AMA9 – Rear Axle Lock Nuts May Break – 2021 Porsche Cayenne

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Technical Information
Service
72/21 ENU AMA9 4
AMA9 – Replacing Threaded Connections on Rear Trailing Arm (Stop Delivery/Recall
Campaign)
Revision: This bulletin replaces bulletin Group 4 72/21 AMA9, dated June 9, 2021.
Model Year: 2021
Model Line: Cayenne (9YA)/Cayenne Coupé (9YB)
Concerns: Rear-axle trailing arms
Information: There is a possibility that clamping nuts that were notmanufactured within the specified
parameters were installed on the rear-axle trailing arms on the affected vehicles.
This can result in stress corrosion cracking on the clamping nuts, which may cause the clamping nuts to
break over the service life of the vehicle. A broken clamping nut can result in increased play between the
trailing arm and wheel carrier and as a result, vehicle handling may suddenly be impaired.
Action required: Replace clamping nuts on the rear-axle trailing arms.
Affected
Vehicles:
Only vehicles assigned to the campaign (see also PCSS Vehicle Information). This campaign affects
1,568 vehicles.
AfterSales Jan 26, 2022
Page 1 of 6
Service 4 AMA9 ENU 72/21
Technical Information
Installation
Position:
Installation position of trailing arm
Parts required
Part Info: Part No. Designation Qty.
PAF010234  Lock nut, M14 x 1.5 4
Required tools
Tools: • Torque wrench 2 – 10 Nm(1.5 – 7.5 ftlb.), e.g. VAG 1783 torque wrench, 2-10 Nm(1.5-7.5 ftlb.)
• Electronic torque angle torque wrench, 20-400 Nm (15-296 ftlb.), e.g. VAS 6942 Torque angle
torque wrench, 20-400 Nm (15-296 ftlb.)
• Rear Eccentric Socket, PNA 721E3, Info: https://ppn.porsche.com/portal/docs/DOC-325933
All other required (special) tools in accordance with the linked Workshop Manuals depending on the
relevant assigned scope.
Jan 26, 2022
Page 2 of 6 AfterSales
Technical Information
Service
72/21 ENU AMA9 4
Replacing clamping nuts on the rear left and right trailing arms
Work Procedure: 1 Move the vehicle onto a lifting platform and raise it.  Workshop Manual ‘4X00IN Lifting the vehicle’
2 Remove rear wheel at the left and right.  Workshop Manual ‘440519 Removing and installing
wheel’
3 Visually check the clamping nuts on the rear left and right trailing arms and replace clamping
nuts:
3.1 Before removing the clamping nuts, perform a visual inspection to see whether there are
stress cracks similar to those shown in the illustration  Stress cracks on clamping nuts
-Arrows- or whether the clamping nut is broken, loose or missing.
Stress cracks on clamping nuts
• Ifyouseeno sign of damage at the clamping nut, only the clamping nut must be
replaced. Todo this, continue with Step 3.2.
• Iftheclamping nut is damaged or if the clamping nut has come loose or was
lost, get in touch with your contact person atTechnical Support to agree on
how to proceed. In this case, a PRMS ticket for repair approval must be sent to
PAG_Support_Campaign_TI_SY.
For warranty processing for damaged or loose clamping nuts, see General information on
warranty processing under  Technical Information ‘440519 Warranty processing’.
AfterSales Jan 26, 2022
Page 3 of 6
Service 4 AMA9 ENU 72/21
Technical Information
Trailing arms – vehicles without air suspension
• Item 1 – Trailing arm
• Item 2 – Eccentric fastening screw
• Item 3 – Eccentric clamping nut
• Item 4 – Clamping nut on wheel carrier
• Item 5 – Fastening screw for wheel carrier
3.2 Using lifting equipment, raise the wheel suspension as far as necessary so that the screws of
the trailing arm Trailing arms – vehicles without air suspension -1- can be loosened.
For instructions, see:
 Workshop Manual ‘421119 Removing and installing trailing arm’
Information
When replacing the clamping nuts, please observe the following instructions rather than the
procedure specified in the Workshop Manual:
• Thefastening screw (expansion screw) on the wheel carriermust be re-used. It has
been checked and approved for re-use one time only in this specific case.
