When is it necessary to replace the starter? Nissan Primera P12?
The starter is a unit that rarely fails suddenly. Typically, its “death” is heralded by characteristic symptoms: clicking sounds without cranking the engine, slow rotation of the crankshaft, or a complete lack of response to turning the key. On Primera P12 (2002–2008) with engines QR20DE And QR25DE the starter is located in an inconvenient place - under the intake manifold, which makes access difficult. However, it is quite possible to remove it yourself if you know the sequence of actions and pitfalls.
Main reasons for dismantling: 1) Wear of brushes or bushings - the starter turns “sluggishly” or intermittently. 2) Short circuit of the armature windings - a burning smell is heard, smoke is possible. 3) Bendix failure - a metallic grinding noise is heard when starting. 4) Mechanical damage (for example, after an accident or unsuccessful repair).
Before you rush to remove the starter, make sure that the problem is not low battery, oxidized terminals or faulty ignition switch.
Preparation: tools and working conditions
To remove the starter Primera P12 you will need:
- 🔧 A set of sockets and extensions (required) 14 mm head for attaching the starter).
- 🔧 A ratchet wrench or a wrench with a cardan - without them it will be extremely difficult to reach the bolts.
- 🔧 Flat blade screwdriver (for disconnecting terminals).
- 🔧 Jack and stops (if you work from under the car).
- 🔧 Flashlight or carrier - lighting under the hood Primera P12 leaves much to be desired.
- 🔧 Marker or electrical tape - to mark the wires before disconnecting.
Important: it is better to carry out the work on cooled engine - this way you will avoid burns and deformation of plastic elements. If the starter is being removed for the first time, prepare in advance photo or video of the process - this will help not to mix up the wires during reassembly. It will not be superfluous contact cleaner (For example, WD-40), since the terminals often oxidize.
- In the garage
- On the street
- At the service station
- Houses in the yard
Step-by-step instructions: how to remove the starter from Nissan Primera P12
The dismantling process takes 1.5–3 hours depending on experience. The main difficulty is access to the lower mounting bolt. Let's consider the algorithm in stages:
Step 1: Disconnect Battery and Prepare
First of all disconnect the negative terminal of the battery - this will prevent a short circuit. Next:
- Remove air filter (unscrew the 4 cover bolts and loosen the pipe clamp).
- Disconnect connector for mass air flow sensor (MAF).
- Remove inlet pipe (unscrew the 2 bolts and carefully move it to the side).
Step 2: Access the Starter
Now the starter is visible, but reaching the bolts is still problematic. You will need:
- 🔧 Unscrew upper mounting bolt (14 mm head). It is accessible from above, but an extension cord may be required.
- 🔧 Unscrew from the bottom of the car bottom bolt (it will be difficult here without a pit or lift).
- 🔧 Disconnect power wire (12 mm nut) and solenoid relay connector (latch).
Negative battery terminal disconnected |
Air filter and pipe removed|
The wires are marked with a marker|
Bottom Bolt Tools Prepared|
Lighting is directed towards the work area -->
⚠️ Attention: The bottom bolt often “sticks” due to corrosion. Don't try to tear it off by force - it's better to process it WD-40 and wait 10–15 minutes. If the bolt breaks, you will have to drill it out and cut a new thread, which will make the task much more difficult.
Step 3: Removing the Starter
After unscrewing the bolts, the starter should come out of its seat. Gently pull it to the side right wing (in the direction of travel of the car), at the same time scrolling so as not to catch the bendix on the flywheel. If the starter is stuck, check:
- 🔧 Is any wire pinched?
- 🔧 Does the body rest against the pallet or other elements.
- 🔧 Is the bendix bent (this happens after unsuccessful launches).
What to do if the starter doesn't work?
If the starter cannot be removed even after unscrewing the bolts, try:
1) Rock it left and right, while pulling it towards you.
2) Check to see if there is a piece of bolt or stud left in the seat.
3) Use the mount as a lever (but without fanaticism, so as not to damage the body).
4) Inspect the bendix - it may have caught on the flywheel teeth. In this case, turning the starter counterclockwise will help.
Common mistakes and how to avoid them
Even experienced car owners Nissan Primera P12 make mistakes when removing the starter. Here are the most common:
| Error | Consequences | How to avoid |
|---|---|---|
| The battery was not disconnected | Short circuit, blown fuse or ECU | Always remove the negative terminal first |
| The bottom bolt was torn off | You will have to drill, cut a new thread or use a repair kit | Use penetrating lubricant and do not apply excessive force. |
| Wires mixed up during reassembly | The starter does not work or idles | Take photos or label wires before disconnecting |
| Bendix was damaged during removal | Starter or bendix needs to be replaced | Do not pull the starter by force - carefully turn it |
⚠️ Attention: On Primera P12 With an automatic transmission, the starter is located closer to the box, and careless dismantling can damage it. crankshaft position sensor wiring. If after installing a new starter the engine does not start, check the integrity of this sensor!
