How do I remove and install the TR sensor on a transaxle on Kia Optima?

The TR sensor is on the transaxle top. Disconnect the negative battery terminal and remove the air filter housing. Disconnect the TR sensor's electrical connector and remove the shift control cable nut. Remove the control shaft lever and the TR sensor. To install, slide the TR sensor onto the manual valve shaft and loosely install the bolts. Install the lever and tighten the nut. Turn the lever to Park, then to Neutral. Connect the cable and install the nut. Align the lever and sensor holes, tighten the screws. Follow the removal steps in reverse to complete. Check the transmission and indicator operation.

Genuine Kia Optima Neutral Safety Switch

Transmission Neutral Safety Switch

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7 Neutral Safety Switches found

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Kia Optima Inhibitor Neutral Safety Switch
Part Number: 427003B700
$48.39 MSRP: $66.10
You Save: $17.71 (27%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Switch-Inhibitor; Neutral Safety Switch, Range Sensor
- Replaced by: 4270026700
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2014-2020 Kia Optima | 2.0L - Theta 2, 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Inhibitor Switch
Part Number: 427003B100
$48.39 MSRP: $66.10
You Save: $17.71 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Switch-Inhibitor
- Replaced by: 4270026700
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2014-2015 Kia Optima | 2.0L - Theta 2, 2.4L - Theta 2 | Sedan - 4Door 5P
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Kia Optima Inhibitor Neutral Safety Switch
Part Number: 4270026500
$48.39 MSRP: $66.10
You Save: $17.71 (27%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Switch-Inhibitor
- Replaced by: 4270026700
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2015 Kia Optima | 2.0L - Theta 2, 2.4L - Theta 2 | Sedan - 4Door 5P
View related parts
Kia Optima Inhibitor Neutral Safety Switch
Part Number: 427003B500
$48.39 MSRP: $66.10
You Save: $17.71 (27%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Switch-Inhibitor
- Replaced by: 4270026700
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2014-2015 Kia Optima | 2.0L - Theta 2, 2.4L - Theta 2 | Sedan - 4Door 5P
View related parts
Kia Optima Inhibitor Switch
Part Number: 4270039050
$63.22 MSRP: $86.37
You Save: $23.15 (27%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Switch-Inhibitor
- Manufacturer Note: NEW A/T
- Replaced by: 4270039055
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2010 Kia Optima | High Grade, Middle Grade | 2.4L, 2.4L - Theta 2, 2.4L - Theta FF, 2.5L, 2.7L, 2.7L - MU | 4 Door Sedan, Sedan - 4Door 5P
View related parts
Kia Optima Inhibitor Switch
Part Number: 4270026000
$48.39 MSRP: $66.10
You Save: $17.71 (27%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Switch-Inhibitor
- Replaced by: 4270026700
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2011-2013 Kia Optima | 2.0L - Theta 2, 2.4L - Theta 2 | Sedan - 4Door 5P
View related parts
Kia Optima Inhibitor Switch
Part Number: 4270039055
$59.85 MSRP: $86.37
You Save: $26.52 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Switch-Inhibitor; Neutral Safety Switch, Range Sensor
- Manufacturer Note: SELECTIVE USE
- Replaces: 4270039050
- Warranty: This genuine part is guaranteed by Kia's factory warranty.
Fits the following Vehicles:
- 2000-2010 Kia Optima | High Grade, Middle Grade | 2.4L, 2.4L - Theta 2, 2.4L - Theta FF, 2.5L, 2.7L, 2.7L - MU | 4 Door Sedan, Sedan - 4Door 5P

Kia Optima Neutral Safety Switch

Kia Optima Neutral Safety Switch allows the vehicle to start only when the shifter is in the park position or the neutral position, which prevents sudden jumps that could cause harm to people or property. The Neutral Safety Switch is installed in the starter circuit and detects the position of the gears and closes the electrical circuit whenever a drive range is engaged to ensure that the starter motor only receives power when the conditions are safe. This simple yet essential device eliminates the chance of the Optima moving as the engine is firing, and this is a feature that has been incorporated in Kia vehicles over the years. The information available indicates that there is only one design of the sedan, and therefore owners are faced with the same logic regardless of the date of production. As the key is turned, the Neutral Safety Switch promptly checks to ensure it is in park or neutral and closes its contacts to let the starter spin. When the switch malfunctions or falls out of alignment, the engine will not crank, and a Kia driver will have slowed down to check the Neutral Safety Switch rather than searching for bigger issues. Such a minor aspect is regularly known to make all Optima startups smooth and predictable as part of the trust Kia buyers have. Finally, the Neutral Safety Switch is an unobtrusive guardian over the Optima ignition path, and it stops unwanted motion before it starts.

If you're in search of top-notch, reasonably priced OEM Kia Optima Neutral Safety Switch, then you've found the perfect spot. Our website boasts an extensive inventory of Kia Optima Neutral Safety Switch, all priced at the market's premier price. Rest assured, every genuine part we offer comes with a warranty straight from the manufacturer.

Kia Optima Neutral Safety Switch Parts Questions & Experts Answers

Inhibitor Switch
4270039050
Q: How do I remove and install the TR sensor on a transaxle on Kia Optima?
A:
The TR sensor is on the transaxle top. Disconnect the negative battery terminal and remove the air filter housing. Disconnect the TR sensor's electrical connector and remove the shift control cable nut. Remove the control shaft lever and the TR sensor. To install, slide the TR sensor onto the manual valve shaft and loosely install the bolts. Install the lever and tighten the nut. Turn the lever to Park, then to Neutral. Connect the cable and install the nut. Align the lever and sensor holes, tighten the screws. Follow the removal steps in reverse to complete. Check the transmission and indicator operation.