Removing the starter on a Nissan Terrano: instructions with nuances for the R50 and R51

Removing the starter Nissan Terrano - a task that every owner of this crossover faces sooner or later. A faulty starter manifests itself with a characteristic crackling sound, slow rotation of the crankshaft, or complete failure when turning the key. Unlike many modern cars, where access to the unit is difficult, Terrano (especially models R50 And R51) provides relatively convenient conditions for self-repair.

However, even here there are pitfalls: from non-obvious fastenings to the risk of damaging neighboring parts. This article will help you figure out how to properly dismantle the starter without consequences, what tools you will need, and what to pay attention to when reassembling it. We took into account the experience of auto electricians and typical mistakes of beginners so that your repair goes smoothly.

Signs of a starter malfunction on a Nissan Terrano

Before you take the tools, make sure that the problem is in the starter. On Terrano symptoms are often disguised as a dead battery or a fault in the power circuit. Here are the key signs that will indicate the need to remove the knot:

• 🔋 Clicks without rotation: When you turn the key, rhythmic clicks of the retractor relay are heard, but the crankshaft does not turn. This may indicate worn brushes or burnt contacts.
• 🐢 Slow rotation: the engine starts, but the starter turns with noticeable effort, especially when cold. A common cause is worn bushings or bearings.
• 🔥 Burning smell: after several attempts to start, a characteristic smell of burnt insulation can be heard from under the hood. This is a signal about a short circuit in the windings.
• 🔄 The starter does not turn off: After starting the engine, the starter continues to rotate, making a grinding noise. The culprit is a stuck solenoid relay.

If at least one of these symptoms appears regularly, dismantling and diagnosing the starter is inevitable. On Nissan Terrano with diesel engines (K9K) and gasoline (MR20DE) the removal process has nuances, but the general scheme remains similar.

⚠️ Attention: On models with automatic transmission, before removing the starter, be sure to remove the negative terminal from the battery! Otherwise, you risk burning the electronic transmission control unit if it accidentally closes.

Tools and materials for work

To dismantle the starter Terrano You don’t need a specialized tool, but you can’t do without some keys and accessories. Here's a complete list of what you'll need:

Tool/material	Purpose	Note
10 mm head	Unscrewing the starter fasteners	It is better to use an extended head
12 mm socket wrench	Removing the Power Terminals	An insulated tool is required!
Head extension	Access to the upper starter bolt	Minimum length - 10 cm
Ratchet handle	Ease of working in cramped conditions	Preferably with a flexible adapter
Medical syringe + WD-40	Cleaning Contacts and Threads	Apply WD-40 10–15 minutes before work

Prepare additionally marker for marking wires and plastic ties — they will help fix the tourniquets and prevent them from getting into the work area. If you are planning to replace the starter, check the compatibility of the new part: for Terrano R50 (2014–2017) and R51 (2017–present) starters with article numbers are suitable 23300-JK00A or 23300-JK00B (depending on the engine).

Preparatory work before removal

Improper preparation can result in lost time or damaged parts. Follow this algorithm to avoid common mistakes:

1. Disconnect the battery. First remove the minus terminal, then the plus terminal. This will prevent a short circuit when operating with starter power.
2. Clean the work area. Remove dirt and oil from the surface of the starter and surrounding parts. Dust that gets into a disassembled unit reduces its service life.
3. Take a photo of the wire location. On Terrano 2-3 wires go to the starter: a thick “plus”, a thin control and (sometimes) ground. Marking will help avoid confusion during reassembly.
4. Check the accessibility of fasteners. On diesel versions, the upper starter bolt may be covered by the intercooler pipe - it will have to be temporarily removed.

On petrol Terranos with the MR20DE engine, before removing the starter, you must disconnect the crankshaft position sensor (CPS) connector. It is located nearby and may interfere with dismantling. Do not pull on the wires - only on the plastic connector housing!

Step-by-step instructions for removing the starter

The process of dismantling the starter Nissan Terrano takes from 30 to 60 minutes depending on experience. The main thing is not to rush and follow the sequence. Let's look at the algorithm using an example Terrano R51 with gasoline engine MR20DE:

Step 1: Disconnecting Wires

Let's start with the electrical part. The starter fits:

• 🔌 Thick red wire — main power supply from the battery (terminal “30”).
• 📡 Thin wire — control signal from the ignition switch (terminal “50”).
• 🖤 Black wire (if any) - ground, attached to the starter housing.

First, disconnect the control wire (thin), then the main “plus”. To do this, loosen the nut with a 12 mm wrench. Do not pull on the wires - only on the metal terminals!

Step 2: Removing the fasteners

Starter on Terrano attached to the cylinder block two or three bolts (depending on the year of manufacture). Their location:

• 🔧 Bottom bolt — accessible from the outside, 10 mm head.
• 🔧 Top bolt - hidden behind the intake manifold, you will need an extension cord.
• 🔧 Side bolt (if any) - on models after 2018, 12 mm head.

Unscrew the bolts in a bottom-to-top order to prevent the starter from falling after the last fastening is loosened. On diesel versions, the top bolt may be covered by the turbine bracket - it will have to be temporarily removed.

Step 3: Removing the Starter

After removing all fasteners, carefully pull the starter towards you. It may “stick” due to corrosion or sealing rubber. Don't use force - swing the knot left and right while pulling back. If the starter does not budge, check whether you forgot to unscrew one of the bolts.

On Terrano with automatic transmission, when removing the starter, keep an eye on torque converter - it is located nearby and can be damaged by careless movement.

What to do if the starter cannot be removed?

If the starter is stuck to the cylinder block, use a penetrating lubricant (for example, Liqui Moly LM-40) and a wooden spacer for neat tearing. Never hit the housing with a metal hammer - this may damage the magnets inside the starter.

