Can You Put Q50 Suspension Parts on a G37? A Complete Compatibility Guide

If you own an Infiniti G37 and are looking for suspension upgrades, you may have wondered whether parts from the newer Q50 will bolt on. The Q50 shares the same FM (Front-Midship) platform as the G37, but there are key differences that affect suspension compatibility. This guide breaks down which Q50 suspension components can be swapped onto a G37, what modifications may be needed, and what to watch out for.

Understanding the Platform: G37 vs. Q50

Both the Infiniti G37 (2008–2013) and the Q50 (2014–present) are built on Nissan’s FM platform, which also underpins the Nissan 370Z and earlier G35. This means the basic suspension architecture—MacPherson strut front, multilink rear—is similar. However, the Q50 introduced electric power steering, revised geometry, and different mounting points for some components.

Key Differences That Affect Swapping

• Steering system: G37 uses hydraulic power steering; Q50 uses electric (EPS). This affects the front knuckle and tie rod design.
• Subframe: The front subframe is similar but not identical. Rear subframe is different on later Q50s.
• Spring rates and dampers: Q50 parts are tuned for a heavier, more luxurious ride.
• Bushings and hardware: Some bolt sizes and alignment specs changed.

Front Suspension Compatibility

Struts and Shocks

Q50 front struts physically bolt into the G37’s upper mount and lower knuckle, but there are caveats. The Q50 strut is designed for electric power steering, so the mounting tab for the steering rack (or the EPS unit) may be positioned differently. In many cases, you can use Q50 struts on a G37 if you also swap the front knuckle and tie rod ends to match. However, this is not a direct bolt-on for the strut alone.

Verdict: Not directly interchangeable without additional changes.

Springs and Coilovers

Aftermarket coilovers for the G37 are often listed as compatible with the Q50 (and vice versa), but OEM springs are not interchangeable due to different spring rates and perch heights. If you’re looking for lowering springs, stick to G37-specific kits. For coilovers, many brands offer the same part number for both cars, but confirm with the manufacturer.

Verdict: Aftermarket coilovers often work; OEM springs do not.

Control Arms

Front upper control arms are generally the same between G37 and Q50. Lower control arms differ because of the steering system—Q50 lower arms have a different ball joint angle to accommodate EPS. Swapping lower control arms would require changing the knuckle as well.

Verdict: Upper arms swap easily; lower arms need knuckle swap.

Sway Bars

Front sway bars are compatible between G37 and Q50 (non-Sport vs. Sport trims). The end link mounting points are the same. Rear sway bars also swap, but the Q50 Sport bar is thicker and may improve handling. Use G37 end links or the Q50 ones if they match.

Verdict: Sway bars are direct bolt-on, bar ring differences.

Knuckles and Hubs

Q50 front knuckles are different due to EPS; they house the electric motor and have different steering arm geometry. Swapping full knuckles onto a G37 is not recommended unless you plan to convert to electric power steering (which is complex). Rear knuckles and hubs are nearly identical and can be swapped as a whole assembly.

Verdict: Front knuckles not compatible; rear knuckles can work.

Rear Suspension Compatibility

Shocks and Springs

Rear shocks from a Q50 will fit a G37, but the damping rate and length may differ. G37 rear shocks have a separate spring perch; Q50 rear shocks are often coilover-style on Sport models. You can use Q50 rear shocks if you also use the corresponding springs. Check that the lower mount bolt size matches.

Verdict: Possible with spring matching.

Control Arms and Links

Rear upper and lower control arms are similar, but the Q50 uses different bushings and some arms are longer or shorter due to revised geometry. The camber and toe arms are adjustable on both, but Q50 parts may not align correctly. Stick with G37-specific arms for alignment precision.

Verdict: Not recommended—stick with G37 arms.

Subframe

While the G37 and early Q50 (2014–2015) rear subframes can be swapped as a unit, later Q50 subframes have different mounting points and bushing locations. If you want to upgrade to the Q50’s rigid rear subframe bushings, you can press them into the G37 subframe. Full subframe swap is possible but requires cutting and welding.

Verdict: Bushings upgrade possible; subframe swap is advanced.

What About Brakes and Steering?

Though not strictly suspension, brakes and steering interact with the suspension system. Q50 brakes (calipers, rotors) can be swapped onto a G37 with the correct adapter brackets (e.g., Q50 Sport calipers on G37 require the Q50 knuckle or aftermarket brackets). Steering rack is not directly swappable because of different power assist types.

Practical Considerations

• Cost vs. Benefit: Q50 parts are often available used at low prices, but the needed additional parts (knuckles, hardware) may offset the savings.
• Ride Quality: Q50 suspension is softer and more comfort-oriented. G37 owners looking for sportier handling may not like the result.
• Alignment: After swapping multiple components, you must get a professional alignment. The Q50 specs are different; you’ll need G37 alignment settings.

Final Recommendation

For most G37 owners, the best approach is to stick with G37-specific suspension parts for a predictable, safe upgrade. If you want to experiment, the most straightforward Q50 swap is the front sway bar and rear shocks (with correct springs). Avoid mixing control arms and knuckles unless you’re prepared for a complex project. Aftermarket parts designed for the G37 are still the easiest and most reliable path to improved handling.

To summarize:

• Direct bolt-on: Front sway bar, rear shocks (with matching G37 springs), rear knuckle assembly.
• With minor modification: Rear subframe bushings, coilovers (aftermarket).
• Not recommended: Front struts, front lower control arms, rear control arms, full subframe swap.

Always verify part numbers and consult online forums for your specific model year. Swapping suspension parts between these platforms is possible but requires careful planning. For a hassle-free build, choose G37-specific components tailored to your driving goals.