Which Infiniti Nissan Car Parts Are Shared

I remember standing in the auto parts store, staring at a control arm for my old Infiniti G35. The price tag made me wince. Then, the guy behind the counter mentioned something that changed the game for me. "You know," he said, "that's the same part as on a 350Z, but the one in the Nissan box is seventy-five bucks cheaper."

That was my lightbulb moment. The discovery wasn't just about saving money; it was about understanding the smart, hidden engineering relationship between two brands I loved. The key is realizing that under the luxurious Infiniti skin often lies the robust, proven heart of a Nissan.

This deep dive is my promise to you. We'll cut through the confusion and brand marketing to give you the clear, actionable knowledge you need. You'll learn exactly which parts are shared, why they're shared, and how you can use this information to save significant money and time on your next repair or upgrade.

The Infiniti-Nissan Connection: A Tale of Two Brands

First, let's get the "why" out of the way. It's not a secret; it's smart business. Infiniti is Nissan's luxury division, much like Lexus is to Toyota or Acura is to Honda. They exist under the same corporate umbrella, the Renault-Nissan-Mitsubishi Alliance.

To maximize efficiency and reduce development costs, automakers build multiple vehicles on a shared "platform." A platform is like a car's skeleton—it includes the chassis, powertrain layout, and key structural components. By using the same platform for a Nissan and an Infiniti, they can share a huge number of expensive, unseen parts.

This is fantastic news for owners. It means you often have access to a wider, more affordable parts pool than you think. You just need to know where to look.

Platform Sharing: The Rosetta Stone of Part Swapping

The single most important factor in determining parts compatibility is the platform. If a Nissan and an Infiniti model are built on the same platform, the chances of them sharing mechanical and electrical components are extremely high. Below is a breakdown of the most common shared platforms and the models built on them.

A Detailed Breakdown of Shared Parts by Category

Now, let's get into the specifics. While not every part is a direct swap, a surprising number of them are. Here's a look at what you can typically interchange, what you might be able to, and what you should almost never expect to fit.

Engines & Drivetrain: The Heart of the Matter

This is where the most significant sharing occurs. Nissan's VQ and VK engine series are legendary for their performance and reliability, and they are the heartbeats of many Infiniti vehicles.

• VQ Series Engines: The VQ35DE, VQ35HR, and VQ37VHR are prime examples. The engine block, heads, and internal components are often identical between a Nissan 350Z/370Z and an Infiniti G35/G37. Small differences might exist in intake manifolds or engine tuning (ECU), but the core long block is the same.
• Transmissions: Both automatic and manual transmissions are frequently shared. For example, the 6-speed manual found in a G37 is mechanically the same as the one in a 370Z.
• Differentials & Axles: Especially on rear-wheel-drive FM platform cars, the differential housing and internal gears are often interchangeable, making it a popular swap for those looking for different gear ratios.

Suspension, Brakes, and Chassis

The "bones" of the cars are another area ripe for parts sharing. This is fantastic for both repairs and performance upgrades, as you can sometimes get Nismo (Nissan's performance brand) parts to fit your Infiniti.

Key shared components include:

1. Control Arms & Bushings: Front and rear control arms are almost always direct swaps on platform mates.
2. Shock Absorbers & Springs: While the valving and spring rates might be slightly different to give Infiniti a "plusher" ride, the physical mounting points are typically identical. An aftermarket coilover kit for a 370Z will bolt right onto a G37.
3. Brake Calipers & Rotors: The popular Akebono big brake kits found on sport-package Infinitis are the same as those on Nismo 370Z models. This means pads and rotors are interchangeable.
4. Wheel Hubs & Bearings: These are wear-and-tear items that are almost universally shared across a platform.

Electrical Systems & Sensors

This category can be a bit more nuanced, but many fundamental components are shared. The key is to match part numbers exactly.

• Sensors: Mass Airflow (MAF) sensors, O2 sensors, camshaft/crankshaft position sensors, and ABS wheel speed sensors are often identical.
• Alternators & Starters: These core electrical components are based on the engine they're attached to, so a VQ37VHR starter is the same whether it's in a Q50 or a 370Z.
• ECUs & Modules: Use caution here. While the physical Engine Control Unit (ECU) might be the same hardware, it will have different software flashed onto it for the specific model, trim, and transmission. Swapping them is not a plug-and-play affair and often requires specialized programming.

What Is (Almost) Never Shared?

To avoid costly mistakes, it's just as important to know what doesn't swap over. This is where the brands work hard to differentiate themselves.

Your Smart-Sourcing Checklist: How to Verify Part Compatibility

Feeling empowered? Good. Now, let's turn that knowledge into a foolproof process. Before you click "buy" on any part, run through these steps to guarantee it's the right fit.

1. Confirm Your Platform: Use the table above or a quick search like "2018 Infiniti QX60 platform" to identify your car's foundational architecture. This is your starting point.
2. Find the OEM Part Number: This is the golden rule. The Original Equipment Manufacturer (OEM) part number is the ultimate truth. You can often find it by searching online OEM parts catalogs (like NissanPartsDeal or InfinitiPartsUSA) with your VIN.
3. Cross-Reference Part Numbers: Once you have the Infiniti part number, search for it. You'll often find it listed as a compatible part for a Nissan model. Conversely, if you have a Nissan part, search its number to see if it cross-references with the equivalent Infiniti part.
4. Consult the Community: Enthusiast forums (like MyG37, The370Z, or NicoClub) are an invaluable resource. A quick search for "350Z control arm on G35" will yield years of real-world experiences from people who have already done the swap.
5. My Costly Mistake: I once bought a camshaft sensor for my G37 that was listed for a Maxima with the "same" engine. The part number was one digit off. The sensor fit, but the electrical connector was clocked differently and wouldn't plug in. I was stuck until I got the exact OEM cross-referenced part. Always double-check the full part number.

Frequently Asked Questions

Are Infiniti parts just more expensive Nissan parts?

Sometimes, yes. For mechanically identical parts, you are often paying for the Infiniti-branded box. However, for parts where there are minor differences in materials or tuning for a luxury feel (like specific suspension dampers or sound-deadening), the price difference can reflect a tangible, albeit small, change in the product.

Can I use a Nissan engine in my Infiniti?

Absolutely, provided it's from a compatible platform-mate. Swapping a VQ35DE from a Nissan 350Z into an Infiniti G35 is a very common and straightforward procedure because they are fundamentally the same vehicle underneath.

Will using a Nissan part on my Infiniti void the warranty?

This is a gray area. If the Nissan part is a 100% identical OEM component (same part number), it's very unlikely to cause an issue. However, if a non-equivalent Nissan part fails and causes damage to other components, a dealer could deny the warranty claim on that specific failure. For cars under warranty, it's safest to use the official, brand-specific part number.

Which Infiniti and Nissan models share the most parts?

The undisputed champions of part sharing are the Nissan 350Z/370Z and the Infiniti G35/G37/Q60. Built on the Nissan FM platform, they share a massive number of drivetrain, suspension, and braking components, making them a dream for tuners and DIY mechanics.