3.3 Before loosening the eccentric screws, mark the eccentric position. Mark the position of the
eccentric screws Trailing arms – vehicles without air suspension -2+3- on both sides using
a pen.
3.4 Unscrew clamping nut securing trailing arm Trailing arms – vehicles without air suspension
-3- to rear axle housing and counter at fastening screw Trailing arms – vehicles without air
suspension -2- at the same time.
3.5 Screw on new clamping nut  Trailing arms – vehicles without air suspension -3-.
Tightening torque 140 Nm(104 ftlb.)
Jan 26, 2022
Page 4 of 6 AfterSales
Technical Information
Service
72/21 ENU AMA9 4
3.6 Loosen fastening screw Trailing arms – vehicles without air suspension -5- securing
trailing arm to wheel bearing housing by 1-2 turns and counter at the clamping nut Trailing
arms – vehicles without air suspension -4- at the same time.
Then, hold the fastening screw Trailing arms – vehicles without air suspension -5- firmly
and unscrew the clamping nut  Trailing arms – vehicles without air suspension -4-.
3.7 Screw on new clamping nut  Trailing arms – vehicles without air suspension -4- as far as it
will go on the trailing arm.
3.8 Tighten fastening screw Trailing arms – vehicles without air suspension -5- only in zero
position to prevent warping in the bearings. Counter at the new clamping nut Trailing arms
– vehicles without air suspension -4- while doing this.
Initial tightening 130 Nm(96 ftlb.) Final tightening +180°
4 Install rear wheel at the left and right.  Workshop Manual ‘440519 Removing and installing wheel’
5 Lower the vehicle and remove it from the lifting platform.
6 Enter the campaign in the Warranty and Maintenance booklet.
End of action required
Warranty processing
General information on warranty processing
The scope of this measure includes only the clamping nuts and the work required for replacing the
clamping nuts.
If the result of the check is negative, further work and the parts required are not included in the scope
and must be entered afterwards.
The incurred labor costs and the additional cost of parts required over and above this scope
must then be invoiced using an appeal for credit to the original campaign claim line for this campaign.
Information
The specified working times were determined specifically for carrying out this campaign and include all
required preliminary and subsequent work.
The working times may differ from the working times published in the Labor Operation List in PCSS.
AfterSales Jan 26, 2022
Page 5 of 6
Service 4 AMA9 ENU 72/21
Technical Information
Required part numbers: Designation Qty.
PAF010234 Lock nut, M14 x 1.5 4 ea.
 Damage Code AMA9 099 000 2
Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training
courses. They are written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special
tools may be necessary in order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the
safe operation of your vehicle, and may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and
safely. Part numbers listed in these bulletins are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a
discrepancy, the work procedures in the PIWIS Tester are the ones that must be followed. © 2022 Porsche Cars North America, Inc.
Jan 26, 2022
Page 6 of 6 AfterSales
Scope 1:
Replacing threaded connections on rear trailing arm
Includes: Removing and installing rear wheel, left and right
Performing front and rear suspension alignment
Adjusting vehicle at front and rear
Labor time: 290 TU

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AMA9 Stop Delivery / Recall Campaign – Replacin… | PPN Portal
AMA9 Stop Delivery / RecallCampaign – Replacing threadedconnections on rear trailing arm
IT IS A VIOLATION OF FEDERAL LAW FOR DEALERS TO DELIVER TOCUSTOMERS NEW VEHICLES IN THEIR INVENTORY AFFECTED BYTHIS NOTIFICATION UNTIL THESE VEHICLES ARE REMEDIED.DEALERS SHOULD NOT SELL, LEASE, RENT, OR LOAN ANY NEW ORUSED VEHICLES IN DEALER INVENTORY AFFECTED BY THIS
IMPORTANT REMINDER
AMA9 Stop Delivery/Recall campaign – Replacingthreaded connections on rear trailing arm
AMA9 Stop Delivery / Recall Campaign – Replacin… | PPN Portal
Porsche Mobility
Warranty processing
Parts required
Overview
NOTIFICATION PRIOR TO REMEDY. DEALERS GROUNDING LEASERETURNS SHOULD REMEDY ALL AFFECTED GROUNDED VEHICLES.
