Trapezium wipers <em>Nissan Primera P11</em>: design, malfunctions and repairs

The windshield wiper trapezoid is one of those units Nissan Primera P11, which often goes unnoticed until it starts to act up. Meanwhile, not only the comfort of driving in the rain, but also safety depends on its serviceability: poorly functioning wipers can cause an accident due to limited visibility. Owners Primera P11 (1996–2002) are faced with typical trapezoid problems: creaking, uneven movement of the brushes, complete failure of the mechanism. In this article, we will look at how the windshield wiper trapezium on this model works, what its weak points are, and what to do if it fails.

Feature Primera P11 - at its “age”: most copies are already over 20 years old, and the plastic gears and trapezoid bushings wear out by this time even with careful use. In addition, original spare parts Nissan for this model are becoming increasingly rare, and owners have to choose between analogues, used parts or repairs. We have collected all the necessary information: from part numbers and prices to step-by-step replacement instructions - so that you can restore the operation of your wipers without extra costs.

Trapezoid wiper device Nissan Primera P11

Trapezoid wipers Primera P11 - this is a mechanical unit that converts the rotational movement of the electric motor into the reciprocating movement of the wipers. Unlike more modern models, which often use independent drives for each brush, a classic scheme with single shaft and a system of levers. Main components:

• 🔧 Electric motor — a drive element located under the plastic panel at the base of the windshield. On P11 A DC motor with a gearbox was installed.
• ⚙️ Gearbox - reduces engine speed and transmits torque to the crank mechanism. This is where plastic gears most often break.
• 🔗 Lever system (trapezoid) - metal rods connected by hinges. Responsible for the synchronous movement of both brushes.
• 🛠️ Bushings and seals — ensure smooth rotation of the shaft. Over time they wear out, which leads to play and squeaking.

On Primera P11 The wiper trapezium is attached to the body at three points: two bolts at the base of the windshield and one on the side of the engine compartment. Design feature - asymmetric brush movement: The right brush has a larger rotation angle than the left one. This is done to optimally clear the driver's viewing area. However, this arrangement increases the load on the right trapezoid arm, which accelerates its wear.

It is important to understand that the trapezoid works in conjunction with wiper relay (located in the mounting block) and switch on the steering column. If problems with wipers are accompanied by a non-working switch or lack of response to commands, the reason may lie not in the mechanics, but in the electrics.

Typical malfunctions of the trapezoid wipers

Symptoms of a broken trapezoid Primera P11 They usually appear gradually, but should not be ignored. Here are the most common symptoms of a malfunction:

• 🔊 Creaking or knocking when the wipers are operating - indicates wear on the bushings or lack of lubrication in the hinges.
• 🌀 Uneven brush movement (one “lags” behind the other) - a signal about play in the levers or breakage of the plastic elements of the gearbox.
• ⚡ The wipers work jerkily — there may be a problem with the electric motor or oxidation of the contacts in the power circuit.
• 🚫 Complete refusal (the brushes do not move) - can be caused by a break in the traction, a jammed gearbox or a burnt-out motor.
• 💧 Oil leaks under plastic protection - indicates the destruction of the trapezoid shaft seal.

On Primera P11 Most often they fail:

1. Plastic gear reducer — the teeth crack or wear out, especially if the wipers often work “dry” (without water).
2. Arm mounting bushings — are developed, which leads to backlash and non-synchronous operation of the brushes.
3. Electric motor - suffers from overheating or short circuit, especially if the trapezoid has been working under load for a long time (for example, when the brushes freeze in winter).

Interesting fact: on Primera P11 with right-hand drive (for example, Japanese versions), the trapezoid of the wipers has a mirror design compared to left-hand drive models. This means that Trapezium parts from right-hand and left-hand drive cars are not interchangeable — when ordering spare parts, be sure to specify the side of the steering wheel!

How to diagnose a broken trapezius

Before proceeding with repair or replacement, it is necessary to accurately determine the cause of the malfunction. Diagnostics of trapezium wipers Nissan Primera P11 includes several steps:

1. Visual inspection:
   • Remove the plastic protection under the windshield (attached with 4–6 clips).
   • Check the integrity of the levers and rods for cracks or deformations.
   • Pay attention to traces of oil: smudges near the trapezoid shaft indicate wear of the oil seal.
2. Checking the backlash:
   • Manually swing the trapeze arms. Play of more than 1–2 mm indicates wear of the bushings.
   • Try turning the trapezoid shaft by hand - if it rotates with difficulty, the gearbox may break.
3. Motor test:
   • Disconnect the power connector from the motor and check the voltage at the terminals when the wipers are turned on (should be 12 V).
   • If there is voltage, but the motor does not work, the problem is in the motor itself. If there is no voltage, look for an open circuit or a faulty relay.

For more accurate diagnostics, you can use a multimeter:

• 🔋 Check the motor winding resistance (between terminals): it should be within 1.5–3 Ohm. Infinite resistance indicates a break.
• 🔌 Check the “ground” on the motor body - often oxidation of the contact leads to unstable operation.

