Enter Vehicle Year Make Model

Specify your vehicle's year, make and model to guarantee fit.

Year
Make
Model
Options
Drivetrain

2021 Toyota 4Runner Engine & Engine Management

What year is your
Free Same Day Shipping

2021 Toyota 4Runner Engine & Engine Management

Filter Results
  • Notify When Available

    VIDEO

    Spark Plug Set

    Replaces 2021 Toyota 4Runner V6 4.0L 6 Piece Spark Plug Set TRQ SPA02135

    8 reviews
    Brand: TRQ
    - SPA02135

    • Spark Plug Type: Iridium
    • Quantity: 6 Piece
    • Kit Includes: (6) Spark Plugs
    $54.95
    Save 14%
    List $63.95 Save $9.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

    Replaces 2021 Toyota 4Runner V6 4.0L 6 Piece Spark Plug Set TRQ SPA02135

    VIDEO

    Spark Plug Set
    8 reviews
    Brand: TRQ - SPA02135
    • Spark Plug Type: Iridium
    • Quantity: 6 Piece
    • Kit Includes: (6) Spark Plugs
    $54.95
    Save 14%
    List $63.95 Save $9.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

  • Notify When Available

    VIDEO

    Serpentine Belt Idler Pulley

    Replaces 2021 Toyota 4Runner Upper Serpentine Belt Idler Pulley TRQ BPA04031

    3 reviews
    Brand: TRQ
    - BPA04031

    $29.95
    Save 14%
    List $34.95 Save $5.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

    Replaces 2021 Toyota 4Runner Upper Serpentine Belt Idler Pulley TRQ BPA04031

    VIDEO

    Serpentine Belt Idler Pulley
    3 reviews
    Brand: TRQ - BPA04031
    $29.95
    Save 14%
    List $34.95 Save $5.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

  • Notify When Available

    VIDEO

    00 MB E320; 03-12 Lexus, Pontiac, Scion, Toyota Multifit w/1.5L- 5.7L Engine Knock Sensor

    Replaces 2021 Toyota 4Runner Engine Knock Sensor TRQ ESA94884

    23 reviews
    Brand: TRQ
    - ESA94884
    $33.95
    Save 15%
    List $39.95 Save $6.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

    Replaces 2021 Toyota 4Runner Engine Knock Sensor TRQ ESA94884

    VIDEO

    00 MB E320; 03-12 Lexus, Pontiac, Scion, Toyota Multifit w/1.5L- 5.7L Engine Knock Sensor
    23 reviews
    Brand: TRQ - ESA94884
    $33.95
    Save 15%
    List $39.95 Save $6.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

  • Notify When Available

    VIDEO

    Serpentine Belt Idler Pulley

    Replaces 2021 Toyota 4Runner Lower Serpentine Belt Idler Pulley TRQ BPA04170

    3 reviews
    Brand: TRQ
    - BPA04170

    $34.95
    Save 29%
    List $48.95 Save $14.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

    Replaces 2021 Toyota 4Runner Lower Serpentine Belt Idler Pulley TRQ BPA04170

    VIDEO

    Serpentine Belt Idler Pulley
    3 reviews
    Brand: TRQ - BPA04170
    $34.95
    Save 29%
    List $48.95 Save $14.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

  • Notify When Available

    VIDEO

    Coolant Temperature Sensor

    Replaces 2021 Toyota 4Runner Coolant Temperature Sensor TRQ ESA70939

    2 reviews
    Brand: TRQ
    - ESA70939
    $21.95
    Save 19%
    List $26.95 Save $5.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

    Replaces 2021 Toyota 4Runner Coolant Temperature Sensor TRQ ESA70939

    VIDEO

    Coolant Temperature Sensor
    2 reviews
    Brand: TRQ - ESA70939
    $21.95
    Save 19%
    List $26.95 Save $5.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

  • Notify When Available

    VIDEO

    Ignition Coil

    Replaces 2021 Toyota 4Runner V6 4.0L Ignition Coil TRQ ICA61776

    9 reviews
    Brand: TRQ
    - ICA61776

    • Ignition Coil Type: Direct Replacement
    • Ignition Coil Color: Black
    $46.95
    Save 19%
    List $57.95 Save $11.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

