Seal(FOR CRANKSHAFT)
90311-42026
162 applications
Europe · 40
General · 31
Japan · 78
United States · 13
This number has been replaced.
Current number:
90080-31022,
90080-31022
— the chain runs 2 steps forward; the last one is what a
dealer would supply.
Fits in Europe 40 vehicles
| Model | Chassis | PNC | Period | Status | |
|---|---|---|---|---|---|
| Camry | SV2#,CV20,VZV21 | 15101A | 1989-06 → 1989-09 | Superseded / ended 1989-09 | Detail |
| Camry | SV2#,CV20,VZV21 | 15101A | 1989-09 → 1991-06 | Superseded / ended 1991-06 | Detail |
| Camry | MCV20,SXV20 | 15101A | 1996-08 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Camry (WG) | SXV10,VCV10 | 15101A | 1992-03 → 1996-07 | Superseded / ended 1996-07 | Detail |
| Camry (JPP) | SV2#,VZV21 | 15101A | 1989-09 → 1991-06 | Superseded / ended 1991-06 | Detail |
| Camry (JPP) | SXV10,VCV10,MCV10 | 15101A | 1991-06 → 1996-08 | Superseded / ended 1996-08 | Detail |
| Camry (JPP) | SXV2#,MCV2# | 15101A | 1996-08 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Camry (SED) | SXV1#,VCV1# | 15101A | 1991-06 → 1996-08 | Superseded / ended 1996-08 | Detail |
| Carina 2 | AT17#,ST171,CT171 | 15101A | 1989-09 → 1990-08 | Superseded / ended 1990-08 | Detail |
| Carina 2 | AT17#,ST171,CT171 | 15101A | 1990-08 → 1992-11 | Superseded / ended 1992-11 | Detail |
| Carina E (UKP) | AT19#,ST191,CT190 | 15101A | 1992-12 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Carina E Sed/LB(JPP) | AT190,CT190,ST191 | 15101A | 1992-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Carina E Sed/LB(JPP) | AT190,CT190,ST191 | 15101A | 1994-01 → 1996-01 | Superseded / ended 1996-01 | Detail |
| Carina E WG (JPP) | AT19#,ST191,CT190 | 15101A | 1992-11 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Carina E WG (JPP) | AT19#,ST191,CT190 | 15101A | 1994-01 → 1996-01 | Superseded / ended 1996-01 | Detail |
| Celica | AT180,ST18# | 15101A | 1989-09 → 1993-09 | Superseded / ended 1993-09 | Detail |
| Celica | AT200,ST204 | 15101A | 1993-09 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Celica | AT180,ST18# | 15101A | 1989-10 → 1993-11 | Superseded / ended 1993-11 | Detail |
| Celica | AT200,ST20# | 15101A | 1993-11 → — | Current | Detail |
| Corolla HB | EE90,AE92,CE90 | 15101A | 1990-10 → 1992-06 | Superseded / ended 1992-06 | Detail |
| Corolla HB/LB | AE10#,CE100,EE10# | 15101A | 1992-05 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Corolla Sed/WG | AE10#,CE100,EE10# | 15101A | 1992-05 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Corolla Sed/LB/WG | EE9#,AE9#,CE90 | 15101A | 1990-10 → 1992-05 | Superseded / ended 1992-05 | Detail |
| Corona FR | CT14#,RT14#,ST141,TT14#,YT140 | 15101A | 1990-10 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Cressida | GX81,LX80,MX8#,RX8# | 11301C | 1991-02 → 1993-02 | Superseded / ended 1993-02 | Detail |
| DYNA100 | YH81,LH80 | 11301C | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| DYNA150 | YY61,LY6# | 11301C | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Hiace Van,Commuter | LH1##,RZH10#,11#,125,135,15# | 11303A | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Hiace Van,Commuter | LH10#,11#,RZH10#,11# | 11303A | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Hilux | LN5#,6#,YN5#,6#,RN5#,6# | 11301C | 1991-02 → 1993-09 | Superseded / ended 1993-09 | Detail |
