Nissan Sunny FB15: interior analysis, weak points and tuning options

Nissan Sunny FB15 is a legendary sedan that has gained popularity due to its reliability, simplicity of design and unpretentiousness. However, the interior of this car, produced between 1990 and 1995, today raises many questions among owners. Plastic cracks, upholstery wears out, and electronics begin to act up. In this article we will analyze in detail FB15 interior design, we will identify typical problems and show how to solve them - from cosmetic repairs to deep tuning.

Feature Sunny of this generation - his modular layout. Many interior elements are unified with other models Nissan (For example, Primera P10 or Almera N15), which simplifies the search for spare parts. But there are also unique parts that are difficult to find today. We have collected up-to-date information about compatibility of instrument panels, seats and trim elements with other models of the concernso you can save on repairs.

FB15 interior design and materials: what's inside?

Salon Nissan Sunny FB15 made in a classic 90s style: straight lines, minimalism and practicality. Basic materials:

• 🔲 Instrument panel plastic: hard ABS plastic, prone to cracks at the joints (especially in the places where the air deflectors are attached).
• 🪑 Seat upholstery: fabric (basic) or velor (optional), which wear out on the side bolsters over time.
• 🚪 Door cards: a combination of plastic and thin foam rubber that crumbles after 20-25 years.
• ⚙️ Levers and buttons: chrome-plated plastic (on the gear knob, steering column switches), which fades.

Interesting detail: in FB15 used modular dashboard, which is secured with only 6 bolts. This simplifies disassembly, but at the same time makes the panel less resistant to vibrations. For example, when driving off-road, the fastenings of the glove compartment or center console often become loose.

The interior electronics are built on relays and simple microcircuits. This is a plus from the point of view of maintainability, but a minus - due to the lack of a CAN bus, fault diagnosis requires manual checking of each node. For example, if the instrument lighting does not work, you will have to ring sequentially fuse F10 (7.5A), relay R7 and the lamps themselves.

Typical FB15 interior problems and their causes

Owners Sunny FB15 The most common problems encountered are:

Problem	Reason	Remedy
Cracks on the dashboard	Drying of plastic from the sun, vibration	Repair with liquid plastic or replacement with a panel from Primera P10 (compatibility 80%)
Door cards squeak	Wear of the foam gasket between the card and the metal of the door	Installing additional dampers or replacing the gasket with polyurethane foam
Heated rear window does not work	Oxidation of terminal contacts or broken threads	Cleaning contacts or repairing threads with conductive paste
Water leaks into the cabin	Clogged drain holes under the windshield or cracked seal	Cleaning the drainage or replacing the seal (part number 77110-4M000)

Deserves special attention electrical wiring. B FB15 Wires often fray in the corrugation under the dashboard (especially near the gas pedal) and in doorways. This leads to short circuits or failure of the power windows. You can check the integrity of the wiring with a multimeter in test mode, having first disconnected the negative terminal of the battery.

⚠️ Attention: if after rain a damp smell appears in the interior, check the condition immediately windshield seal. B FB15 it often moves away from the body, which leads to corrosion of the floor under the driver's feet. Replacing a seal will cost 1,500–2,500 rubles, and repairing rust will cost 10–15 times more.

Disassembling the FB15 interior: step-by-step instructions

Partial or complete disassembly will be required to access most interior components. Let's start with dashboard:

1. Disconnect the negative terminal of the battery.
2. Remove the steering wheel (unscrew the nut on 24 mm and pull it towards you).
3. Remove the lower dashboard trim (2 screws under the glove compartment and 2 clips on the sides).
4. Unscrew the 6 bolts securing the panel (4 on top and 2 on the bottom under the trim).
5. Disconnect all connectors (there are 8–10 depending on the configuration).

To remove door cards You will need a flathead screwdriver and patience:

• 🔧 Unscrew the screw under the door opening handle.
• 🕳️ Place the clips around the perimeter of the card (there are 6-8 of them).
• ⚡ Disconnect the power window and speaker connectors.

When disassembling seats Please note that the guides are secured with 4 bolts M10 on each side. After dismantling, check the condition of the adjustment mechanism - in FB15 Plastic gears often break, which can be replaced with metal ones from Nissan Almera N15 (article 64010-4M000).

How to remove the ceiling trim?

The headliner in FB15 is secured with 12 clips and 2 screws (above the rear seats). To remove it, first remove the sun visors, passenger handles and dome light. Then carefully pull the trim down, starting from the rear doors. Be careful - the clips are fragile and break frequently!

Interior tuning: from cosmetics to deep modernization

Owners Sunny FB15 choose two main directions for interior tuning:

1. Restoration — return to factory appearance with replacement of worn elements.
2. Modernization — installation of parts from other models or custom solutions.

For restoration will fit:

• 🛋️ Seat covers from Covercraft or Katzkin (price from 8,000 ₽).
• 🎨 Plastic recovery liquid vinyl or painting matte black (use paint Plasti Dip).
• 🔧 Steering wheel repair kits (lining made of leather or perforated Alcantara).

For modernization popular:

• 📱 Installation android radios with support Apple CarPlay (suitable 2DIN model from Pioneer SPH-DA130DAB).
• 💡 Replacing incandescent lamps with LED (for example, in the dashboard - diodes T10 12V white).
• 🪑 Installation seats from Nissan Primera P12 (full compatibility with regard to fastenings, but modification of the heating wiring will be required).

