Nissan Pulsar is a compact hatchback that has gained popularity due to its reliability and practicality. However, like any car, it is not immune to corrosion, especially in the sill area. This part of the body is the first to take on the impacts of gravel, salt and moisture, which leads to rust, chips and even through holes. In this article, we will look at how to diagnose problems with thresholds, select spare parts, carry out repairs yourself or at a service center, and also consider the best methods of anti-corrosion protection.
Feature Pulsar (in bodies N17 And N18) - the design of thresholds with internal amplifiers, which often rust from the inside, remaining invisible from the outside. If you ignore the first signs of corrosion, repairs can cost many times more. We have collected proven solutions: from budget treatment with Movil to complete replacement of thresholds by welding, and we will also tell you what mistakes owners most often make during restoration.
Threshold design Nissan Pulsar: what you need to know before repair
Thresholds Nissan Pulsar consist of three key elements:
- 🔧 External panel - the visible part, which most often suffers from mechanical damage (scratches, chips).
- 🛡️ Reinforcement (inner beam) — a metal profile welded to the body is responsible for rigidity. This is where hidden corrosion begins.
- 🧩 Connecting elements — welds and bolts securing the threshold to the side members and the bottom.
In models Pulsar N17 (2013–2018) and N18 (restyling) the design of the thresholds is almost identical, but differs in the thickness of the metal: N18 it is 0.2 mm thinner, which accelerates the formation of rust. Important: in cars with factory galvanization (European assembly), corrosion appears less frequently than in Russian or Asian versions.
Before starting repairs, check:
- 🔍 Condition of welds — they are often the first to rust due to a violation of the factory anticorrosion protection.
- 💧 Drainage holes - if they are clogged with dirt, moisture accumulates inside the threshold.
- 🔨 Fastening plastic covers — pockets of corrosion are often hidden under them.
- N17 (pre-restayl)
- N18 (restyling)
- I don't know
- Other
Signs of threshold corrosion: when to sound the alarm
Rust on the thresholds Pulsar It appears gradually and is easy to miss in the early stages. Pay attention to the following symptoms:
| Corrosion stage | Signs | Recommendations |
|---|---|---|
| Initial | Matte spots, bubbles under the paint, a light coating of red color. | Treat with a rust converter and apply anti-corrosion agent. |
| Average | Blistering of paint, visible holes up to 1 cm in diameter, crunching when pressed. | Local repairs involving cutting out rusty metal and welding on a patch. |
| Critical | Through holes, deformation of the threshold, rust on the amplifier. | Complete replacement of the threshold or amplifier by welding. |
Particularly dangerous hidden corrosion - when the threshold looks normal from the outside, but inside the amplifier has turned into dust. You can check this by tapping the threshold with a wooden hammer: a dull sound indicates rust. Another way is to remove the plastic covers and inspect the metal underneath with a flashlight.
⚠️ Attention: If you hear a creaking or play when you open the door, this may indicate the destruction of the sill's fastenings to the body. In this case, urgent diagnostics on the lift is required.
Selection of spare parts: original vs. analogues
When replacing thresholds with Nissan Pulsar Owners have three options:
- 🔹 Original thresholds (item:
62600-4M000for the left,62600-4M001for the right one). Pros: perfect fit, factory quality metal. Cons: price from 12,000 rubles. per side, long delivery time. - 🔹 Analogues from Dorman, Febi, Meyle. They cost 30–40% less than the original, but may differ in metal thickness and require adjustment.
- 🔹 Used thresholds from disassembly. A budget option (from RUB 3,000), but the risk of buying a rusty part is high. Be sure to check the amplifier before purchasing!
For Pulsar N18 suitable thresholds from Renault Megane III (the platform is the same), but the fastenings will need to be modified. If your budget is limited, you might consider repair inserts — parts of the threshold that are welded instead of rusted areas (price from 1,500 rubles).
When purchasing analogues, pay attention to the country of manufacture: Turkish and Polish thresholds are often 0.3–0.5 mm thinner than the original ones, which shortens their service life.
Important: when replacing thresholds, be sure to buy set of fastening elements (bolts, nuts, weld points). Original articles: 08915-14010 (M8 bolt), 08905-60010 (nut).
Replacing thresholds Nissan Pulsar do it yourself: step by step instructions
Completely replacing a threshold is a labor-intensive process that requires a welding machine, an angle grinder, and skills in working with metal. If you have no experience, it is better to entrust the work to professionals. However, local repairs (patch, amplifier) can be done independently.
Remove the negative terminal of the battery|Remove the plastic door sill covers|Clean the repair area from dirt and oil|Jack the car and install supports|Protect the glass and body with masking tape-->
Tools and materials:
- 🔧 Grinder with cutting wheel (125 mm).
- 🔥 Semi-automatic welding (wire 0.8 mm).
- 🧲 Magnetic square for precise cutting.
- 🧴 Anti-corrosion mastic (Dinitrol, Tectyl).
- 🎨 Primer and paint in body color (color code is indicated on the plate under the hood).
Step by step process:
- Using a grinder, cut out the rusty section of the threshold, retreating 2–3 cm from the edge of the corrosion.
- Clean the metal to a shine, treat it with a rust converter (Tsinkar).
