TPMS Battery Dying? Here’s How to Replace Your Tire Pressure Sensor Battery

What is a TPMS Sensor?

A Tire Pressure Monitoring System (TPMS) sensor is a battery-powered electronic device mounted inside each tire on a vehicle.

TPMS sensors continuously monitor the air pressure levels in the tires and alert drivers if a tire becomes significantly under-inflated.

TPMS sensors contain pressure transducers that can detect when a tire’s pressure drops 25% or more below the vehicle manufacturer’s recommended level.

The sensor sends this data via a radio frequency (RF) signal to a receiver module in the vehicle.

The receiver then conveys the information to the driver through warning lights on the dashboard or other alerts.

Most TPMS sensors contain a small lithium battery to power their monitoring and data transmission functions.

Batteries are replaceable on TPMS sensors and generally need to be changed every 5-10 years to maintain proper operation.

Running on a depleted battery can lead to inaccurate pressure readings or failure to provide low-pressure warnings.

The purpose of TPMS is to promote proper tire inflation for safety, fuel efficiency, and tire life.

Under-inflated tires can overheat, increasing the chances of blowouts. TPMS provides an early alert to drivers so they can add air before a tire becomes dangerously under-pressurized on the road.

Keeping TPMS sensors powered with working batteries is critical for the system to work effectively.

Why Change TPMS Sensor Batteries?

TPMS sensors have batteries that need periodic replacement, usually every 5-7 years depending on the vehicle and battery type.

The sensor battery powers the TPMS sensor to monitor tire pressure and transmit readings to the vehicle computer. Over time, the battery will weaken and eventually die.

Signs of a failing TPMS sensor battery include inconsistent tire pressure readings, especially erratic readings when the vehicle first starts.

Drivers may also receive a TPMS warning light indicating an issue. As the battery further depletes, the sensor will stop transmitting data altogether.

It’s important to promptly replace dead TPMS batteries. Without a functioning sensor, the tire pressure monitoring system is useless.

Undetected tire underinflation can lead to reduced fuel economy, uneven tire wear, and blowouts.

Tire pressure that is too low also impacts vehicle handling and braking. Replacing the battery restores full TPMS functionality and prevents dangerous tire failures.

When to Replace TPMS Sensor Batteries

Tire pressure monitoring system (TPMS) sensors have batteries that need to be replaced periodically, usually every 5-10 years depending on the vehicle make and model.

The batteries inside TPMS sensors are designed to last around 5-7 years under normal driving conditions.

However, extreme weather and frequent tire rotations can impact battery life.

Most automakers recommend replacing TPMS sensor batteries every 5-7 years as preventative maintenance.

For example, GM and Chrysler recommend replacement at 5 years, while Toyota and Honda state that 6-7 years is ideal.

High mileage drivers may need to replace batteries more frequently, such as every 3-4 years once past 100k miles.

The tire pressure sensor battery replacement interval can vary significantly between different vehicle makes and models.

Luxury brands like BMW and Mercedes often use higher quality batteries that last 8-10 years.

For budget brands, batteries may only last 3-5 years before needing replacement. Checking your owner’s manual for the recommended interval is advised.

In general, TPMS sensor batteries should be replaced when the low tire pressure warning light comes on frequently or is no longer functioning.

Waiting too long increases the risk of sensor failure, which requires replacing the entire TPMS sensor unit.

Most mechanics recommend proactive battery replacement every 5-7 years as preventative maintenance to avoid more costly sensor repairs down the road.

TPMS Sensor Battery Replacement Cost

Replacing just the battery in a tire pressure monitoring system (TPMS) sensor can save money compared to replacing the entire TPMS sensor. Here are typical costs:

• TPMS sensor battery – $5 to $15 per battery. Many automotive retailers sell replacement batteries in the $10 range. High-end batteries with longer life expectancies cost more.
• Labor – $10 to $30 per tire. Most tire shops charge around $15 to change the battery in each TPMS sensor if you bring in just the tires/wheels. Full service costs more.
• Total for 1 tire – Around $20 to $45, assuming you supply the new battery.
• Full set of 4 – Expect to pay $80 to $180 for a full set of TPMS sensor battery replacements, not including the cost of high-end batteries. Going to a tire shop for dismount/mount and TPMS reset will be most expensive.