| Hilux (JPP) | RN1##,YN85,90,1##,LN85,90,1##,VZN1 | 11301C | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Hilux (VWP) | YN85,LN85 | 11301C | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Land Cruiser | BJ73,LJ7#,RJ7#,HZJ7#,PZJ7#,KZJ7# | 11301C | 1991-02 → 1993-05 | Superseded / ended 1993-05 | Detail |
| Land Cruiser | BJ73,LJ7#,RJ7#,HZJ7#,PZJ7#,KZJ7# | 11301C | 1993-05 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Liteace Van Wagon | CR2#,KR2#,YR2# | 15101A | 1992-01 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Liteace Van,Wagon | KM3#,CM3# | 15101A | 1990-10 → 1992-01 | Superseded / ended 1992-01 | Detail |
| MR2 | SW20 | 15101A | 1989-12 → — | Current | Detail |
| MR2 | SW20,21 | 15101A | 1990-01 → 1995-06 | Superseded / ended 1995-06 | Detail |
| RAV4 | SXA1# | 15101A | 1994-04 → 1996-09 | Superseded / ended 1996-09 | Detail |
| RAV4 | SXA1# | 15101A | 1995-11 → 1996-09 | Superseded / ended 1996-09 | Detail |
Fits in General 31 vehicles
| Model | Chassis | PNC | Period | Status | |
|---|---|---|---|---|---|
| Camry (JPP/SED) | SXV1#,VCV10,MCV10 | 15101A | 1992-08 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Camry (NAP/SED/WG) | SXV10,MCV10 | 15101A | 1992-09 → 1996-07 | Superseded / ended 1996-07 | Detail |
| Celica | AT180,ST18# | 15101A | 1989-10 → 1993-11 | Superseded / ended 1993-11 | Detail |
| Celica | ST20# | 15101A | 1993-11 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Celica | ST20# | 15101A | 1996-09 → — | Current | Detail |
| Corolla Sed/CP/WG | AE10#,CE100,EE10# | 15101A | 1992-05 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Corolla Sed/LB/WG | EE9#,AE9#,CE90 | 15101A | 1990-10 → 1992-05 | Superseded / ended 1992-05 | Detail |
| Corona | AT210,ST210 | 15101A | 1996-01 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Corona (SED/LB) | AT190,ST191,CT190 | 15101A | 1996-06 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Corona (SED/LB) | AT190,ST191,CT190 | 15101A | 1992-03 → 1996-06 | Superseded / ended 1996-06 | Detail |
| Corona (SED/LB) | AT190,ST191,CT190 | 15101A | 1992-03 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Corona FR | CT14#,RT14#,ST141,TT14#,YT140 | 15101A | 1990-10 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Corona Sed (UKP) | AT190,CT190,ST191 | 15101A | 1996-01 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Corona WG | ST191 | 15101A | 1992-11 → 1996-01 | Superseded / ended 1996-01 | Detail |
| Corona/Carina 2 | AT17#,CT17#,ST171 | 15101A | 1990-08 → 1992-11 | Superseded / ended 1992-11 | Detail |
| Corona/Carina 2 | AT17#,CT17#,ST171 | 15101A | 1989-09 → 1990-08 | Superseded / ended 1990-08 | Detail |
| Cressida | GX81,LX80,MX8#,RX8# | 11301C | 1991-02 → 1993-02 | Superseded / ended 1993-02 | Detail |
| Crown | YS132,MS13#,GS131,LS130 | 11301C | 1991-02 → 1991-10 | Superseded / ended 1991-10 | Detail |
| Crown | GS131,JZS133,LS130,YS132 | 11301C | 1991-10 → 1994-01 | Superseded / ended 1994-01 | Detail |
| DYNA100 | YH81,LH80 | 11301C | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| DYNA150 | YY5#,6#,LY6# | 11301C | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Hiace Van,Commuter | LH1##,RZH10#,11#,125,135,15# | 11303A | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Hilux | LN5#,6#,YN5#,6#,RN5#,6# | 11301C | 1991-02 → 1993-09 | Superseded / ended 1993-09 | Detail |
