Engine & fuel system
1 documented fault — symptoms, causes and workshop fixes.
Engine coolant leak from throttle body area
Cause
Poor manufacture of throttle body.
Repair
- Fit modified throttle body.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Throttle body | 22030-37040 | 1 |
Data: Motorwise Workshop. Bulletin 1.
Electrical & ignition
1 documented fault — symptoms, causes and workshop fixes.
Rattling/clicking noise from partially open window whilst driving
Cause
Poor manufacture of window winder mechanism.
Repair
- Fit modified window winder mechanism(s)as necessary.
Parts8 parts
| Part | Part number | Qty |
|---|---|---|
| Front window winder mechanism - RH (→01/23) | 69810-02721 | 1 |
| Front window winder mechanism - LH (→01/23) | 69820-02741 | 1 |
| Rear window winder mechanism - RH (→01/23) | 69830-02681 | 1 |
| Rear window winder mechanism - LH (→01/23) | 69840-02681 | 1 |
| Front window winder mechanism - RH (01/23→) | 69810-02722 | 1 |
| Front window winder mechanism - LH (01/23→) | 69820-02742 | 1 |
| Rear window winder mechanism - RH (01/23→) | 69830-02682 | 1 |
| Rear window winder mechanism - LH (01/23→) | 69840-02682 | 1 |
Data: Motorwise Workshop. Bulletin 3.
Suspension & drivetrain
1 documented fault — symptoms, causes and workshop fixes.
Knocking noise from front suspension when driving over rough roads or speed humps
Cause
Unsatisfactory design of front anti-roll bar bushes.
Repair
- Fit modified front anti-roll bar bushes.
Parts1 part
| Part | Part number | Qty |
|---|---|---|
| Front anti-roll bar bush | 48815-10130 | 2 |
Data: Motorwise Workshop. Bulletin 2.
Glossary
Technical terms used in this guide.
- Anti-Roll Bar
- A bar that links the left and right suspension to cut body roll in corners
- Bushes
- Rubber mountings that let a suspension or body joint move without metal-to-metal contact
Frequently asked questions
What are the common faults with the Toyota Corolla 1.6 Valvematic?
This guide contains three workshop bulletins for the Toyota Corolla 1.6 Valvematic. Of these, one concerns the engine and fuel system and one the electrical and ignition. Symptoms, causes, repair steps and part numbers are shown where supplied.
Does every Toyota Corolla 1.6 Valvematic have these faults?
No. These are patterns documented across the model by workshops, not predictions for an individual vehicle. Where a fault applies only to certain vehicles or VIN ranges, that is listed with the fault.
Can I check for Toyota Corolla 1.6 Valvematic faults myself?
Many of them. The documented symptoms can be seen, heard or felt during a test drive.