    Replaces 2021 Toyota 4Runner V6 4.0L Ignition Coil TRQ ICA61776

    VIDEO

    Ignition Coil
    9 reviews
    Brand: TRQ - ICA61776
    • Ignition Coil Type: Direct Replacement
    • Ignition Coil Color: Black
    $46.95
    Save 19%
    List $57.95 Save $11.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

  • Notify When Available
    Kit image

    Replaces 2021 Toyota 4Runner V6 4.0L 6 Piece Performance Ignition Coil Set TRQ Performance ICA70994

    3 reviews
    Brand: TRQ Performance
    - ICA70994

    • Ignition Coil Color: Red
    • Quantity: 6 Piece
    • Kit Includes: (6) Performance Ignition Coils
    • Ignition Coil Type: Performance
    $179.95
    Save 37%
    List $284.95 Save $105.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

    Replaces 2021 Toyota 4Runner V6 4.0L 6 Piece Performance Ignition Coil Set TRQ Performance ICA70994

    Kit image
    3 reviews
    Brand: TRQ Performance - ICA70994
    • Ignition Coil Color: Red
    • Quantity: 6 Piece
    • Kit Includes: (6) Performance Ignition Coils
    • Ignition Coil Type: Performance
    $179.95
    Save 37%
    List $284.95 Save $105.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

  • Notify When Available

    VIDEO

    Ignition Coil Boot Set

    Replaces 2021 Toyota 4Runner V6 4.0L 6 Piece Ignition Coil Boot Set TRQ ICA30411

    Brand: TRQ
    - ICA30411

    • Quantity: 6 Piece
    • Kit Includes: (6) Ignition Coil Boots
    $19.95
    Save 41%
    List $33.95 Save $14.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

    Replaces 2021 Toyota 4Runner V6 4.0L 6 Piece Ignition Coil Boot Set TRQ ICA30411

    VIDEO

    Ignition Coil Boot Set
    Brand: TRQ - ICA30411
    • Quantity: 6 Piece
    • Kit Includes: (6) Ignition Coil Boots
    $19.95
    Save 41%
    List $33.95 Save $14.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

  • Notify When Available

    VIDEO

    Ignition Kit

    Replaces 2021 Toyota 4Runner 12 Piece Ignition Kit TRQ TKA51459

    Brand: TRQ
    - TKA51459

    • Kit Includes: (6) Spark Plugs
    • Quantity: 12 Piece
    • Kit Includes: (6) Ignition Coil Boots
    $64.95
    Save 19%
    List $79.95 Save $15.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

    Replaces 2021 Toyota 4Runner 12 Piece Ignition Kit TRQ TKA51459

    VIDEO

    Ignition Kit
    Brand: TRQ - TKA51459
    • Kit Includes: (6) Spark Plugs
    • Quantity: 12 Piece
    • Kit Includes: (6) Ignition Coil Boots
    $64.95
    Save 19%
    List $79.95 Save $15.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

  • Notify When Available

    VIDEO

    Coolant Temperature Sensor

    Replaces 2021 Toyota 4Runner Coolant Temperature Sensor TRQ ESA19561

    1 reviews
    Brand: TRQ
    - ESA19561
    $23.95
    Save 25%
    List $31.95 Save $8.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

    Replaces 2021 Toyota 4Runner Coolant Temperature Sensor TRQ ESA19561

    VIDEO

    Coolant Temperature Sensor
    1 reviews
    Brand: TRQ - ESA19561
    $23.95
    Save 25%
    List $31.95 Save $8.00

    Guaranteed to Fit 2021 Toyota 4Runner

    Guaranteed to Fit 2021 Toyota 4Runner

1

...

1 2

...

2
Close



Toyota is a registered trademark of Toyota Motor Corporation. 1A Auto is not affiliated with or sponsored by Toyota or Toyota Motor Corporation. See all trademarks.
Same Day Shipping

Need your part faster? Choose expedited shipping at checkout.

Guaranteed To Fit

Highest quality, direct fit replacement auto parts enforced to the strictest product standards.

USA Customer Support

Exceeding customers' expectations, our team of passionate auto enthusiasts are here to help.

Instructional Video Library

Thousands of how-to auto repair videos to guide you step-by-step through your repair.

Go To Top
Specify your vehicle

Specify your vehicle's year, make and model to guarantee fit.

Year
Make
Model
Options
Drivetrain

If your vehicle isn't listed, close the window to return to search.