2014–2024 Infiniti Q50
By Tom Becker ✓ Certified Mechanic · Published Sep 21, 2026 · Updated Oct 22, 2026
Save $80 by doing it yourself! Shop cost: $100
Quick answer: Check Coolant Level on a 2014–2024 Infiniti Q50 is rated Easy and takes about 10–15 minutes. You'll need 2 tools for this job, and parts cost about $20. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name | Part Number | Price | Buy |
|---|---|---|---|
| Engine Coolant (50/50 mix) | 999MP-AF050P | $20.00 |
About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.
💡 Pro tip: Order all parts at once to save on shipping
Follow these steps carefully
First, know which procedure your Q50 uses. Models with the non-pressurized reservoir get checked with the engine cold; models with the pressurized reservoir — including many 2018-and-up cars — get checked with the engine running after it reaches normal operating temperature, per the owner's manual. Checking the wrong way gives you a meaningless reading.
Open the hood and find the engine coolant reservoir on the passenger side of the engine bay — the translucent plastic bottle with MIN and MAX marks on its side. Do not touch the radiator filler cap — the reservoir is all you need for a level check.
I find the passenger-side reservoir and read the MIN/MAX marks before adding anything — I've seen people top off the washer bottle by mistake on a crowded engine bay.
On 3.0T cars there is a second, separate reservoir for the intercooler circuit, and on hybrid models there is an inverter coolant reservoir — topping up the wrong one does nothing for the engine.
On a cold check it should sit between the marks; on a running-at-temperature check it should be at or near MAX.
If the level is below MIN, add only the Nissan/Infiniti-approved coolant your owner's manual specifies — the blue long-life formula — up to the MAX line, and never mix coolant types.
Tighten the reservoir cap securely — on pressurized-reservoir models the cap holds system pressure, and a loose cap causes slow coolant loss and overheating.
If you had to add coolant, watch the level over the next week of driving. Catching a weeping hose or radiator early is far cheaper than an overheated engine.
I check the level every morning for a week after topping off — I've caught weeping hoses this way, and a five-dollar hose beats an overheated engine every time.
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
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