⚠️ Attention! If you hear the sound of the motor running when you turn on the wipers, but the blades do not move, turn them off immediately. Continuing to operate in this mode may result in motor winding burnout or gearbox failure.

If you find that the problem lies in the mechanical part (play, cracks, gear wear), the trapezoid will have to be disassembled. In some cases, it is enough to replace individual elements (bushings, levers), but often it is easier to install a new trapezoid assembly - especially if the machine is operated in conditions of high humidity or frequent temperature changes.

Selection of spare parts: original vs analogues

When purchasing a trapezoid wiper for Nissan Primera P11 owners are faced with a dilemma: to take an original part or an analogue. Original trapezoid from Nissan has an article number 28530-4M000 (for left-hand drive models) and 28530-4M001 (for right-hand drive). However, it is becoming increasingly difficult to find it on sale, and the price can reach 8 000–12 000 ₽.

Alternative options:

Manufacturer	Article	Price (₽)	Features
Febi Bilstein	28530	4 500–6 000	High-quality plastic gears, but may require modification of the fasteners.
TRW	JTC1045	5 000–7 000	Good assembly, but sometimes there are defective bushings.
Ruville	52101	3 800–5 200	Budget option, but the resource is lower than the original.
Used	—	2 000–4 000	Risk of buying a worn part, but suitable as a temporary solution.

When choosing an analogue, pay attention to:

• 🔹 Gear material - metal or high-strength plastic are preferred.
• 🔹 Complete set — some kits do not have mounting bolts or bushings.
• 🔹 Steering wheel side — as already mentioned, trapezoids for left- and right-hand drive cars are not interchangeable!

If you decide to restore an old trapezoid, you can order individual components:

• 🔧 Bushing repair kit (article 28535-4M000) — 800–1 200 ₽.
• ⚙️ Reducer gear (article 28531-4M000) — 1 500–2 000 ₽.
• 🔌 Electric motor (article 28500-4M000) — 3 000–4 500 ₽.

⚠️ Attention! When purchasing a used trapeze, be sure to check the condition of the shaft seal. If it is worn out, oil from the gearbox will leak onto the electric motor, which will lead to its rapid failure.

Step-by-step instructions for replacing the windshield wiper trapezoid

Replacing the trapezoid with Nissan Primera P11 - a task of medium difficulty that will require patience and 基本工具 (basic tools). On average it takes to work 2–3 hours. Below are detailed instructions taking into account the nuances of this model.

Required tools:

• 🔧 Set of sockets and ratchet wrenches (10 mm, 12 mm, 14 mm).
• 🔨 Flat and Phillips screwdrivers.
• 🔗 Pliers and round nose pliers.
• 🛠️ Lubricant for joints (for example, LIQUI MOLY LM47).
• 🧴 Sealant for threaded connections (optional).

Work order:

1. Removing wipers and plastic protection:
   • Unscrew the nuts securing the wipers (usually 13 mm) and remove the brushes.
   • Using a screwdriver, carefully pry up the plastic protection under the windshield - it is attached to clips.
2. Disconnecting electrical wiring:
   • Disconnect the power connector from the trapezoid motor.
   • If your model has a rain sensor, disconnect its connector (located nearby).
3. Dismantling the old trapezoid:
   • Unscrew the three bolts securing the trapezoid to the body (12 mm And 14 mm).
   • Loosen the nut on the trapezoid shaft (you may need to hold the shaft with a wrench 17 mm).
   • Carefully remove the trapezoid through the opening under the windshield.
4. Installing a new trapeze:
   • Before installation, lubricate the hinges and bushings of the new trapezoid.
   • Place the trapezoid in place, lining up the bolt holes.
   • Tighten the fastening bolts, but do not tighten them completely - first you need to adjust the position of the brushes.
5. Adjustment and checking:
   • Reinstall the wipers and turn them on in test mode.
   • If necessary, adjust the position of the trapezoid so that the blades move synchronously and do not extend beyond the edge of the windshield.
   • Tighten all bolts and check the operation of the wipers at all speeds.

Pay special attention to the tightening torque of the trapezoid mounting bolts. If you overtighten, you can deform the plastic housing of the gearbox, which will lead to jamming. Optimal tightening torque - 10–12 Nm.

If the wipers do not work synchronously after replacement, additional adjustment may be required. To do this:

1. Loosen the nut on the trapezoid shaft.
2. Manually set the brushes to their lowest position.
3. Tighten the nut and check the synchronization of movement.

What to do if after replacement the wipers move jerkily?

This can be caused by several reasons:

1. Insufficient lubrication of the hinges - disassemble the trapezoid and reapply lubricant.

2. Play in new bushings - check the quality of the installed parts.

3. Problems with the electric motor - if jerking is accompanied by an unstable sound from the motor, the motor may be faulty.

