<em>Nissan Primera P12</em>ignition coil: how to check, select and replace

Nissan Primera P12 (2002–2008) with engines QG18DE (1.8 l) and QR20DE (2.0 l) was equipped with individual ignition coils for each cylinder. These components often become a source of problems after 150–200 thousand kilometers, especially when operating in conditions of high humidity or with low-quality fuel. Unlike old systems with a distributor, here each coil operates independently, which simplifies diagnostics, but complicates the selection of spare parts.

In this article we will analyze signs of troublelike check ignition coil multimeter and “by ear”, which articles of original and analogues suitable for Primera P12, and also give step-by-step replacement instructions with nuances for engines QG18DE And QR20DE. We will pay special attention to typical installation errors that can lead to damage to the ECU or wires.

Signs of a faulty ignition coil Nissan Primera P12

Symptoms of a broken ignition coil Primera P12 often disguised as other problems - from clogged injectors to a faulty lambda probe. However there is characteristic features, which point directly to the coil:

• 🔥 Engine tripping — misfires in one cylinder (usually when cold or after warming up). On QR20DE this manifests itself as a “twitching” at idle, at QG18DE — loss of power during acceleration.
• ⚡ Startup problems — the engine starts within 2–3 attempts, especially in wet weather. This is due to cracks in the coil insulation, where moisture penetrates.
• 🚨 Check Engine with codes P0300 (numerous omissions), P0301–P0304 (misfires in a specific cylinder) or P0351–P0354 (coil circuit malfunction).
• 💥 Popping sounds in the exhaust system — the unburnt air-fuel mixture burns out in the catalyst, which can destroy it.

On Primera P12 with QR20DE a faulty coil often leads to vibrations on the body when driving at a speed of 60–80 km/h. This is due to an imbalance in the cylinders. On QG18DE the symptoms are more “fuzzy” - the engine may simply “stupid” without obvious misfires.

⚠️ Attention: If misfires remain after replacing the coil, check condition of the candles (the gap should be 1.0–1.1 mm) and low voltage wires. On Primera P12 The coil power connector often wears out - its contacts oxidize or burn.

How to check the ignition coil for Nissan Primera P12 multimeter

Diagnostics of the ignition coil Primera P12 includes visual inspection And resistance check. To do this, you will need a multimeter with a resistance measurement mode (200 Ohm / 20 kOhm).

Step by step instructions:

1. Removing the coil: Disconnect the negative terminal of the battery. Press the latch of the coil power connector and disconnect it. Unscrew the fastening bolt (10mm wrench) and carefully remove the coil.
2. Visual inspection: Check for cracks, traces of breakdown (black dots) or melting. Pay special attention rubber tip - if it hardens or cracks, the coil needs to be replaced.
3. Resistance test:
   • 🔌 Primary winding: Connect the multimeter probes to the contacts 1 And 3 (at the coil connector). There must be resistance 0.5–1.0 Ohm.
   • ⚡ Secondary winding: One probe to the central terminal (to the spark plug), the second to the contact 3. Resistance: 8–12 kOhm.

If the readings are outside the normal range, the coil is faulty. Also check insulation integrity megohmmeter (resistance must be at least 50 MOhm).

Remove the battery terminal (-)

Clean the reel from dirt with a dry cloth.

Check the integrity of the rubber tip

Prepare a multimeter (200 Ohm / 20 kOhm mode)

Mark the location of the wires (photo on your phone) -->

Parameter	Norm for QG18DE	Norm for QR20DE
Primary winding resistance	0.6–0.9 Ohm	0.5–0.8 Ohm
Secondary winding resistance	9–11 kOhm	8–10 kOhm
Minimum insulation resistance	50 MOhm	50 MOhm

On Primera P12 with QR20DE coils from QG18DE physically suitable, but have a different secondary winding resistance. Installing them will lead to misfires and an error. P0351.

Original articles and analogues of ignition coils for Nissan Primera P12

For Primera P12 supplies original ignition coils Hitachi (Japanese production) or Mitsubishi Electric (for QR20DE). However, their price is often too high (from 8,000 rubles per piece), so many people choose high-quality analogues.

Original articles:

• 🔧 QG18DE (1.8 l): 22448-7M500 or 22448-7M505
• 🔧 QR20DE (2.0 l): 22448-4M200 or 22448-4M205

The best analogues (in terms of price/quality ratio):

• 💎 Denso 55001-0200 — a complete analogue of the original, resource 150+ thousand km.
• 💎 NGK U5008 - Suitable for both engines, but requires a resistance check.
• 💎 Bosch 0 221 504 478 - a budget option (from 2,500 rubles), but sensitive to moisture.
• 💎 Beru ZS198 - German quality, but rarely found in stores.

When choosing an analogue, pay attention to rubber tip length - on QR20DE it's shorter than QG18DE. Also check the package: the original comes with thermal paste for better heat dissipation, cheap analogues may not have it.

How to distinguish a fake from the original?

Original reel Hitachi has:

1. Logo engraved (not sticker).

2. The case is made of matte plastic (fakes have a glossy one).

3. Weight of at least 300 g (counterfeits are 50–100 g lighter).

4. The power connector has protective rubber seals.

Step-by-step replacement of the ignition coil with Nissan Primera P12

Replacing the coil with Primera P12 takes 20–30 minutes. The main thing is not to mix up the wires and damage the connectors. To work you will need:

• 🔧 Key for 10 (head or open-end).
• 🔧 Screwdriver with a flat blade (for the connector lock).
• 🔧 Dielectric grease (e.g. Liqui Moly Silicone-Fett).
• 🔧 New spark plugs (we recommend NGK IFR6A11 or Denso IW16).

