Nissan Sentra is one of the most popular sedans in the Japanese brand’s lineup, known for its reliability and maintainability. However, even such a car eventually develops problems that require disassembly - be it replacing the cabin filter, repairing the suspension, or diagnosing the electronics. In this article we will look in detail at how to properly disassemble Sentra different generations (B17, B18, B19), what tools will be needed, and what to pay attention to so as not to damage the parts.

The material will be useful for both novice car owners and experienced craftsmen. We will consider not only standard procedures (removing the bumper, disassembling the front panel), but also nuances that are often silent about in official manuals. For example, How to avoid breaking plastic clips when dismantling the casing or which bolts require replacement? after unscrewing. You will also find current diagrams, tables with fastener sizes and answers to frequently asked questions.

Preparing for Disassembly: Tools and Safety Precautions

Before you start disassembling Nissan Sentra, you need to prepare your workspace and tools. This will save time and prevent damage to parts. Here is the basic set you will need for most operations:

  • 🔧 Set of sockets and keys (sizes: 8, 10, 12, 14, 17 mm - most popular for Sentra).
  • 🔨 Screwdrivers (cross PH2, flat 3–5 mm, and also specialized for Japanese cars with an asterisk).
  • 🧲 Magnetic holder for bolts and nuts - will save you from losing small parts in the engine compartment.
  • 📸 Camera or smartphone — fix the location of wires and fasteners before dismantling.
  • 🧤 Gloves and safety glasses — mandatory when working with sharp body edges and electronics.

Pay special attention plastic clips and pistons. B Sentra they often break when the skin is removed carelessly. Buy a set of spares in advance (item number for B18: 90510-4M000). Also prepare WD-40 or a similar lubricant for stuck bolts - especially important for cars older than 5 years.

⚠️ Attention: Never start disassembling if the car has been parked outside at temperatures below +5°C. The plastic becomes brittle, and the rubber seals may crack during dismantling. Warm up the interior to room temperature or work in a heated garage.

If you plan to disassemble electrical equipment (for example, a control unit or audio system), disconnect the battery 10 minutes before the start of work. This will prevent short circuits and errors in the ECU. For Sentra with the system Nissan Intelligent Key It may be necessary to retrain the keys after a power outage - take this into account in advance.

📊 Which part of the Nissan Sentra do you take apart most often?
  • Salon (panel, seats)
  • Suspension (shock absorbers, levers)
  • Engine and attachments
  • Electrics (lights, blocks)
  • Body (bumper, fenders)

Disassembly of the front panel (dashboard) Nissan Sentra: step by step instructions

Removing the front panel is one of the most time-consuming operations, but you cannot do without it when replacing a stove radiator, repairing a fan, or installing additional equipment. B Sentra (especially in the B18 body) the panel is secured with a combination of bolts and plastic clips, so you need to act carefully.

Disassembly algorithm:

  1. Removing decorative trims. Start with the panel under the steering wheel (unscrew the 2 bolts T20) and the glove compartment (4 screws for a flat-head screwdriver). In models with climate control, first remove the control unit - it is secured with 4 latches.
  2. Removing the center console. Disconnect the backlight and button connectors, then unscrew the 2 bolts under the decorative cover of the gearbox selector. B Sentra with CVT Be careful - the lever is fixed by an additional spring.
  3. Unscrewing the panel. Under the hood, remove the bolts securing the dashboard to the body (2 pieces on the sides), then carefully pull the panel towards you, starting from the right side. Clips often “stick” - help with a flat screwdriver by prying them from the side.

The hardest part is disconnecting wiring. B Sentra 2015+ uses up to 12 connectors (including CAN bus and airbags). Never pull the wires by force - first press the connector lock (usually white or orange). For convenience, mark the connectors with stickers with numbers.

Battery disconnected (negative terminal)

All connectors and their locations were photographed.

Spare clips prepared (minimum 5 pcs.)

Steering column switches removed (if necessary)

The parking brake cable is disconnected (for models with a lever under the panel) -->

After removing the panel, check the condition fuse box (located on the left under the dashboard). B Sentra The heater fan relay contacts often oxidize (fuse F27, 10A). Clean them with alcohol or a special contact spray.

Removing and disassembling the front bumper

Removing the bumper is required when replacing headlights, a radiator, or after an accident. B Nissan Sentra The bumper is secured with 6 bolts (4 on the bottom and 2 on top) plus clips on the sides. The main difficulty is access to the upper bolts, which are hidden under the decorative grille.

