OEM Knowledge Base

Genuine Parts.
Real Expertise.

How-to guides, part number references, and OEM advice for BMW, Mercedes-Benz, Audi, VW, Porsche, Volvo, and Toyota owners.

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OEM Guide

OEM Timing Belts: Why You Should Never Go Cheap

The timing belt is the most critical maintenance item on your engine. Here is why OEM specification matters and what happens when it fails.

OEM Guide

How to Spot Counterfeit OEM Car Parts

Counterfeit OEM parts are more common than you think. Learn the warning signs, how to check authenticity, and how to buy safely.

Toyota Parts Guide

Toyota OEM Parts vs Denso: Understanding the Difference

Toyota and Denso have a unique relationship. Here is what it means for parts sourcing, quality, and finding genuine Toyota OEM components.

Volvo Brand Guide

Volvo Genuine Parts Guide: V40, V60, XC60 and More

Complete guide to sourcing genuine Volvo OEM parts. Covers the Volvo parts system, CEM modules, common repairs, and independent suppliers.

Porsche Brand Guide

Porsche OEM Parts: Precision Engineering Demands Genuine Parts

Why genuine OEM parts are non-negotiable for Porsche. Covers the Porsche parts system, Porsche Tequipment, and finding parts at fair prices.

Audi Parts Guide

Audi A4 B9 OEM Brake Pads: Part Numbers and Guide

Find the correct genuine OEM brake pads for Audi A4 B9 (2015–2023). Includes front and rear part numbers, sensor guide, and replacement tips.

Mercedes-Benz Parts Guide

Mercedes W205 C-Class Wiper Blades: Genuine OEM Guide

Correct OEM wiper blade sizes and part numbers for Mercedes-Benz W205 C-Class. Flat blade vs conventional, replacement guide.

Volkswagen How-To

VW Golf Oil Filter Change: The OEM Guide

Complete step-by-step guide for VW Golf oil filter replacement using genuine OEM parts. Covers Mk5, Mk6, Mk7, and Mk8 with part numbers.

BMW How-To

BMW Cabin Air Filter Replacement: Complete DIY Guide

Step-by-step instructions for replacing the cabin air filter (microfilter/pollen filter) on BMW 3 Series, 5 Series, and X models.

BMW How-To

How to Read a BMW Part Number

Decode any BMW OEM part number. Understand the group codes, model prefixes, revision letters, and how to find superseded numbers.

Mercedes-Benz Parts Guide

Mercedes-Benz Air Filter: Genuine OEM vs Aftermarket

Why the air filter matters more on a Mercedes than you think. OEM vs aftermarket filtration comparison, part numbers, and replacement guide.

BMW Parts Guide

BMW Spark Plugs: OEM vs Aftermarket — What You Need to Know

The definitive guide to BMW spark plug specifications. Why iridium OEM plugs matter, heat ranges, part numbers, and replacement intervals.