Mk2 Rx300 3.0 Lambda Sensors Denso Dox

[flumperboy]

Hi people . Anyone changed the lambda sensors . I'm looking to change both front and back sensor

I'm good at soldering or changing plugs . But need to know what part numbers etc . Any info would be great . I'll keep up to date the change over . Thanks in advance

[ColinBarber]

Which one(s)?

[flumperboy]

The one on the exhaust manifold front bank . On the rear exhaust manifold rear bank

And the after cat sensor .

[flumperboy]

Well I bought 2 denso dox 0243 front one was easy , back one not so easy but doable with a 22mm spanner , car run terrible , so took them back off ,

[ColinBarber]

DOX-0243 isn't listed as compatible with the series II RX engine. Denso in Europe don't sell a direct OEM fit and the series II RX300 didn't exist in the US so you cannot order from there.

Why are you looking to replace all of the sensors?

[flumperboy]

Not long bought my rx300 and can't say it why it was sold or just coincidence after 2 weeks had p0156 reset code 2 days later p0136 .

After 2 weeks of resetting the code every day and trying to get replacments.

Had a after cat sensor changed got p0420 .

I had a Dox 109 as it matched .

I'm thinking I've been tucked up . £4 k for a scrapper . With a 9 month m.o.t

[ColinBarber]

P0420 is rarely the downstream sensor provided it is the right one, DOX-109 is a correct replacement. More likely a problem with the upstream sensors, a leak in the exhaust or the cat needs replacing.

Where the old sensors Toyota/Denso OEMs or something else?

[flumperboy]

Toyota original .

Back end

89467. 48060

02f13

Front

89467. 48050

02f12

Bank 2 front

Bank 1 back

Plugs were right but car run like a kangaroo lol .

Can see any gas leeks .