Starter diagnostics: what to check after removal
Before you run to the store for a new starter, check the removed assembly. In 30% of cases it can be repaired. Inspect:
- 🔧 Brushes - if their length is less than 5 mm, replacement is required.
- 🔧 Bushings — shaft play of more than 0.5 mm indicates wear.
- 🔧 Bendix — the teeth must be intact, without chips.
- 🔧 Solenoid relay — when 12V is applied, it should operate with a characteristic click.
To check the windings, use a multimeter: 1) Set the ohmmeter mode. 2) Ring the armature winding - there should be resistance 0.1–0.5 Ohm. 3) Check the housing for breakdown - the resistance between the shaft and the housing should tend to infinity.
If the winding “rings” against the housing, the starter must be replaced.
If the starter turns but does not engage, the problem may be in the bendix. Before buying a new unit, try replacing only the bendix - it’s 2-3 times cheaper.
Installing a new starter: nuances and tightening torque
Installation is performed in reverse order, but there are several critical points:
- Clean before installation seat from dirt and oil.
- Check contact status on wires - oxidized terminals can cause voltage loss.
- Tighten the fastening bolts firmly 25–30 Nm (do not overtighten!).
- After connecting the wires, make sure that retractor connector sits tightly - weak contact leads to burning of the terminals.
On Primera P12 with the QR25DE motor, the starter has an elongated housing - do not confuse it with the model for the QR20DE! Installing a “short” starter on a 2.5-liter engine will result in the Bendix not reaching the flywheel.
Cost of work and spare parts
If you decide to entrust the replacement of the starter to a service, be prepared for the following costs (prices are current for 2026):
| Service/Spare part | Cost, ₽ | Notes |
|---|---|---|
| Starter (new, original) | 12 000 – 18 000 | Article: 23300-4M500 (QR20DE), 23300-4M505 (QR25DE) |
| Starter (used or repair kit) | 3 000 – 8 000 | Risk of rapid failure |
| Replacing the starter at a service station | 2 500 – 5 000 | Includes diagnostics and installation |
| Starter repair (replacement of brushes/bushings) | 1 500 – 3 000 | It is beneficial if the body is intact |
Replacing it yourself will only cost the cost of the spare part, but will require time and patience. If you are not confident in your abilities, it is better to turn to professionals - mistakes when working with electrical equipment can be more expensive.
Saving on the original starter often leads to a second replacement after 1-2 years. Cheap analogues (for example, from Fenox or Kraft) rarely last longer than 50,000 km.
Frequently asked questions about the starter Nissan Primera P12
Is it possible to jump start a car with a faulty starter?
On Primera P12 with manual transmission - yes, but there are some nuances: 1) Turn on the ignition and second gear. 2) Accelerate the car to 10–15 km/h and quickly release the clutch. 3) After starting, do not turn off the engine - the starter will still not work.
⚠️ For automatic transmission this is the method unacceptable — risk of damaging the box!
How to check the starter without removing it from the car?
There are 3 ways: 1) Retractor bell: There should be a distinct click when you turn the key. Its absence indicates a relay malfunction or an open circuit. 2) Voltage check: There should be 12V on the starter power wire (thick red) when starting. If less, the problem is in the battery or wires. 3) Spark test: Disconnect the wire from the retractor and short-circuit it to the “+” of the battery. If the starter turns, the relay or ignition switch is faulty.
How long does a starter last? Primera P12?
Service life depends on operating conditions: • Original starter - 150,000–200,000 km. • A high-quality analogue (for example, Denso) — 100,000–150,000 km. • Cheap Chinese starters - 30,000–50,000 km.
Wear is affected by: frequent short trips, extreme temperatures and "long cranking" at start-up.
Is it possible to drive with a faulty starter while starting the car using other methods?
Technically yes, but it is fraught: 1) The risk of being left without starting at the most inopportune moment (for example, on the highway). 2) When starting "with a pusher", the load on the clutch And checkpoint. 3) If the starter sticks, it can block the flywheel, which will lead to a broken timing belt (on QR25DE This can lead to bending of the valves!). Conclusion: Use alternative launch methods only to get to the service.
Which starters are suitable for Primera P12 besides the original ones?
Proven analogues:
• Denso (Japan) - article 280000-0970 (for QR20DE).
• Bosch (Germany) - article 0 001 108 005.
• Valeo (France) - article 438083.
⚠️ Before purchasing, check compatibility by VIN code - on restyled cars Primera P12 (after 2005) there may be starters of a different modification.