| Hilux 2WD | LN200,RN8#,90,125,RZN200,YN8#,9#,L | 11301C | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Hilux/4Runner (4WD) | LN,RN,YN,VZN10#,11#,13#,KZN,LN205 | 11301C | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Land Cruiser | FJ,FZJ,HDJ,HJ,HZJ,KZJ,LJ,PZJ,RJ7# | 11301C | 1991-02 → 1993-05 | Superseded / ended 1993-05 | Detail |
| Land Cruiser | FJ,FZJ,HDJ,HJ,HZJ,KZJ,LJ,PZJ,RJ7# | 11301C | 1993-05 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Liteace | KM3#,YM3#,4#,CM36 | 15101A | 1990-10 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Liteace Van Wagon | CR27,KR2#,YR2#,39 | 15101A | 1992-01 → 1994-01 | Superseded / ended 1994-01 | Detail |
| MR2 | SW20 | 15101A | 1989-12 → — | Current | Detail |
| RAV4 | SXA1# | 15101A | 1994-04 → 1996-09 | Superseded / ended 1996-09 | Detail |
Fits in Japan 78 vehicles
| Model | Chassis | PNC | Period | Status | |
|---|---|---|---|---|---|
| Altezza/Altezza Gita | GXE1#,JCE1#,SXE10 | 15101A | 1998-10 → 2001-05 | Superseded / ended 2001-05 | Detail |
| Altezza/Altezza Gita | GXE1#,JCE1#,SXE10 | 15101A | 2001-05 → — | Current | Detail |
| Caldina | AT191,CT19#,ET196,ST19# | 15101A | 1996-09 → 1997-08 | Superseded / ended 1997-08 | Detail |
| Caldina | AT191,CT19#,ET196,ST19# | 15101A | 1992-11 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Caldina | AT191,CT19#,ET196,ST19# | 15101A | 1992-11 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Caldina | AT211,CT216,ST21# | 15101A | 1997-08 → — | Current | Detail |
| Caldina | AZT24#,ST246,ZZT241 | 15101A | 2005-01 → — | Current | Detail |
| Caldina | AZT24#,ST246,ZZT241 | 15101A | 2002-09 → 2005-01 | Superseded / ended 2005-01 | Detail |
| Camry/Vista | SV2#,VZV20,CV20 | 15101A | 1989-10 → 1990-07 | Superseded / ended 1990-07 | Detail |
| Camry/Vista | SV2#,VZV20,CV20 | 15101A | 1989-09 → 1989-10 | Superseded / ended 1989-10 | Detail |
| Camry/Vista | SV3#,VZV3#,CV30 | 15101A | 1994-01 → 1994-06 | Superseded / ended 1994-06 | Detail |
| Camry/Vista | SV3#,VZV3#,CV30 | 15101A | 1990-07 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Camry/Vista | SV4#,CV4# | 15101A | 1994-06 → 1996-08 | Superseded / ended 1996-08 | Detail |
| Carina ED | ST18# | 15101A | 1989-09 → 1993-09 | Superseded / ended 1993-09 | Detail |
| Carina ED | ST20# | 15101A | 1996-09 → — | Current | Detail |
| Carina ED | ST20# | 15101A | 1993-09 → 1996-08 | Superseded / ended 1996-08 | Detail |
| Carina FF | AT17#,ST170,CT17#,ET176 | 15101A | 1989-09 → 1990-05 | Superseded / ended 1990-05 | Detail |
| Carina FF | AT17#,ST170,CT17#,ET176 | 15101A | 1990-05 → 1992-11 | Superseded / ended 1992-11 | Detail |
| Carina FF | AT19#,CT19#,ST19# | 15101A | 1994-01 → 1996-08 | Superseded / ended 1996-08 | Detail |
| Carina FF | AT19#,CT19#,ST19# | 15101A | 1992-08 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Carina FF | AT21#,CT21#,ST215 | 15101A | 1996-08 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Celica | ST18# | 15101A | 1989-09 → 1993-09 | Superseded / ended 1993-09 | Detail |
| Celica | ST20# | 15101A | 1993-09 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Celica | ST20# | 15101A | 1996-09 → — | Current | Detail |
| Chaser | GX81,LX80,MX83,SX80,YX80,JZX81 | 11301C | 1991-02 → 1992-10 | Superseded / ended 1992-10 | Detail |
| Chaser | GX81,LX80,MX83,SX80,YX80,JZX81 | 15101A | 1989-09 → 1992-10 | Superseded / ended 1992-10 | Detail |