There is a possibility that lock nuts on the rear axle trailing arms may break due to stress corrosion.
A broken lock nut may misalign the rear axle, causing a loss of control.
To avoid this, the lock nuts on the rear axle trailing arms must be replaced with nuts manufactured tospecifi cation.
Please arrange for this measure to be carried out on the aff ected vehicles immediately.
Model type
Cayenne (9YA/9YB)
Model year
2021
Number
1,568
Part No.
Designation
Quantity/vehicle
Parts return
PAF010234
Hexagon nut
4 ea.
No
Ordering required parts
Parts may be ordered as required without the need for a PRMS ticket, at up to 50% of UIO (seeattached spreadsheet for aff ected VINs). Please do not over-order, leaving other dealers withoutsuffi cient quantities.
Replacing clamping nuts on the rear trailing arm
Scope 1:
Damage code
AMA9
99 000
Repair code
2
Working time
71 TU
AMA9 Stop Delivery / Recall Campaign – Replacin… | PPN Portal
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Further information
If requested, the mobility of the aff ected customer can be assured by off ering a suitable replacementvehicle.
Please invoice this additional service with the campaign scope via WWS.
Work instruction
TI No. 72/21, Group 4, Service, AMA9
Vehicle list and allocation
See PCSS or attached list for reference
Technical Information
See PCSS or
forreference
Aft ersales Document Database
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General Reimbursement Plan of Porsche Cars North America. Inc.
Porsche Cars North America, Inc. (“PCNA”) submits the following general reimbursement plan in accordance
with 49 U.S.C. § 30120(d) and 49 C.F.R § 573.6(c)(8)(i) to reimburse owners and purchasers for costs incurred for
remedies in advance of PCNA’s notification of safety-related defects and noncompliance with Federal Motor Vehicle
Safety Standards under subsection (bl or (cl of 49 U.S.C. § 30118 (“the Plan”).
1. Reimbursement Period.
a. The beginning date for reimbursement shall be determined as follows:
(i) For a noncompliance with a Federal Motor Vehicle Safety Standard, the beginning date for
reimbursement shall be the date of the first test or observation by either NHTSA or the
manufacturer indicating that a noncompliance may exist.
(ii) For a safety-related defect that is determined to exist following the opening of an
Engineering Analysis (EA) by NHTSA’s Office of Defects Investigation (001), the beginning
date for reimbursement shall be the date the EA was opened, or one (1) year before the
date of PCNA’s notification to NHTSA pursuant to 49 C.F.R. § 573.6, whichever is earlier.
(iii) For a safety-related defect that is determined to exist in the absence of the opening of an
EA, the beginning date for reimbursement shall be one (1) year before the date of PCNA’s
notification to NHTSA pursuant to 49 C.F.R § 573.6.
b. The ending date for reimbursement shall be ten (10) calendar days after the date on which PCNA
mailed the last of its owner notifications pursuant to 49 C.F.R. Part 577.
c. PCNA may choose to extend the reimbursement periods for a particular recall in its discretion.
2. Reimbursement Conditions.
PCNA will reimburse owners and purchasers for pre-notification repair or replacement subject to the
following conditions:
a. PCNA will not reimburse for costs incurred within the period during which a PCNA original or a PCNA
issued extended warranty would have provided for a free repair without any payment by the
consumer of the defect addressed by the recall unless (i) the customer submitted the vehicle to a
franchised dealer or authorized representative of PCNA, who then denied warranty coverage or (ii)
the repair made under warranty did not remedy the defect addressed by the recall. Any warranty
covered by this subsection must be in writing.
b. PCNA will not reimburse owners or purchasers:
(i) If the pre-recall notification repair was not of the same type (repair, replacement or refund
of purchase price) as the recall remedy;
(ii) If the pre-recall notification repair did not address the defect or noncompliance that led to
the recall or a manifestation of the defect or noncompliance; or
(iii) If the pre-recall notification repair was not reasonably necessary to correct the defect or
noncompliance that led to the recall or a manifestation of the defect or noncompliance.
