Replacing the fuel pump on a Nissan Murano Z50: step-by-step instructions with nuances

Nissan Murano Z50 (first generation, 2003–2007) is a reliable crossover, but as it ages, its fuel system requires attention. The fuel pump here is one of the weak points: after a mileage of 150–200 thousand km, it begins to “mope”, and ignoring the symptoms leads to breakdown at the most inopportune moment. In this article, we will look at how to independently diagnose a malfunction, select a high-quality pump and replace it without the mistakes that 90% of beginners make.

Feature Murano Z50 — integrated fuel module (pump + level sensor + filter mesh), which can be changed entirely. This simplifies the process, but requires caution: incorrect installation or choosing a cheap analogue will lead to repeated repairs after 20–30 thousand km. We have collected data from manuals, service technicians’ experience and owner reports so that you can avoid typical “rake”.

Signs of a faulty fuel pump: when is it time to change it

Symptoms of a “dying” pump on Murano Z50 Often confused with problems with spark plugs, ignition coils or throttle body. Here key features, which directly point to the fuel module:

• 🔴 Jerking while walking when you press the gas sharply (especially at a speed of 60–90 km/h), the pump does not have time to supply fuel.
• 🔴 Long startup (the starter turns for 3-5 seconds before setting) - the pressure in the system drops due to wear of the pump membrane.
• 🔴 Power Loss on climbs or when overtaking, although the speed increases - fuel starvation.
• 🔴 Noise from the gas tank (especially when hot) - the pump bearings are worn out.
• 🔴 Check Engine with codes P0171 (lean mixture) or P0174 - an indirect sign of low fuel pressure.

If at least 2-3 items from the list are about your Murano, diagnose the pump to complete refusal. On Z50 with motor VQ35DE (3.5 l), a critical drop in fuel pressure leads to detonation and damage to the catalysts - repairs will cost 3–5 times more than replacing the pump.

⚠️ Attention: On Murano Z50 with a mileage of >200 thousand km, replacing only the pump (without a mesh filter) is pointless - dirt from the tank will quickly clog the new unit. Change the entire module!

Which fuel pump to choose: original vs analogues

Original fuel module for Nissan Murano Z50 has an article number 17040-4M000 (or 17040-4M00A for restyled models 2005–2007). Its average price is 12–15 thousand rubles. But there are proven analogues that are not inferior in terms of resource:

Brand	Article	Price, ₽	Features
Denso	950-0101	8 500–10 000	OEM supplier for Nissan, resource 150+ thousand km
Bosch	0 580 454 036	7 000–8 500	Good performance but fuel sensitive
Airtex	E2300M	6 000–7 500	Budget option, suitable for temporary replacement
Carter	P74059M	9 000–11 000	Improved filtration, recommended for regions with poor gasoline

Avoid cheap Chinese pumps (eg. Febi or JP Group) - their resource rarely exceeds 30–50 thousand km. When choosing, pay attention to pump pressure: for VQ35DE it must be 3.8–4.2 bar (measured at the module output). Lower values ​​will lead to problems with starting and dynamics.

Tools and preparation: what you need for replacement

To work you will need:

• 🔧 A set of heads and collars (especially the head on 10 mm for mounting the module).
• 🔧 Screwdriver with a flat blade (for prying off the fasteners).
• 🔧 Pliers or puller for fuel hoses.
• 🔧 Rags and vacuum cleaner (to clean the tank from dirt).
• 🔧 Fire extinguisher (required! Gasoline in the tank is a source of fire).
• 🔧 New fuel module + tank o-ring (17352-4M000).

Before starting work:

1. Disable negative battery terminal (to avoid sparks).
2. Relieve pressure in the fuel system: remove the fuel pump fuse (F/Pump 15A in the block under the hood) and start the engine - it will stall in 10–15 seconds.
3. Empty the tank to the level less than 1/4 (this makes it easier to remove the module).

Relieve pressure in the system|Disconnect the battery|Clean the area around the tank flap|Prepare a fire extinguisher|Check for a new O-ring-->

⚠️ Attention: On Murano Z50 the fuel module is attached to the tank 8 10mm socket head bolts. If at least one bolt breaks, you will have to remove the tank completely - that’s +3–4 hours of work!

Step-by-step instructions for replacing the fuel pump

Work is carried out on an inspection pit or a lift. If they are not there, lift the rear of the car with a jack (use supports!).

Step 1. Dismantling the old module

1. Remove the rear seat (pull up firmly - it is secured with latches).
2. Under the mat, find the fuel tank hatch (round, diameter ~20 cm). Unscrew the 4 screws with a Phillips screwdriver.
3. Clean the surface of the tank from dirt with a vacuum cleaner (debris getting into the tank = clogged filter).
4. Disconnect electrical connector (press the lock and pull up).
5. Squeeze the plastic fuel hose clamps with pliers and remove them. Be prepared for gasoline leaks!
6. Unscrew the 8 bolts securing the module with the head on 10 mm (don't lose the o-ring!).
7. Carefully remove the module by tilting it at an angle of 45° (so as not to bend the level sensor float).

