports eliminate boost leaks.
• Turbo upgrades: For serious power, Pure Turbos offers Stage 2+ turbos that bolt in.

Exhaust Systems

• Axle-back: Cargraphic offers a switchable exhaust with electronic valves.
• Cat-back: Akrapovic Slip-On saves 12 lbs and adds 5 hp.
• Headers: Only if you’re building a dedicated track car; headers require a tune.

Suspension and Chassis

• Lowering springs: H&R (part 29156-1) lower the Targa by 0.8 inches.
• Sway bars: Eibach or H&R hollow bars reduce body roll without harshness.
• Chassis braces: The Zuffenhaus cross-brace stiffens the rear, compensating for open-roof flex.

Where to Source Parts (Without Marketplaces)

• Porsche dealerships: Best for OEM parts with warranty, but may charge list price.
• Online specialty retailers: Sites like Pelican Parts, FCP Euro, and Suncoast Porsche Parts offer OEM and aftermarket with discounts. FCP Euro’s lifetime replacement warranty is a bonus for wear items.
• Independent Porsche specialists: Often have in-house knowledge and can recommend reliable aftermarket brands.
• Forums: Rennlist and Planet-9.com have classified sections where owners sell used OEM parts.

Final Recommendation

For a 2018 Porsche 911 Targa S, prioritize OEM or high-quality aftermarket parts that match the car’s original specifications. The roof mechanism is unforgiving of subpar parts, so never compromise on seals, hydraulics, or electronics. For performance upgrades, start with a tune and exhaust—these transform the driving experience without sacrificing daily usability. If you’re maintaining a stock Targa, stick to OEM maintenance intervals and use genuine filters and oils. For modifications, choose parts from reputable brands with a track record on the 991.2 platform. Always double-check part numbers using your VIN before ordering, and consider joining a Porsche community to get real-world feedback on specific components. With careful selection, your 2018 911 Targa S will remain a thrilling and reliable grand tourer for years to come.