4. Oxidation of contacts in the power circuit - clean the terminals and check the voltage with a multimeter.

Do-it-yourself trapezoidal wiper repair

If the trapezoid has not yet completely failed, it can be repaired. Most often, repairs come down to replacing worn bushings, gears or oil seals. Let's look at the process using an example Nissan Primera P11.

What you will need for repair:

• 🔧 Repair kit for bushings and oil seals (article no. 28535-4M000).
• 🛠️ Puller for retaining rings (if disassembly of the gearbox is required).
• 🧴 Lubrication ShRUS-4 or similar for high loads.
• 🔨 Set of screwdrivers and keys.

Step by step repair:

1. Disassembling the trapezoid:
   • Remove the trapeze from the machine (as described in the previous section).
   • Unscrew the gearbox cover mounting bolts (usually 3-4 bolts with a Phillips screwdriver).
   • Remove the plastic gear and inspect it for cracks or worn teeth.
2. Replacing bushings:
   • Press the old bushings out of the trapezoid arms using a mandrel or a suitable bolt.
   • Install new bushings after lubricating them.
   • Press the bushings in as far as they will go, making sure they are seated evenly.
3. Replacing the shaft seal:
   • Remove the retaining ring from the shaft (a puller will be required).
   • Carefully remove the old oil seal and install the new one, lubricating its edge.
   • Reinstall the retaining ring.
4. Assembly and testing:
   • Reassemble the gearbox, making sure that the gears mate without play.
   • Apply lubricant to all rubbing surfaces.
   • Install the trapeze on the machine and check its operation.

If the plastic gear of the gearbox is worn out, it can be replaced with a metal one from Febi or TRW - they are more durable. However, be aware that a metal gear can accelerate wear on the shaft if it is not perfectly aligned.

⚠️ Attention! When disassembling the gearbox, do not lose the small bearing balls - they often fall out when the cover is removed. If the balls are lost, the bearing will have to be completely replaced.

If you are not confident in your abilities, it is better to entrust the repair of the trapezoid to professionals. However, independent repairs will cost much less: for example, replacing bushings and oil seals in a workshop may cost 3 000–5 000 ₽, while the repair kit will cost 1 000–1 500 ₽.

Prevention and care of trapezium wipers

To trapezoid wipers Nissan Primera P11 lasted longer, follow simple recommendations:

• 💧 Use quality windshield wiper fluid — it reduces the load on the mechanism and prevents corrosion. Avoid water, especially in winter.
• ❄️ Do not turn on the wipers if they are frozen to the glass. - this can lead to gearbox failure or breakage of rods. Preheat the glass or carefully separate the brushes by hand.
• 🧴 Lubricate trapezoid joints regularly - 1-2 times a year is enough. Use molybdenum or graphite based lubricants.
• 🔧 Check the fastening of the wipers — loose nuts can cause vibration and accelerated wear of the bushings.
• 🚿 Wash your windshield and wipers — sand and dirt act as an abrasive, accelerating wear of both the brushes and the trapezoid mechanism.

Pay special attention to preparing for winter:

• 🔹 Replace summer brushes with winter ones - they cope better with ice and snow.
• 🔹 Check the condition of the hood seals - water getting on the trapezoid accelerates corrosion.
• 🔹 Apply a preservative lubricant to the trapezoid shaft (for example, WD-40 Specialist).

If you often drive off-road or in high humidity conditions, it is recommended to remove the plastic protection under the windshield once a year and clean the trapezoid from dirt. This will prevent the mechanism from jamming and extend its service life.

Frequently asked questions about trapezoidal wipers Nissan Primera P11

🔧 Is it possible to install a trapeze from another Nissan model?

Theoretically, trapezoids from Nissan Almera N15 (article 28530-6M000) and Nissan Sunny N14, but they require modification of the fastenings. Full interchangeability only with trapezoids from Primera P10 (first generation), but they are even less common.

⚡ Why do wipers only work at one speed?

This is a typical problem Primera P11associated with a malfunction wiper relay (located in the mounting block) or steering column switch. Also check the fuse F10 (10A) — he is responsible for powering the wiper circuit.

🛠️ How to remove the trapezoid shaft if it has turned sour?

If the shaft does not come out of the seat, use a penetrating lubricant (for example, WB-40) and light blows with a hammer through a wooden spacer. Do not use excessive force as this may damage the threads. In extreme cases, you will have to drill out the shaft and cut a new thread.

💰 How much does it cost to replace a trapezoid in the service?

The cost of working in a car service depends on the region:

• Moscow and St. Petersburg: 2 500–4 000 ₽.
• Regions: 1 500–2 500 ₽.

The price may increase if additional adjustments or replacement of related parts (for example, the wiper motor) are required.

🔄 Is it possible to repair a plastic gearbox?

Temporary repairs are possible using epoxy resin or "cold welding", but this is not a permanent solution. Plastic will still crumble over time. The best option is to replace the gear with a new one (preferably metal).