| Chaser | GX90,JZX9#,LX90,SX90 | 15101A | 1992-10 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Chaser | GX90,JZX9#,LX90,SX90 | 11301C | 1992-10 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Corolla | AE9#,CE9#,EE9# | 15101A | 1990-10 → 1991-09 | Superseded / ended 1991-09 | Detail |
| Corolla | AE10#,CE10#,EE10# | 15101A | 1991-06 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Corona | TT14#,AT14#,ST140,RT141,YT140,CT14 | 15101A | 1990-10 → 1991-11 | Superseded / ended 1991-11 | Detail |
| Corona | AT17#,ST17#,CT17#,ET176 | 15101A | 1989-10 → 1990-08 | Superseded / ended 1990-08 | Detail |
| Corona | AT17#,ST17#,CT17#,ET176 | 15101A | 1990-08 → 1992-11 | Superseded / ended 1992-11 | Detail |
| Corona | AT17#,ST17#,CT17#,ET176 | 15101A | 1989-09 → 1989-10 | Superseded / ended 1989-10 | Detail |
| Corona | AT190,CT19#,ST19# | 15101A | 1992-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Corona | AT190,CT19#,ST19# | 15101A | 1994-01 → 1996-01 | Superseded / ended 1996-01 | Detail |
| Corona | AT21#,CT21#,ST21# | 15101A | 1996-01 → 1996-08 | Superseded / ended 1996-08 | Detail |
| Corona Exiv | ST18# | 15101A | 1989-09 → 1993-09 | Superseded / ended 1993-09 | Detail |
| Corona Exiv | ST20# | 15101A | 1996-09 → — | Current | Detail |
| Corona Exiv | ST20# | 15101A | 1993-09 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Cresta | GX81,LX80,MX83,SX80,YX80,JZX81 | 11301C | 1991-02 → 1992-10 | Superseded / ended 1992-10 | Detail |
| Cresta | GX81,LX80,MX83,SX80,YX80,JZX81 | 15101A | 1989-09 → 1992-10 | Superseded / ended 1992-10 | Detail |
| Cresta | GX90,JZX9#,LX90,SX90 | 11301C | 1992-10 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Cresta | GX90,JZX9#,LX90,SX90 | 15101A | 1992-10 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Crown | GS13#,LS13#,MS13#,YS130,UZS131,JZS | 11301C | 1991-02 → 1991-10 | Superseded / ended 1991-10 | Detail |
| Crown | GS13#,JZS13#,LS13#,YS130 | 11301C | 1991-10 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Crown Comfort/Sed | GXS1#,LXS11,SXS1#,YXS1#,GBS12,TSS1 | 15101A | 1996-04 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Crown/Crown Majesta | JZS14#,LS141,UZS14#,GS141 | 11301C | 1991-10 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Curren | ST20# | 15101A | 1994-02 → 1996-08 | Superseded / ended 1996-08 | Detail |
| Curren | ST20# | 15101A | 1996-09 → — | Current | Detail |
| Deliboy | KXC10,CXC10 | 15101A | 1991-05 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Estima Emina/Lucida | CXR1#,2#,TCR1#,2# | 15101A | 1992-01 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Hiace Quick Delivery | LH8# | 11301C | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Hiace Truck | YH81,LH8#,LH9# | 11301C | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Hiace/Regiusace | KZH1##,LH1##,RZH1##,TRH1## | 11303A | 1991-02 → 1993-12 | Superseded / ended 1993-12 | Detail |
| Hilux | KZN130,LN8#,10#,112,13#,VZN130,YN8 | 11301C | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Ipsum | CXM10,SXM1# | 15101A | 1996-05 → 1996-08 | Superseded / ended 1996-08 | Detail |
| Land Cruiser S/T,H/T | FJ75,LJ7#,HZJ7#,PZJ7#,KZJ7# | 11301C | 1991-02 → 1993-05 | Superseded / ended 1993-05 | Detail |
| Lite/Townace Truck | CM5#,6#,KM5#,YM55,6# | 15101A | 1993-10 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Lite/Townace Truck | CM5#,6#,KM5#,YM55,6# | 15101A | 1990-10 → 1993-10 | Superseded / ended 1993-10 | Detail |
