Complete Guide to 2007 Porsche Boxster Parts: OEM vs Aftermarket

The 2007 Porsche Boxster (987 generation) is a rewarding sports car to own, but like any vehicle, its parts wear over time. Whether you are tackling routine maintenance, addressing a common failure point, or planning performance upgrades, choosing the right components is critical to maintaining reliability and driving enjoyment. This guide covers the most frequently needed parts for the 2007 Boxster, explains the differences between OEM and aftermarket options, and offers practical advice for finding the best parts for your budget and goals.

Common 2007 Porsche Boxster Parts That Need Replacement

The 2007 model year benefits from the M97 engine, which improved on earlier IMS bearing issues, but several components still require attention as mileage increases.

Engine Components

• Water Pump: The plastic impeller water pump is a known weak point. Replacement with an OEM or quality aftermarket pump (with metal impeller) is wise around 60,000–80,000 miles.
• Spark Plugs and Coil Packs: Misfires often stem from failed coil packs. Replace with Bosch or Beru OEM-equivalent parts. Spark plugs should be changed per service intervals.
• Serpentine Belt and Tensioner: Inspect for cracks and replace as a set.
• Air/Oil Separator (AOS): A failing AOS can cause smoke or rough idle. Genuine Porsche or high-quality aftermarket replacements are available.

Cooling System

• Expansion Tank: Plastic tanks become brittle and leak. Upgrade to an OEM or reinforced aftermarket tank.
• Coolant Hoses: The coolant pipes under the intake manifold can corrode. Use OEM or silicone aftermarket hoses for longevity.

Suspension and Brakes

• Control Arms and Coffin Arms: Worn bushings cause clunking and vague steering. Replace with OEM or heavy-duty aftermarket arms (e.g., with polyurethane bushings).
• Shock Absorbers: The original Bilstein or Sachs units fade over time. Consider OEM replacements or performance options like Koni or Bilstein B6/B8.
• Brake Rotors and Pads: The car is heavy, so rotors warp. Use OEM rotors or quality aftermarket (e.g., Brembo, Zimmermann) with ceramic pads for less dust.

Interior and Electronics

• Window Regulators: Cable-type regulators break frequently. Replace with upgraded aftermarket units that use metal components.
• Convertible Top Hydraulics: Cylinders leak. Aftermarket rebuild kits or complete cylinders are available.
• Radio and Navigation: The PCM 2.0 unit may fail. Aftermarket head units can be installed with proper harnesses.

OEM vs Aftermarket: Which Should You Choose?

Deciding between Original Equipment Manufacturer (Porsche-branded) and aftermarket parts depends on the component, your budget, and how long you plan to keep the car.

OEM Parts – The Safe Bet

• Fit and Function: Guaranteed to match factory specs. For critical items like control arms, sensors, and cooling system parts, OEM minimizes risk.
• Cost: Higher, but often includes a warranty (typically two years).
• Availability: Available through Porsche dealerships and online retailers (use part numbers from diagrams).

Aftermarket Parts – Value and Upgrades

• Quality Variance: Stick with reputable brands (e.g., Bosch, Hella, Febi, Rein, Meyle). Avoid no-name parts.
• Performance: For suspension and brakes, high-quality aftermarket can exceed OEM performance (e.g., Bilstein, KW, Brembo).
• Cost Savings: Typically 20-40% less than OEM, but factor in potential fitment issues.

Tip: For safety-critical parts (brakes, steering, engine), lean toward OEM or premium aftermarket. For cosmetic or wear items like window regulators, quality aftermarket often works as well.

Finding the Right Part Numbers

Avoid guesswork by using your VIN and online parts diagrams. Many Porsche parts websites allow you to search by VIN to generate exact part numbers. Aftermarket manufacturers often list OE cross-references. Write down the part numbers before ordering to ensure compatibility.

Budgeting for Common Repairs

Here are approximate prices (USD) for common 2007 Boxster parts (excluding labor):

• Water pump and thermostat: $200–$350 (OEM)
• Control arm set (front): $400–$800 (OEM)
• Brake rotors and pads (all four): $600–$1,200 (OEM)
• Window regulator: $100–$250 (aftermarket), $300–$500 (OEM)
• Convertible top cylinder: $80–$150 (aftermarket), $200–$400 (OEM)

Budget extra for unexpected issues like seized bolts or broken clips.

Practical Recommendations

• Start with a thorough inspection: Identify which parts are truly worn. Use the service history as a guide.
• Prioritize safety and reliability: Brakes, suspension, and cooling deserve top-dollar parts. Cosmetic parts can be aftermarket.
• Buy complete kits: For timing belt/water pump jobs, get a full kit with all gaskets to save time.
• Use reputable suppliers: Choose established Porsche specialists or aftermarket distributors with clear return policies.
• Consider upgraded versions: For example, a metal water pump impeller or polyurethane bushings can last longer than OEM, but expect slightly different feel.

Owning a 2007 Porsche Boxster means enjoying a mid-engine sports car that rewards proper maintenance. By selecting the right parts for each job, you keep your Boxster running at its best without overspending. Focus on quality where it matters, and you’ll extend the life of your car for many more miles of top-down driving.