Instructions:

1. Disconnect the battery. Remove the negative terminal to avoid short circuit.
2. Remove the decorative engine cover. On QR20DE it is attached with 4 latches, on QG18DE - on 2 bolts.
3. Disconnect the power connector. Press the plastic lock and pull the connector up. Don't pull the wires!
4. Unscrew the fastening bolt. Use the key to 10. On QR20DE the bolt may be hidden under a plastic plug.
5. Remove the spool. Pull it upward with force - the rubber tip sits tightly on the candle.
6. Install a new coil. Before installation, apply thin layer of dielectric grease on the rubber tip.
7. Connect the connector and secure with the bolt. Make sure the connector latch clicks into place.

Important details:

• 🔥 On QR20DE coils of cylinders 1 and 4 have longer wiresthan 2 and 3. Do not confuse them during installation!
• ⚡ After replacement, reset the ECU errors using a scanner or by disconnecting the battery for 10 minutes.

Typical mistakes when replacing an ignition coil and how to avoid them

Even experienced car owners make mistakes when replacing coils with Primera P12, which leads to new problems. Here are the most common:

1. Using incompatible coils. For example, installing a coil from Almera N16 (article 22448-4M000) on QR20DE. It physically fits, but has a different resistance, which leads to ECU overheating.
2. Damage to the power connector. The connector lock is fragile - if it is broken, you will have to change the entire wiring harness (price from 15,000 rubles).
3. No dielectric grease. Without it, the rubber tip sticks to the spark plug and can be torn the next time it is replaced.
4. Incorrect bolt tightening. If you overtighten, the coil body will crack. If you don't tighten it enough, it will vibrate, which will lead to a wire break.

⚠️ Attention: On Primera P12 with QR20DE after replacing the coil an error may appear P0300 because of incorrect spark plug gap. Always check the gap with a feeler gauge - it should be 1.0–1.1 mm.

Another typical problem is moisture entering the coil wells. On Primera P12 The drain holes in the motor cover often become clogged and water pools around the coils. Solution: Clean the holes and apply silicone grease on seals.

Cost of work and spare parts: where is it cheaper to replace the ignition coil

Cost of replacing the ignition coil Nissan Primera P12 depends on the type of spare part and region. Below are the average prices for 2026:

Spare part/service	Price (RUB)	Notes
Original reel (Hitachi)	7 500–9 000	Article 22448-4M200 (QR20DE)
Analogue (Denso or NGK)	3 000–4 500	Resource 100–150 thousand km
Budget analogue (Bosch)	2 000–2 800	Sensitive to moisture, resource 50–80 thousand km
Replacing 1 coil (service station)	800–1 500	Includes diagnostics
Replacing all 4 coils (service station)	3 000–5 000	Recommended for mileage of 200+ thousand km

Replacing it yourself will cost only the cost of the spare part. However, if you have no experience, it is better to contact a service station - installation errors can lead to damage to the ECU (repair from RUB 20,000).

Where to buy spare parts:

• 🛒 Official dealers Nissan: 1 year warranty, but the price is 30-50% higher than the market.
• 🛒 Online stores: Exist.ru, Autodoc, Kolesa-darom.ru — often there are discounts up to 20%.
• 🛒 Spare parts markets: You can bargain, but there is a risk of running into a fake.

When buying a used coil (price from 1,500 rubles), be sure to check it with a multimeter - the service life of such parts is unpredictable.

Frequently asked questions about ignition coils on Nissan Primera P12

Is it possible to drive with a faulty ignition coil?

In the short term - yes, but this will lead to:

• 🔥 Catalyst overload (unburned fuel burns out in it, which destroys the honeycomb).
• 💥 Damage to spark plugs - when the cylinder is not working, they are filled with gasoline.
• ⚡ Increased fuel consumption (up to +20% due to misfires).

We recommend replacing the coil within 1-2 weeks of symptoms appearing.

What is the lifespan of ignition coils? Primera P12?

Service life depends on operating conditions:

• 🚗 Original coils: 150–200 thousand km.
• 🚗 High-quality analogues (Denso, NGK): 100–150 thousand km.
• 🚗 Budget analogues (Bosch, Beru): 50–80 thousand km.

The resource is affected by: fuel quality, humidity, frequency of cold starts.

What happens if you install a coil from another engine?

If the winding resistance does not match:

• ⚡ The ECU will supply incorrect voltagewhich will lead to misfires.
• 🔥 The coil or ECU can overheat and fail.
• 🚨 Lights up Check Engine with code P0351–P0354.

Exception: coils from Nissan Almera N16 (2.0 L) compatible with QR20DE, but require resistance testing.

Do I need to change spark plugs when replacing a coil?

Yes, it is recommended. Reasons:

• 🔧 Old candles may have increased clearance (more than 1.1 mm), which reduces the life of the new coil.
• 💥 Soot on candles worsens heat sink, causing the coil to overheat.

The best choice for Primera P12: NGK IFR6A11 or Denso IW16 (gap 1.0 mm).

Is it possible to repair the ignition coil?

Theoretically, you can rewind the windings, but in practice this is:

• 💰 More expensive than buying a new one (repairs cost 3,000–5,000 rubles).
• ⏳ Unreliable — the restored coil will last 10–20 thousand km.
• ⚡ Dangerous — incorrect winding can cause a breakdown to ground.

Exception: replacement rubber tip (costs 200–300 rubles), if the coil itself is in good condition.