| Lite/Townace V,WG | KR27,YR2#,30,CR2#,3# | 15101A | 1992-01 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Liteace Van,Wagon | KM3#,YM3#,40,CM3#,4# | 15101A | 1990-10 → 1992-01 | Superseded / ended 1992-01 | Detail |
| Mark 2 | GX81,LX80,MX83,SX80,YX80,JZX81 | 15101A | 1993-05 → 1995-12 | Superseded / ended 1995-12 | Detail |
| Mark 2 | GX81,LX80,MX83,SX80,YX80,JZX81 | 15101A | 1992-10 → 1993-05 | Superseded / ended 1993-05 | Detail |
| Mark 2 | GX81,LX80,MX83,SX80,YX80,JZX81 | 15101A | 1989-09 → 1992-10 | Superseded / ended 1992-10 | Detail |
| Mark 2 | GX81,LX80,MX83,SX80,YX80,JZX81 | 11301C | 1991-02 → 1993-08 | Superseded / ended 1993-08 | Detail |
| Mark 2 | GX90,LX90,SX90,JZX9# | 15101A | 1992-10 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Mark 2 | GX90,LX90,SX90,JZX9# | 11301C | 1992-10 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Mark 2 V,WG | GX70,LX76,YX7# | 11301C | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| MR2 | SW20 | 15101A | 1989-12 → — | Current | Detail |
| RAV4 | SXA1# | 15101A | 1996-09 → — | Current | Detail |
| RAV4 | SXA1# | 15101A | 1994-04 → 1996-08 | Superseded / ended 1996-08 | Detail |
| Scepter (SED) | SXV10,VCV10 | 15101A | 1992-11 → 1996-08 | Superseded / ended 1996-08 | Detail |
| Scepter (WG,CP) | SXV15,VCV15 | 15101A | 1992-12 → 1996-07 | Superseded / ended 1996-07 | Detail |
| Sprinter | AE9#,CE9#,EE9# | 15101A | 1990-10 → 1991-08 | Superseded / ended 1991-08 | Detail |
| Sprinter | AE10#,CE10#,EE10# | 15101A | 1991-06 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Town/Masterace V,WG | KR2#,YR2#,3#,CR2#,3# | 15101A | 1990-10 → 1992-01 | Superseded / ended 1992-01 | Detail |
| Toyoace/Dyna | LY5#,LY6#,YY5#,YY61 | 11301C | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
Fits in United States 13 vehicles
| Model | Chassis | PNC | Period | Status | |
|---|---|---|---|---|---|
| Camry (JPP) | SV2#,VZV21 | 15101A | 1989-09 → 1991-06 | Superseded / ended 1991-06 | Detail |
| Camry (JPP) | SXV10,VCV10,MCV10 | 15101A | 1991-06 → 1996-08 | Superseded / ended 1996-08 | Detail |
| Camry (JPP) | SXV2#,MCV2# | 15101A | 1996-08 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Camry (NAP) | SV2#,VZV21 | 15101A | 1989-09 → 1991-09 | Superseded / ended 1991-09 | Detail |
| Camry (NAP) | SXV10,VCV10,MCV10 | 15101A | 1991-09 → 1996-07 | Superseded / ended 1996-07 | Detail |
| Camry (NAP) | SXV20,MCV20 | 15101A | 1996-07 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Celica | AT180,ST18# | 15101A | 1989-09 → 1993-09 | Superseded / ended 1993-09 | Detail |
| Celica | AT200,ST204 | 15101A | 1993-09 → 1996-09 | Superseded / ended 1996-09 | Detail |
| Hilux 2WD | LN200,RN8#,90,125,RZN200,YN8#,9#,L | 11301C | 1991-02 → 1994-01 | Superseded / ended 1994-01 | Detail |
| Land Cruiser | FJ,FZJ,HDJ,HJ,HZJ,KZJ,LJ,PZJ,RJ7# | 11301C | 1991-02 → 1993-05 | Superseded / ended 1993-05 | Detail |
| Land Cruiser | FJ,FZJ,HDJ,HJ,HZJ,KZJ,LJ,PZJ,RJ7# | 11301C | 1993-05 → 1994-01 | Superseded / ended 1994-01 | Detail |
| MR2 | SW20,21 | 15101A | 1990-01 → 1995-06 | Superseded / ended 1995-06 | Detail |
| RAV4 | SXA1# | 15101A | 1995-11 → 1996-09 | Superseded / ended 1996-09 | Detail |
Replacement chain
Four out of five replacement numbers are themselves replaced later, so the chain is followed to its end rather than one step.