The convenience of getting a tire shop to replace all TPMS sensor batteries may be worth the extra cost over DIY.

But supplying your own batteries can save money. Overall, replacing just the batteries is far less costly than replacing entire TPMS sensors.

TPMS Sensor Battery Types

There are a few common battery types used in TPMS sensors:

• OEM Batteries: These are the original batteries that come installed from the manufacturer. They are often lithium batteries like CR1632 or CR2032. OEM batteries tend to have the longest lifespan.
• Aftermarket Batteries: These are replacement batteries you can purchase from auto parts stores or online retailers. The most common aftermarket options are alkaline batteries like A76 or LR44. Aftermarket batteries are cheaper but don’t last as long as OEM.
• Lithium vs Alkaline: Lithium batteries like CR1632 are recommended for TPMS sensors because they have a longer lifespan, work better in cold weather, and hold a charge longer when not being used. Alkaline batteries like LR44 are cheaper but drain faster, especially in cold weather. Lithium batteries can last up to 10 years while alkaline may only last 1-3 years.
• Other Sizes: Less common battery sizes sometimes used in TPMS sensors include CR2450, CR2330, and CR2477. Check your vehicle specs to see which battery size you need. The CR1632 and CR2032 lithium batteries are the most widely used.

So in summary, OEM lithium batteries like CR1632 tend to be the best option for longevity, but aftermarket alkaline batteries can work in a pinch if you need a cheaper alternative. Just expect to replace them more frequently.

DIY TPMS Battery Replacement

Replacing the battery in a TPMS sensor is a moderately difficult DIY project that requires some mechanical skills and special tools. Here are the key steps:

Difficulty Level

• Moderate difficulty. This is not an easy beginner project but is manageable for someone with basic auto repair skills.

Required Tools

• TPMS sensor activation tool
• Small standard and Phillips screwdrivers
• Pliers
• Gasket sealant
• Replacement batteries – CR1632 or CR1616

Step-by-Step Instructions

1. Remove the tire from the wheel and deflate it completely.
2. Locate the TPMS sensor on the inside of the wheel. There may be a rubber gasket covering it.
3. Remove the valve stem cap and use the activation tool to deactivate the sensor.
4. Remove the sensor cover screws using a Phillips screwdriver. There may be 1-3 screws.
5. Carefully pry the sensor cover open using a small flathead screwdriver. Don’t damage the gasket.
6. Remove the old battery using pliers and insert the new battery with the positive side facing out.
7. Apply gasket sealant if needed and reassemble the sensor cover. Tighten screws firmly.
8. Reinstall the tire, inflate to proper PSI, and activate the sensor using the activation tool.
9. Take the old battery to a recycling center – do not throw it in the trash!

With the right tools and care, DIY TPMS battery replacement can be done safely. Using a shop is recommended if you’re not comfortable with the process.

TPMS Sensor Battery Replacement Services

Many drivers choose to have their TPMS sensor batteries replaced by professionals rather than doing it themselves. There are a few options for having this service done:

Auto Repair Shops

Most general auto repair shops can replace TPMS sensor batteries. They will have the required tools and expertise.

Prices can vary from shop to shop but expect to pay $25-60 per sensor. Many shops offer coupons and discounts. Call around for quotes.

Auto repair chains like Midas, Meineke, and Firestone also provide TPMS battery replacement services.

Dealerships

You can always take your vehicle to the dealership to have the TPMS sensor batteries replaced.

Dealerships employ factory-trained technicians and have OEM parts readily available.

However, dealers tend to be the most expensive option, with costs ranging from $50-150 per sensor. Always request a price quote beforehand.

Mobile Tire Service Providers

Some tire service providers like Discount Tire Direct can come to your home or workplace to replace TPMS batteries.

This offers convenience without needing to go to a shop. Mobile installation costs are about the same as auto repair shops.

Check providers in your area to compare pricing. There may be a mobile visit fee on top of the sensor replacement cost.

Having the professionals replace your TPMS sensor batteries gives you peace of mind.

Technicians have the skills, equipment, and experience to efficiently swap the batteries and reset the sensors.