Common mistakes and how to avoid them

Even experienced craftsmen sometimes make mistakes when working with the starter. Nissan Terrano. Here are the most common mistakes and how to prevent them:

⚠️ Attention: On diesel Terrano (engine K9K) when reinstalling the starter, they often forget to connect the fuel pressure sensor connector, which is located nearby. This results in an error P0190 and problems with starting!

• ⚡ Short circuit: When the positive terminal is disconnected, accidentally touching the starter housing with the key causes a spark. Solution: Always remove the negative cable from the battery first and use an insulated tool.
• 🔩 Broken thread: The starter mounting bolts often stick. Solution: Before unscrewing, treat the thread WD-40 and let stand for 10-15 minutes.
• 🔌 Mixed up wires: Connecting the control wire in place of the power wire leads to burnout of the contacts. Solution: Mark the wires with a marker or take a photo of the original position.
• 🛠️ Flywheel damage: If the starter is not carefully removed, the bendix may catch the flywheel teeth. Solution: before removing, turn the crankshaft by the pulley bolt so that the teeth of the bendix and flywheel do not coincide.

Another common problem is incomplete tightening of bolts when reinstalling. This leads to vibrations and premature wear of the starter. Tighten fasteners firmly 25–30 Nm (for M8 bolts).

Diagnostics of a removed starter

Before buying a new starter, make sure that the old one is really faulty. Here's how to check it without a special stand:

Checking the solenoid relay

Connect the “plus” of the battery to the relay terminal, and the “minus” to the starter housing. A working relay will make a clear click and the bendix will move forward. If there is no click or the bendix does not move, the relay must be replaced.

Checking the electric motor

Apply 12V voltage directly to the starter terminals (bypassing the relay). A healthy motor will spin at high speed. If the rotation is slow or accompanied by creaking, the brushes or bearings are worn out.

Bendix check

Try turning the bendix in both directions. It should only rotate in one direction (clockwise when viewed from the flywheel). If it rotates in both directions, the overrunning clutch needs to be replaced.

Symptom	Probable Cause	Solution
Clicks without rotation	Defective solenoid relay	Replacing a relay or starter
Slow rotation	Worn brushes or bearings	Starter repair or replacement
Grinding noise on startup	Worn bendix teeth or flywheel	Replacing the bendix or flywheel
The starter does not turn off	Relay or bendix sticking	Replacing a relay or starter

If the starter passes all tests, the problem may lie in wiring or ignition switch. Check the voltage on the control wire (terminal “50”) when turning the key - it should be at least 9V.

Starter installation and final assembly

Reinstalling the starter to Nissan Terrano requires no less care than dismantling. Follow these guidelines:

1. Clean the seat. Remove dirt and old gasket residue (if there was one) from the cylinder block. Use a plastic scraper to avoid damaging the surface.
2. Check Bendix. Before installation, make sure that it is recessed and does not block the rotation of the flywheel. To do this, lightly tap the starter housing with the wooden handle of a hammer.
3. Install the starter. Slide it onto the guide pins and tighten the bolts crosswise to avoid distortion. Tightening torque - 25–30 Nm.
4. Connect the wires. First fasten the control wire (thin), then the power “plus”. Make sure the terminals are tight.
5. Check launch. Connect the battery and try to start the engine. If the starter is difficult to rotate, check the clearances and fastenings.

On Terrano with diesel engines, after installing the starter, it may be necessary reset adaptations throttle valve. To do this:

1. Turn on the ignition (without starting the engine).
2. Wait 10 seconds.
3. Turn off the ignition.
4. Repeat the procedure 2-3 times.

FAQ: Frequently asked questions about removing the starter on a Nissan Terrano

Is it possible to remove the starter on a Terrano without a pit or lift?

Yes, but it's much more complicated. On petrol versions (MR20DE) you can do without a pit if you remove the right front wheel and engine protection. On diesel (K9K) without a pit or overpass, dismantling is extremely inconvenient due to the upper mounting bolt.

Which starter is better to choose for replacement: original or analogue?

Original starters Nissan (articles 23300-JK00A/B) are reliable, but expensive (from 12,000 ₽). Good analogues:

• Bosch 0 001 108 005 (for petrol engines)
• Valeo 438083 (for diesel engines)
• Denso 280-0001 (universal version)

When choosing an analogue, pay attention to power (at least 1.2 kW) and direction of rotation (for Terrano - clockwise).

What should I do if the car does not start after replacing the starter?

There are several reasons:

1. Unconnected wires: Check the control wire (terminal “50”) and ground.
2. Low battery: The starter may have drained the battery after repeated starting attempts.
3. Immobilizer lock: on Terrano After removing the battery terminals, the protection may be triggered. Try to “train” the key (insert it into the lock, turn on the ignition for 10 minutes).
4. Flywheel damaged: If the bendix of the new starter does not engage, check the flywheel teeth for wear.

How long does it take to replace a starter on a Terrano?

Time depends on experience and engine type:

• Gasoline MR20DE: 40–60 minutes (without pit - up to 90 minutes).
• Diesel K9K: 1–1.5 hours due to difficult access to the top bolt.

In a car service, the work will cost 1,500–3,000 rubles (excluding the cost of parts).

Can the Terrano starter be repaired or is it just a replacement?

Repair is possible if the following are faulty:

• Brushes or bushings (repair cost - 1,500–2,500 ₽).
• Solenoid relay (replacement will cost 800–1,200 ₽).
• Bendix (a new one will cost 600–900 rubles).

If the winding is burned out or the housing is damaged, repairs are not cost-effective - it is cheaper to buy a new starter. For diagnostics, contact an auto electrician with winding testing equipment.