Step 2: Installing a new module

1. Compare the new and old modules - check the length of the float, the location of the connectors and the markings.
2. Install new o-ring onto the tank (the old one gets dull and leaks).
3. Lower the new module into the tank, aligning the mounting grooves. Tighten the bolts criss-cross (so as not to skew).
4. Connect the fuel hoses until the clips click. Check if they are twisted.
5. Connect the electrical connector.
6. Reinstall the hatch and seat.

Step 3. Check functionality

1. Connect the battery and turn on the ignition (without starting the engine) for 5 seconds - the pump should hum.
2. Start the engine. If it stalls, check the fuel pressure with a pressure gauge (normal: 3.8–4.2 bar).
3. Check the tightness: inspect the installation site of the module for gasoline leaks.

Typical replacement mistakes and how to avoid them

Even experienced craftsmen make mistakes that lead to repeated repairs. Here TOP-5 misses on Murano Z50:

• 🚫 Using an old O-ring → gasoline leak and smell in the cabin. Always change the ring (17352-4M000).
• 🚫 Module misalignment during installation → the pump jams or is noisy. Tighten the bolts crosswise.
• 🚫 Dirt getting into the tank → rapid wear of the new pump. Vacuum the tank before work!
• 🚫 Failure to comply with connector polarity → the pump does not pump. On Murano Z50 The connector with the key is impossible to confuse.
• 🚫 Forgot to relieve pressure → a fountain of gasoline when the hoses are disconnected. Always remove the fuse!

Another common problem is wrong pump selection. For example, Bosch 0 580 454 036 Fits in size, but its performance is 10% lower than the original. This leads to “dullness” at high speeds. If you drive aggressively, take it Denso or Carter.

What to do if after replacement the pump does not pump?

1. Check the fuse F/Pump 15A — it could burn out when connected.

2. Inspect the pump connector for oxidation (clean the contacts with WD-40).

3. Make sure that +12V is supplied to the pump when the ignition is turned on (call with a tester).

4. If the pump hums but does not pump, check the check valve (it may be stuck).

How much does it cost to replace a fuel pump at a service center?

The cost of work in car services varies depending on the region and level of the service station:

Service type	Price of work, ₽	Time, h	What's included
Official dealer	8 000–12 000	2–3	Diagnostics + replacement + pressure check
Specialized service (Nissan)	5 000–7 000	1.5–2	Module replacement + error reset
Garage/private master	3 000–4 500	1–1.5	Replacement only (no diagnostics)

Self-replacement will only cost the cost of spare parts (7-15 thousand rubles), but will require 3-5 hours of time and accuracy. If you are not confident in your abilities, contact professionals who specialize in Nissan. They know the nuances Murano Z50, for example, how to properly disconnect stuck hoses without damaging them.

Frequently asked questions about replacing the fuel pump on a Nissan Murano Z50

Is it possible to drive with a faulty fuel pump?

Short term - yes, but not worth the risk. On Murano Z50 a worn pump leads to:

• Overheating and engine detonation (risk of damage to the pistons).
• Clogging of injectors (cleaning them will cost 5–8 thousand rubles).
• Sudden engine stop on the highway.

If the pump is already dying, replace it within 1-2 weeks.

How to check fuel pressure without a pressure gauge?

Indirect method:

1. Unscrew the cap on the fuel rail (to the right of the intake manifold).
2. Press the spool with a screwdriver - gasoline should spray out under pressure.
3. If the stream is weak or absent, the pump is faulty.

The exact pressure can only be measured with a pressure gauge (renting from a car service costs ~500 ₽).

What is the difference between the pump for Murano Z50 and Z51?

Modules not interchangeable:

• Z50 (2003–2007) - article 17040-4M000, pressure 3.8–4.2 bar.
• Z51 (2009–2015) - article 17040-4M010, pressure 4.5–5.0 bar.

Pump installation from Z51 on Z50 will lead to over-enrichment of the mixture and an error P0172.

Do I need to flush the tank when replacing the pump?

Required if:

• Vehicle mileage >200 thousand km.
• There was water or fuel of questionable quality in the tank.
• The old pump was clogged with dirt (visible during dismantling).

For cleaning, use special cleaners (for example, Liqui Moly Tank Reiniger) or diesel fuel (fill in 5 liters, shake the tank, drain).

Can an old pump be repaired?

Theoretically, yes - you can replace the brushes or bearings, but in practice this is:

• Class for professionals (special tools required).
• The service life after repair is 20–30 thousand km (it’s easier to buy a new one).
• Risk of repeated failure on the road.

Exception - replacement mesh filter only (article 16400-4M000), if the pump itself is working.