The original solution is replacement steering wheel to sports from Nissan Silvia S14 (the spline connection matches, but you will need an adapter for the buttons). You can also install short-stroke gearshift link from Nissan 200SX S13, which will make gear shifting clearer.

Interior electronics: diagnostics and repair

Electrical diagram Sunny FB15 simple, but has several “weak points”:

• 🔋 Fuse box (located to the left of the steering wheel) - contacts often oxidize, especially on fuses F3 (cigarette lighter) and F14 (window lifters).
• 🔊 Audio system - in the standard radio Clarion The amplifier fails (symptom: there is sound, but with interference).
• 🚗 Speed sensor (at the gearbox) - if it malfunctions, the speedometer jerks or does not work.

To diagnose faults, use electrical diagram (you can find it in the manual EWM900U0). For example, if the power windows do not work, check:

1. fuse F14 (20A).
2. Relay R3 in the block under the hood.
3. Wiring in the corrugation between the door and the counter (often frays).
4. Window lift motor (test with a resistance tester).

If the problem is dashboard (the lamps do not light up, the tachometer needle twitches), most likely the voltage stabilizer has failed IC1 (chip 7805). You can replace it yourself if you have a soldering iron and skills in working with electronics.

⚠️ Attention: when replacing lamps in the dashboard do not use LEDs with power higher than 1W. This can lead to overheating of the board and failure of resistors R1–R4, responsible for limiting the current.

Replacing upholstery and soundproofing the interior

Standard sound insulation FB15 leaves much to be desired: at speeds above 90 km/h you can hear the noise from the wheels and wind in the cabin. This can be solved using an integrated approach:

1. Removing old upholstery (especially on doors and floors).
2. Laying vibration insulation (For example, StP Aero 2–3 mm thick).
3. Sound-absorbing layer (penofol or Accent Premium).
4. New upholstery (leatherette or Alcantara).

A soundproofing kit is suitable for doors Shumoff Door (cost ~3,500 ₽ for 4 doors). Better to lay it on the floor Vibroplast Silver (article VP-MS-2), and on top there is a carpet with a rubber base. This will reduce noise by 30-40% and reduce vibrations.

When replacing the headliner, use material Headliner (density 400–500 g/m²). It can be glued with special glue 3M Super 77, having previously cleaned the surface of old glue with a solvent 646.

Where to buy spare parts for the FB15 interior: trusted sources

New original parts for Sunny FB15 no longer produced, but can be found:

Detail	Where to look	Average price	Alternative
Instrument panel	Showdown in Japan (eBay, CarFromJapan)	12 000–18 000 ₽	Panel from Primera P10 (lighting needs improvement)
Door cards	Local showdowns (Avito, Drom)	3 000–6 000 ₽	Cards from Almera N15 (fastenings are the same, but the shape is different)
Steering wheel	Tuning stores (Drive2, Tuning-Pro)	5 000–15 000 ₽	Steering wheel from Silvia S14 (adapter needed)
Seats	Showdowns in Europe (EuroCarParts)	8 000–20 000 ₽	Seats from Primera P12 (full compatibility)

When purchasing used parts, pay attention to:

• 🔍 Condition of the plastic (are there any cracks or chips).
• 🔌 Integrity of connectors (oxidation of contacts).
• 📏Color match (interior paint code FB15 - L30 for gray, L20 for beige).

For rare parts (for example, rear shelf for speakers) you can order 3D printing according to the original drawing. The cost of such a service is from RUB 2,000 per part.

FAQ: answers to frequently asked questions about the FB15 interior

Is it possible to install an air conditioner in FB15 if it did not come with it from the factory?

Yes, but it is a labor-intensive process. You will need:

1. Buy an air conditioner kit from Nissan Almera N15 (fastening compatible).
2. Install an additional radiator fan.
3. Lay new lines and fill the system with freon R134a.

The cost of service work is from 25,000 ₽.

How to eliminate squeaking plastic dashboard?

Creaking occurs due to the friction of plastic parts against each other. Solutions:

• Treat joints with silicone grease WD-40 Specialist.
• Install felt pads between panels.
• Secure the dashboard with additional screws (in places where there are no standard fasteners).

What speakers are suitable to replace the standard ones in FB15 doors?

The standard speakers are 13 cm (5.25"). Recommended replacements:

• Pioneer TS-A1305C (power 300 W, sensitivity 88 dB).
• Alpine SXE-1325S (improved mid frequencies).
• JBL GTO529 (with titanium diffusers for clear sound).

For installation, you will need to modify the seats (widen the holes by 1–2 mm).

What to do if the dashboard backlight does not work?

Causes and solutions:

1. Bulbs are burnt out - replace them with T5 12V (base W2.1x9.5d).
2. The voltage stabilizer has failed - replace the microcircuit 7805 on the board.
3. The connector contacts have oxidized - clean them with sandpaper.

If the problem is in the board, you can order repairs from electronics specialists (cost ~3,000 ₽).

How to remove the headliner without breaking the clips?

Algorithm:

1. Remove the sun visors (unscrew 2 screws on each).
2. Remove the lampshade (disconnect the connector).
3. Gently pull the trim downwards, starting from the rear doors, using plastic spatulas.
4. Are the clips broken? Buy new ones (item number 73210-4M000, price ~50 ₽ per piece).