Infiniti Q50 Won't Start Clicking Noise?

An Infiniti Q50 that won’t start and only makes a clicking noise usually has low battery power, a loose cable connection, or a starter/relay problem.

A single click, rapid clicking, or a dull clack can all point to different faults. The good news is you can narrow it down in minutes with a few checks you can do in your driveway.

This guide walks you from the simplest causes to the ones that take tools. You’ll know what to try, what to measure, and when to stop so you don’t cook a cable or drain the battery flat.

What A Clicking Noise Means On A Q50

Most “clicking but no start” complaints come from the starter not getting enough current. When voltage drops under load, the starter solenoid may chatter or snap once without spinning the engine.

Clicks can also come from relays under the hood, the brake switch, or the starter solenoid engaging and releasing. Paying attention to the sound and the dash behavior saves time.

Match The Sound To A Likely Area

What You Hear Or See	Most Likely Cause	First Thing To Do
Rapid clicking, lights dim hard	Weak battery or bad connection	Measure battery voltage, then clean and tighten terminals
One solid click, lights stay bright	Starter, relay, or solenoid issue	Try a start in Neutral, then test the starter signal
Clicking from fuse box area	Relay chatter from low voltage	Jump start or charge battery before deeper tests
No crank, dash shows a fob warning	Fob battery low or start authorization blocked	Press Start with the fob, then replace the fob battery

Infiniti Q50 Won’t Start Clicking Noise?

If your infiniti q50 won’t start clicking noise? shows up right after you press Start, run these checks in order. They’re quick, they’re safe, and they rule out the most common failures.

Confirm the shifter position — Hold the brake, move to Neutral, then try starting again.
Watch the dash and headlights — If lights sag hard during the click, treat it as a power delivery issue.
Try a jump start — If it cranks right away with a jump, the battery, cables, or charging system is the path.
Listen for the starter area — A click from low on the engine bay near the bellhousing points toward the starter circuit.
Stop after three tries — Repeated attempts can heat cables and drain the battery to the point where testing gets messy.

If the car starts after a jump, don’t call it “fixed” yet. A weak battery can come back a day later, and a loose terminal can mimic a dead starter.

Battery And Cable Checks That Solve Most Click-No-Start Cases

On the Q50, a battery that shows decent voltage at rest can still fail under load. Cold weather, short trips, and age all cut cranking capacity.

You don’t need a fancy tester to start. A basic multimeter and a close check of the terminals will catch a lot.

Check Battery Voltage The Simple Way

Measure resting voltage — With the car off for 20 minutes, aim for about 12.6 V on a healthy, fully charged battery.
Measure while you press Start — If voltage drops near 9–10 V and you only get clicking, the battery can’t supply cranking current.
Compare after a jump — If it starts with a jump and voltage climbs into the mid-13s to 14s while running, the alternator may be charging.

Check Charging After It Starts

If the Q50 starts with a jump, let it run and verify the charging voltage at the battery. A weak alternator can leave you with clicks again after the next stop.

Measure at idle — With the engine running, many cars sit around 13.5–14.7 V at the battery.
Turn on headlights and rear defrost — Voltage should stay steady instead of sliding down toward 12 V.
Listen for belt squeal — A slipping belt can cut alternator output and mimic a dead battery.

If voltage stays low, recharge the battery, then retest later.

Numbers shift with temperature and battery type. Treat the “during start” drop as the clue that matters most.

Clean, Tighten, And Check The Ground Path

Inspect the battery posts — White crust, green tint, or oily grime raises resistance and kills current flow.
Tighten the clamps — A clamp that twists by hand can click all day and never crank.
Check the negative ground point — Follow the black cable to the body/engine ground and make sure it’s snug and clean.
Look for heat marks — Melted plastic, a hot smell, or shiny scorch marks hint at high resistance.

If you remove cables, shut the car off, keep metal tools away from both terminals at once, and avoid letting a wrench bridge the positive post to the body.

Do A Quick Voltage-Drop Test

This is the fastest way to catch a cable that looks fine but fails under load.

Set the meter to DC volts — Use the 20 V range if your meter has ranges.
Test the positive side — Put one lead on the battery positive post and the other on the starter’s main power stud; crank and watch the reading.
Test the ground side — Put one lead on the starter case and the other on the battery negative post; crank and watch the reading.