- Try on and fit the new part (or patch), secure it by welding at 3-4 points.
- Boil the seam with a continuous seam and clean it with a sander.
- Apply primer, paint and anti-corrosive agent (layer of at least 0.3 mm).
⚠️ Attention: When welding, do not overheat the metal - this can deform the threshold and disrupt the geometry of the body. Optimal current for a semi-automatic device: 80–100 A.
How to avoid metal burnout when welding?
Use an interrupted weld (spot welding every 2-3 cm) and allow the metal to cool. For thin metal (0.8–1 mm), ER70S-6 wire with a diameter of 0.6 mm is suitable.
Anti-corrosion treatment: how to protect thresholds for a long time
Even new thresholds without protection will last no more than 2-3 years. To prevent corrosion, take a comprehensive approach:
1. Passive protection (for new or repaired thresholds):
- 🛡️ Movil with zinc - applied with a brush or spray to the inner surface. Update once every 2 years.
- 🧴 Liquid plastic (Body 930) - protects against chipping, applied over paint.
- 🔧 Anti-gravel film — glued to the lower part of the threshold (thickness 0.2–0.3 mm).
2. Active protection (if there is already rust):
- 🧪 Rust converter (Tsinkar, Fenom) - converts oxides into phosphates.
- 🔥 Galvanic galvanization — restores the zinc layer (requires special equipment).
- 🧲 Electronic protectors — devices that slow down corrosion due to an electrochemical reaction.
A critical mistake many owners make is treating thresholds only from the outside. 70% of corrosion starts from the inside, so be sure to remove the plastic covers and coat the amplifier with anti-corrosive agent through the technological holes.
The best protection against corrosion is a combination of Movil (inside) + anti-gravel film (outside) + regular washing in winter.
Cost of service work: what affects the price
Threshold repair price Nissan Pulsar depends on the scope of work, region and level of service. Average prices in Russia (2026):
| Type of work | Cost (per side) | Due date |
|---|---|---|
| Local repair (patch) | 4,000 – 7,000 rub. | 1–2 days |
| Complete replacement of the threshold (with painting) | 15,000 – 25,000 rub. | 3–5 days |
| Anti-corrosion treatment (complex) | 3,000 – 6,000 rub. | 1 day |
Additional costs:
- 🔧 Wheel alignment — if replacing the threshold affected the geometry (from RUB 1,500).
- 🎨 Painting in color — if a non-original part is used (from RUB 5,000).
- 🚗 Tow truck — if the car is not running (from RUB 2,000).
You can save money if you buy spare parts yourself in advance and agree with the service only for work. For example, the original threshold costs ~12,000 rubles, and its replacement will cost 8,000–10,000 rubles.
Common mistakes when repairing thresholds and how to avoid them
Even experienced craftsmen sometimes make mistakes that shorten the service life of repaired thresholds. Here's what not to do:
1. Ignore hidden corrosion. If you don't clean the rust from inside the amplifier, it will continue to spread under the new patch. Solution: Use an endoscope for inspection or cut out an inspection window.
2. Weld with a thick seam. This leads to overheating of the metal and deformation. The optimal seam thickness is 2–3 mm.
3. Do not process welds. Without anticorrosive, the seams rust first. Apply Tsinkol or ML-mastic immediately after welding.
4. Use incompatible paint. For example, acrylic paint without primer on an epoxy base will quickly flake off. Always use a leveling primer.
5. Close drainage holes. If you forget to clean or drill new holes after repair, moisture will accumulate inside.
Before painting, be sure to check the threshold with a magnet - if it does not attract, it means there is rust or putty left that needs to be removed.
FAQ: Answers to frequently asked questions about thresholds Nissan Pulsar
Is it possible to drive with rusty sills?
If the corrosion is superficial - yes, but not more than 1-2 years. Through holes or rust on the amplifier are dangerous: the threshold loses its rigidity, which threatens safety in an accident. In addition, rust can spread to the side members, and then repairs will cost 100,000+ rubles.
How often do thresholds need to be treated with anticorrosive?
For Nissan Pulsar recommended:
- 🌧️ in winter — before the season (October–November) and after (March–April).
- 🚿 Summer — after each high-pressure wash (a jet of water can wash off the protection).
If you use Movil - once every 2 years, if liquid plastic - once a year.
What is the difference between thresholds N17 and N18?
Main differences:
- N17 (2013–2016) - the sills are 10 mm wider, the amplifier is thicker (1.2 mm).
- N18 (2016–2018) - the thresholds are narrower, the metal is thinner (1.0 mm), but galvanization is better.
Spare parts are not interchangeable without modification!
How long do thresholds last after repair?
The period depends on the quality of work:
- 🔧 Local repair (patch) — 3–5 years with proper anti-corrosion treatment.
- 🆕 Complete replacement with galvanization - 8–10 years.
- ⚠️ No protection — 1–2 years before re-corrosion.
Is it possible to restore thresholds without welding?
Yes, but this is a temporary solution:
- 🧴 Fiberglass + epoxy resin - suitable for holes up to 3 cm.
- 🔧 Aluminum patches with rivets - only for the outer panel.
- ❌ putty - unacceptable because it does not support the load.
Without welding, the threshold will not restore its strength!