Work order:

  1. Unscrew the 4 bolts from the bottom of the bumper (10 mm head). In models with parktronic first disconnect the sensor connectors.
  2. Remove the decorative radiator grille (it is attached to 4 clips - use a screwdriver to pry it from the center to the edges).
  3. Unscrew the 2 upper bolts (12 mm head) and carefully pull the bumper towards you, starting from the corners. The clips on the sides often break - it is better to replace them with new ones (90510-95004).

If the bumper is removed after an accident, inspect bracket fastenings. B Sentra they are often deformed upon impact, resulting in incorrect geometry after installing a new bumper. Use laser level or a tape measure to check symmetry before installation.

⚠️ Attention: In models with adaptive cruise control (ACC) radar is installed under the bumper. When disassembling, do not touch it with your hands - static electricity can damage the sensor. Disconnect the connector only by the plastic housing!
Detail Article number (OEM) Quantity Note
Bumper mounting clip 90510-95004 6 pcs. Recommended to be replaced every time it is removed.
Bumper mounting bolt (lower) 08915-44010 4 pcs. M8×1.25, length 25 mm
Decorative radiator grille 62610-4M000 1 piece Comes with latches
Bumper mounting bracket 62620-4M00A 2 pcs. Right/left, check for deformation

Disassembly of the engine and attachments

Disassembly of the power unit Nissan Sentra (especially with motors HR16DE or MR20DD) requires experience and special tools. Here we will consider only basic operations that you can perform yourself: replacing the timing belt, removing the generator or starter.

To access the engine, remove:

  • 🔋 Battery and its platform (4 bolts x 12 mm).
  • 🚗 Air filter with the box (unscrew the 3 10 mm bolts and loosen the pipe clamp).
  • 🔥 Decorative engine cover (it is mounted on 4 rubber supports).

When replacing the timing belt with HR16DE be sure to check the condition tension roller (article 13070-4M00A) and pumps (21010-4M00B). B Sentra 2013–2019, the pump often begins to leak after 100,000 km. If traces of coolant are visible on it, replace it along with the belt.

How to check the timing belt tension without a special tool?

Turn the crankshaft 2 turns clockwise (at the pulley bolt). If the belt sags by more than 5 mm when pressed with a finger between the camshaft pulleys, tightening or replacement is required.

To remove the generator:

  1. Disconnect the negative battery and remove the generator power terminal (10 mm nut).
  2. Loosen the belt tension bolt (14mm socket) and remove the belt.
  3. Unscrew the 2 generator mounting bolts (upper - 14 mm, lower - 17 mm with extension).
⚠️ Attention: B Sentra with MR20DD (2.0 L) generator is located close to the turbine. When dismantling, do not touch the intercooler pipes - they are plastic and may crack. Also check the condition oil filter (15208-4M00A) - it is often forgotten to be replaced during service.
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Before installing a new timing belt, apply a thin coat to its teeth. lithium grease (For example, LIQUI MOLY Lithoflux). This will reduce wear and prevent squeaking during cold starts.

Suspension analysis: shock absorbers, levers, hubs

Suspension Nissan Sentra (especially in the B17 body) is known for its reliability, but after 150,000 km it requires attention. Most often the following are replaced:

  • 🔧 Front struts (article 54300-4M000 for the right one, 54300-4M001 for the left).
  • 🛠️ Ball joints (40510-4M000) - their resource rarely exceeds 100,000 km.
  • 🔄 Wheel bearings (40520-4M000) - when worn, they emit a hum at speeds of 60+ km/h.

To replace the front strut:

  1. Raise the car on a jack and remove the wheel. Be sure to secure the rear wheels with chocks!
  2. Unscrew the hub nut (32 mm socket) - it often sticks, so use an extension and a lever.
  3. Disconnect the brake caliper (2 14mm bolts) and hang it on a wire to avoid damaging the hose.
  4. Unscrew the 3 bolts securing the strut to the steering knuckle (17 mm socket) and 3 bolts of the upper support (under the hood, 14 mm socket).

When disassembling the rear suspension (multi-link), pay special attention silent blocks of levers (54501-4M00A). B Sentra they “get tired” by 120,000 km, which is manifested by knocking noises when driving over uneven surfaces. To replace them you will need puller — without it there is a high risk of damaging the lever.