Lower is better. If you see a big jump on either side, the cable, terminal, or ground point has too much resistance.

Rule Out A Slow Drain Overnight

If the Q50 starts fine after a charge, then clicks again the next morning, you may be dealing with a drain. A trunk light that stays on, a phone charger, or an aftermarket amp can pull the battery down while the car sits.

Check interior and trunk lights — Close the car, wait a minute, then peek through a window for any glow.
Unplug add-on devices — Remove chargers, dash cams, and plug-in adapters for a night.
Feel for warm modules — After the car sits, a warm area near a module can hint it never went to sleep.

A proper draw test uses an ammeter in series and takes patience. If you suspect a drain and don’t have the tools, a shop can measure it without guessing.

Starter And Relay Faults That Still Let The Lights Stay Bright

If the lights stay bright and you only hear one click, the battery may be fine and the starter may not be turning. The click can be the solenoid trying to engage.

Before pulling parts, run a few checks that cost nothing.

Try Neutral Start And Brake Pedal Checks

Start in Neutral — If it cranks in Neutral but not in Park, the range switch or shifter linkage may be out of adjustment.
Press the brake firmly — The Q50 needs a brake signal to start; a weak switch can block the request.
Check brake lights — No brake lights can mean a fuse, switch, or wiring issue that stops cranking.

Check The Starter Relay And Fuse Basics

Find the starter relay — Use the fuse-box diagram on the fuse-box lid to find the starter relay position.
Swap with a matching relay — If another relay has the same part number, swap and retest.
Inspect the related fuse — A blown fuse means you should look for a short before replacing and trying again.

Relay swaps are a clue, not a final call. If a fuse keeps popping, stop and trace the circuit.

Know When The Starter Itself Is Suspect

Listen for a single heavy click — That can mean the solenoid engages but the motor won’t spin.
Check for slow crank first — A starter often gives warning as slower cranks before it quits.
Watch for intermittent starts — If it starts after a wait, heat soak or worn internal contacts can be in play.

If you’re under the hood with the engine hot, keep hands, sleeves, and tools clear of belts and fans. Let it cool if access is tight.

Fob, Security, And Control Issues That Mimic A Dead Starter

A Q50 can refuse to crank if it can’t validate the fob or if the start request never reaches the starter control side. In those cases, you may hear relay clicks without a crank.

Try The Fob Failsafe Method

Hold the fob to the Start button — Press the button with the fob, then hold the brake and press Start.
Replace the fob battery — A weak coin cell can cause warning messages and no-crank moments.
Use the spare fob — If the spare works, the first fob or its battery is the issue.

Check Common Power Feeds

Verify main fuses — Look for any blown high-amp fuses in the engine bay fuse box.
Scan for codes — A simple OBD-II scan can show stored faults tied to starting or power supply modules.
Review add-on wiring — Remote starters, alarms, and audio wiring can interrupt the start path.

If you see water in a fuse box, stop. Drying and cleaning may be needed before power returns, and corrosion can spread.

When It Starts Again, Keep It From Coming Back

Once you get it running, take ten minutes to cut the odds of a repeat. A clicking event can leave the battery low and the terminals warm.

Do A Short Post-Start Check

Let it idle for a minute — Watch for warning lights that point to a charging issue.
Turn off heavy loads — Shut down seat heaters, rear defrost, and audio so the alternator can refill the battery.
Drive long enough — A 20–30 minute drive restores more charge than a brief idle in a parking spot.

Battery Replacement And Charging Tips

Check battery age — Many batteries fade after 3–5 years, depending on heat and driving pattern.
Use a smart charger — Overnight charging is gentler than repeated jump starts.
Match the correct size — Use the group size and rating that fits the Q50 tray and hold-down.

A One-Page Checklist For Next Time

Note the click type — Rapid click with dim lights points to battery or cables; single click with bright lights points to the starter side.
Try Neutral start — A fast test for range switch quirks.
Jump start once — If it starts, plan a battery and cable inspection the same day.
Check brake lights — No brake lights can block the start request.
Use the fob-on-button trick — Rules out a weak fob battery in seconds.

If your infiniti q50 won’t start clicking noise? returns after cleaning terminals and charging the battery, the next step is testing starter signal and cable drop under load. At that point, a shop with a load tester can confirm the failing part without guesswork.