However, nothing stated in subsection 2.b shall require that the pre-recall notification repair be identical to the recall
remedy.
3. Amount of Reimbursement.
The amount of reimbursement shall be limited to out of pocket costs incurred by the owner of the vehicle at
the time of the pre-recall notification repair as set forth below:
4.
a. For parts, labor, and miscellaneous fees such as disposal of waste and taxes for the pre-recall
notification repair;
b. Regardless of subsection 3.a., the reimbursed costs for labor shall be limited to the standard local
labor rate at the time of the pre-recall notification repair charged by the nearest authorized Porsche
dealership for such a repair.
c. Regardless of subsection 3.a., the reimbursed costs for parts shall be limited to PCNA’s retail price
for authorized parts at the time of the pre-recall notification repair.
d. Any other costs, whether associated, consequential, or otherwise, will not be reimbursed.
Documentation Necessary to Obtain Reimbursement.
The following documentation must be submitted to obtain reimbursement:
a. Name and address of the claimant;
b. Documentation establishing vehicle ownership by the claimant at the time of the pre-recall
notification repair;
c. Documentation establishing vehicle make, model, model year and Vehicle Identification Number
(VIN);
d. PCNA’s recall number or NHTSA’s recall number;
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e. A receipt, such as a dealership Repair Order, invoice, or payment information for the pre-recall
notification repair.
(i) Such documentation should provide sufficient information to reflect that the pre-recall
notification repair addressed the same defect or noncompliance that is to be addressed by
the recall. If the documentation does not do that, additional documentation should be
provided by the claimant to make such connection clear.
(ii) If reimbursement is sought for the replacement of a vehicle part, the receipt must identify
the replaced part and state the total amount paid for the part that replaced the defective or
noncompliant part.
f. If the pre-recall notification remedy was obtained at a time when the vehicle could have been
repaired or replaced at no charge under PCNA’s original or extended warranty program, the claimant
must provide documentation indicating that (a) an authorized Porsche dealer or repair facility
refused to remedy the problem addressed by the recall under the warranty or (b) the repair obtained
under warranty did not correct the problem addressed by the recall.
5. Where Reimbursement Documents are to be Submitted.
address:
6.
PCNA will not reimburse claimants who do not submit adequate documentation to PCNA at the following
Porsche Cars North America, Inc.
Attn: Customer Commitment Department
One Porsche Drive
Atlanta, GA 30354
Response to Request for Reimbursement.
a. PCNA will act upon a claim for reimbursement within sixty (60) days of its receipt. If PCNA denies
the claim, PCNA will send a notice to the claimant within sixty (60) days of receipt of the claim,
which will contain a clear, concise statement of the reasons for the denial.
b. If the claim for reimbursement was incomplete when originally submitted, PCNA will advise the
claimant within sixty (60) days of receipt of the claim of the documentation that is needed and offer
the claimant an opportunity in writing to resubmit the claim with complete documentation.
c. Any disputes over the denial in whole or in part of a claim for reimbursement shall be resolved
between the claimant and PCNA. PCNA acknowledges NHTSA’s statement that it will not mediate
or resolve any disputes regarding the eligibility for, or the amount of, reimbursement.
7. Form of Reimbursement.
If the claim is approved in whole or in part, reimbursement will be provided in the form of a check.
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8. Non-application.
Reimbursement for a pre-recall notification remedy shall not be provided to an owner pursuant to this Plan if
the vehicle was bought by the first purchaser more than 15 calendar years before notice was given by PCNA under 49
U.S.C. § 3011 B(c) or an order was issued under 49 U.S.C. § 3011 B(b).
9. Recalls Concerning Labels.
PCNA will not reimburse owners or purchasers for recalls based solely on noncompliant or defective labels.
10. Reimbursement Plan Availability to the Public.
PCNA will make a copy of this Plan available to members of the public upon request.
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