2014-2018 Mazda 3 Rear Wiper Motor: A Guide for Japan-Built Hatchbacks

The Single Most Important Fact: Is Your Mazda 3 a Japan-Built Hatchback?

Before ordering this part, you must verify where your vehicle was manufactured. Check the VIN (Vehicle Identification Number) on your driver's side door jamb or at the base of the windshield.

• If the first character of the VIN is 'J', your car was built in Japan, and this part will fit (hatchback only).
• If the first character of the VIN is '3', your car was built in Mexico, and you need a different part (OEM part number BJT6-67-450).

Symptoms of a Failing Rear Wiper Motor

When the rear wiper motor begins to fail, the signs are usually obvious. Here’s what to look and listen for:

• Slow or Weak Operation: The wiper arm moves across the glass much slower than it used to, or seems to struggle. This is often the first sign of a dying motor or a seizing pivot shaft.
• No Movement at All: You activate the switch and nothing happens. This could be a completely dead motor, but it's also important to check the fuse first.
• Grinding or Humming Noises: Any unusual grinding, whirring, or humming sounds from the rear liftgate when the wiper is turned on points to worn or broken internal gears.
• Intermittent Function: The wiper works sometimes but not others. It may stop mid-swipe and start again later. This can indicate a loose electrical connection or a motor that is overheating and shutting down.
• Wiper Won't 'Park' Correctly: After you turn it off, the wiper stops in the middle of the window instead of returning to its resting position at the base of the glass. This points to a problem within the motor's internal park switch mechanism.
• Clicking Sound with No Movement: If you hear a clicking or ticking sound from the wiper pivot area but the arm doesn't move, the splines on the wiper arm or the motor's output shaft may be stripped.

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

While individual rear wiper motors can fail from wear and tear, there are no major recalls or TSBs issued by Mazda or the NHTSA specifically for the rear wiper motor on the 2014-2018 Mazda 3. However, there are two related issues in the same area of the vehicle you should be aware of:

• Front Wiper Recall: Mazda issued a recall (NHTSA ID 3219D) for the front windshield wipers on some 2016-2018 Mazda 3 vehicles. This was due to a faulty relay in the Front Body Control Module (F-BCM) and does not affect the rear wiper motor.
• Rearview Camera Recall: A recall was issued for the rearview camera on 2014-2018 Mazda 3 hatchbacks (NHTSA ID 23V-487). The wiring harness in the liftgate can become damaged, causing a flickering or distorted camera image. While this doesn't affect the wiper motor, the wiring runs in the same area, and it's a known issue for these models.

Buying a Used 2014-2018 Mazda 3 Rear Wiper Motor

A used OEM motor is an excellent, cost-effective choice, especially since this part is not a common high-failure item tied to a specific defect. Given the strict compatibility, buying a tested, used OEM part is often safer than buying a new aftermarket part that claims a universal fit.

1. Verify Your VIN: First and foremost, confirm your car is a Japan-built hatchback (VIN starts with 'J').
2. Match the Part Number: Ensure the used part is OEM number BHS2-67-450 or BHS267450.
3. Inspect the Connector: Look at the electrical connector pins on the used motor. They should be clean, straight, and free of any green or white corrosion.
4. Check the Output Shaft: Examine the splined metal shaft that the wiper arm mounts to. The splines should be sharp and well-defined, not worn down or stripped.
5. Ask About Mileage: While not a guarantee of lifespan, a motor from a lower-mileage vehicle is generally preferable.

Replacement Overview

Replacing the rear wiper motor is a beginner-friendly job that can be done with basic hand tools.

• Difficulty: 2 out of 5
• Estimated Time: 0.75 hours
• Tools Required: Socket set, plastic trim removal tools, flathead screwdriver.

The basic steps involve prying off the interior trim panel on the liftgate, disconnecting the wiper motor's electrical connector, removing the exterior wiper arm, and then unbolting the three bolts holding the motor in place. The new motor installs in the reverse order.

Frequently Asked Questions (FAQ)