Just be aware that you’ll pay more compared to a DIY battery replacement.

TPMS Sensor Battery Reset

After replacing the battery in a TPMS sensor, you’ll need to reset and recalibrate the sensor so it works properly with your vehicle. Here are the steps to follow:

Required Tools

• TPMS reset tool
• Diagnostic scan tool
• Air pressure gauge

Reset Process

1. Inflate all tires to the manufacturer’s recommended pressure level. Use an accurate tire pressure gauge to check pressures.
2. Activate the TPMS reset function using a reset tool or diagnostic scan tool. The process varies by vehicle make and model. Consult the owner’s manual for specifics.
3. Drive the vehicle for 10-20 minutes, allowing the TPMS sensors to synchronize with the receiver. Drive above 25 mph for best results.
4. Recheck tire pressures and adjust if needed. The TPMS light should turn off once pressures are set correctly.
5. If the light stays on, repeat the reset process. There may be a problem with a sensor if the light persists.
6. Perform an OBDII diagnostic scan to confirm all TPMS sensors are transmitting properly after the reset procedure.

Resetting the TPMS system after a battery replacement is crucial to restore proper functionality.

Follow the automaker’s recommended reset procedure carefully. Diagnose any problems to ensure the newly installed batteries and sensors are operating as intended.

TPMS Sensor Battery Disposal

Proper disposal of TPMS sensor batteries is important for environmental safety. The batteries contain heavy metals and toxic chemicals that can contaminate soil and groundwater if not disposed of properly.

Here are some guidelines for TPMS sensor battery disposal:

• Do not throw old TPMS batteries in the trash. They should always be recycled or disposed of through a hazardous waste collection program. Throwing them in the garbage can allow heavy metals to eventually reach landfills and leak into the environment.
• Take used TPMS batteries to a battery recycling location or hazardous waste collection site. Many auto parts stores, retailers, and local recycling centers will accept and properly recycle old batteries.
• Some states and counties have laws prohibiting the disposal of batteries in landfills and requiring recycling. Check your local regulations for proper disposal methods in your area.
• Use a battery storage container when collecting used TPMS batteries for recycling. This prevents damage and corrosion before you can take them in for recycling.
• Completely tape the terminals or ends of batteries before disposal to prevent fires from occurring.
• Never burn or incinerate lithium batteries yourself, as this causes toxic fumes. Disposal by incineration should only be done at an approved hazardous waste facility.

Recycling TPMS batteries allows heavy metal components like lithium, mercury, cadmium, and lead to be reclaimed and prevents those toxins and hazardous materials from damaging the environment.

Proper disposal also reduces the need for new raw material mining for battery production. By taking a few simple steps, drivers can help ensure safe, responsible TPMS sensor battery disposal.

When to Replace Full TPMS Sensor

In most cases, simply replacing the battery in a TPMS sensor will restore its functionality.

However, there are some instances where the entire TPMS sensor may need to be replaced instead of just the battery:

• Sensor is Damaged or Corroded: If the sensor has become damaged from impact or shows signs of water corrosion, it likely needs to be fully replaced. A damaged or corroded sensor cannot be restored by just replacing the battery.
• Sensor is Over 7-10 Years Old: TPMS sensors have a finite lifespan and will eventually fail even with new batteries. If your sensor is over 7-10 years old, it’s a good idea to just replace the entire unit.
• Inaccurate Readings Persist: If you’ve replaced the sensor battery but are still getting inaccurate or intermittent tire pressure readings, the sensor itself is probably faulty and needs replacement. Swapping batteries again likely won’t fix an underlying issue.
• No Signal Detected: If your TPMS light stays on indicating no sensor signal despite new batteries, the sensors themselves may be dead and require replacement. The new batteries can’t transmit signals if the electronics have failed.
• Air Leaks Persist: If you have an ongoing tire air leak issue that persists after replacing TPMS batteries, there may be a problem with the sensor seals. Replacing the faulty sensor can resolve persistent air leaks.

In summary, if battery replacement doesn’t restore normal TPMS sensor function, or if the sensors are damaged or too old, replacing the entire TPMS unit is likely the solution.

Swapping batteries is the first step, but degraded sensors may ultimately need a full replacement.