Technical Bulletin
Model(s)

Year

Eng. Code

Trans. Code

VIN Range From

VIN Range To

Routan

2013

All

All

All

All

Condition
19 13 02 March 14, 2013 2033265
Release of New Engine Coolant Organic Additive Technology (OAT)

Technical Background
New engine coolant for the 2013 model year Routan vehicles and beyond, for all engine applications.
This new coolant is an Organic Additive Technology (OAT) (Fig. 1). OAT coolants have a service interval of 10
years or 150,000 miles. For extreme duty cycle applications refer to the Service Information or Owner's Manual for
proper maintenance schedules

Production Solution
Coolant change from HOAT to OAT MY2013.

Service
WARNING:
Vehicle damage may occur if dissimilar coolants are mixed!

Coolants of different technologies are not compatible nor interchangeable (OAT, HOAT or IAT).
Mixing these coolants could result in:
• Accelerated corrosion within the engine and cooling systems.
• Coolant having an ammonia smell.
• Debris (particles) floating in the coolant.
Further inspection by the technician may find corrosion in the system. This could show up as aluminum pipes
turning black in the coolant system, engine overheat, or leaks in the coolant system.

Page 1 of 3
© 2013 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other
intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice.
No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or
otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the publisher.

Technical Bulletin
Note:
If OAT (VW- G 0120021G Purple) has been mixed with HOAT (VW- GUS012001G1 / G 0120011G Pink (Fig. 2)
or Factory Fill HOAT Orange (Fig. 3) or any other coolants have been mixed, it will be necessary to flush the
cooling system.
Note:
Part number GUS012A0101 / GUS012A011O Hybrid Organic Anti Corrosive additive is for HOAT coolants only,
and IS NOT compatible with OAT.

VW- G 0120021G Purple OAT
Model Years 2013 Forward

Fig. 1 Purple OAT Coolant

VW- GUS012001G1 / G 0120011G Pink
HOAT
Model Years 2000 to 2012

Fig. 2 Pink HOAT Coolant

Page 2 of 3
© 2013 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other
intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice.
No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or
otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the publisher.

Technical Bulletin
Factory Fill HOAT
Model Years 2000 to 2012

Fig. 3 Orange HOAT Coolant

Warranty
Information only.

Required Parts and Tools
No Special Parts required.
No Special Tools required.

Additional Information
All part and service references provided in this Technical Bulletin are subject to change and/or removal.
Always check with your Parts Dept. and Repair Manuals for the latest information.

Page 3 of 3
© 2013 Volkswagen Group of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other
intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice.
No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or
otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the publisher.