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When replacing struts or levers always check the condition of the CV joint boots. B Sentra they often tear when the suspension travel is large, which leads to dirt getting into the hinge and causing it to fail.

Analysis of electronics: control units, sensors, wiring

Electronics Nissan Sentra (especially in 2016+ models) is sensitive to improper handling. For example, disconnecting the battery may reset throttle adaptation or settings NissanConnect. To avoid problems, follow these rules:

  • 🔌 Always use a scanner (For example, Launch X431) to read errors before and after disassembly.
  • 📡 Do not touch the ECU connectors bare hands - static electricity can damage the microcircuits.
  • 🔍 Check the ground circuit (the main wire goes from the battery to the body under the hood). B Sentra The contact often oxidizes, which leads to “floating” errors.

To remove the engine control unit (ECU):

  1. Disconnect the battery and remove the decorative cover under the dashboard (2 clips).
  2. Disconnect all connectors from the ECU (they are marked with the letters A, B, C). B Sentra with CVT There is an additional connector for the box - don’t confuse it!
  3. Unscrew the 4 bolts securing the block (10 mm head) and carefully remove it.

If you take it apart instrument cluster, remember: in Sentra 2013–2020 it is associated with the immobilizer. After replacement or repair, you may need flashing through a dealer scanner. For models with TFT display (for example, in Sentra Nismo) also check the power circuit - it often overheats due to poor ventilation.

Common mistakes during disassembly and how to avoid them

Even experienced craftsmen make mistakes when disassembling Nissan Sentra. Here are the most common ones and how to prevent them:

Error Consequences How to avoid
Using the wrong head size Breaks off the edges of bolts (especially on the suspension) Check the size to application of effort. For Sentra 10 and 12 mm bolts are critical.
Unlabeled wiring connectors Incorrect connection, short circuit Take photos or stick stickers with numbers on each connector.
Disassembly without engine support Damage to airbags or radiator Use jack for oil drain plug or a special traverse.
Ignoring tightening torques Unscrewing bolts, leaking gaskets Follow the manual: for example, the cylinder head bolts are tightened in 3 stages with a torque of 100 Nm.

Another typical problem is damage to plastic clips when removing the casing. B Sentra they often break due to the fact that they try to pull them straight out, rather than moving them sideways. Use a special clip remover or a flathead screwdriver.

When working with fuel system (for example, when replacing a fuel pump), be sure to relieve the pressure! To do this:

  1. Remove the fuel pump fuse (F22, 15A in the block under the hood).
  2. Start the engine and let it stop.
  3. Repeat the start 2-3 times to release any residual pressure.

FAQ: Answers to frequently asked questions

Is it possible to disassemble Nissan Sentra without pit or lift?

Yes, but with reservations. To replace the front struts or brake pads, a jack and stops are enough. However, for work on the suspension or exhaust system necessarily use an inspection hole or overpass - otherwise there is a high risk of injury.

What tool is needed to remove the door?

To dismantle the door Sentra you will need:

  • 10 mm head (4 hinge mounting bolts).
  • Flat head screwdriver for removing trim (clips) 90510-5M000).
  • Glass puller (if the window lifter needs to be replaced).

Important: before removing the door, disconnect the wiring connector at the end - it is secured with a plastic clip.

What to do if the Check Engine light comes on after disassembly?

First check:

  1. The tightness of all connectors (especially on the throttle valve and oxygen sensors).
  2. Integrity of vacuum hoses (in Sentra they often rub against the body).
  3. Scanner error codes - if this P0100 (MAF sensor), clean it special spray.

If the error does not reset, the wiring or the control unit itself may be damaged.

How often should the interior be disassembled for preventive maintenance?

Complete disassembly of the interior Sentra For prevention, it is recommended to carry out once every 3-4 years. During this period:

  • Clean the drainage holes under the windshield (they become clogged with leaves).
  • Check the condition of the wiring under the seats (often frayed due to vibration).
  • Processing plastic parts interior air conditioner (prevents squeaking).
Is it possible to use non-original spare parts during disassembly?

Yes, but with caution. For critical nodes (hub bearings, timing belt, brake pads) it is better to take the original or trusted manufacturers (NTN, Gates, Akebono). For body parts (bumper, trim), analogues from Dorman or TYC, but check compatibility by VIN.